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19#include "xfs.h"
20#include "xfs_fs.h"
21#include "xfs_format.h"
22#include "xfs_bit.h"
23#include "xfs_log.h"
24#include "xfs_inum.h"
25#include "xfs_trans.h"
26#include "xfs_sb.h"
27#include "xfs_ag.h"
28#include "xfs_mount.h"
29#include "xfs_da_btree.h"
30#include "xfs_bmap_btree.h"
31#include "xfs_alloc_btree.h"
32#include "xfs_ialloc_btree.h"
33#include "xfs_dinode.h"
34#include "xfs_inode.h"
35#include "xfs_btree.h"
36#include "xfs_extfree_item.h"
37#include "xfs_alloc.h"
38#include "xfs_bmap.h"
39#include "xfs_bmap_util.h"
40#include "xfs_rtalloc.h"
41#include "xfs_error.h"
42#include "xfs_quota.h"
43#include "xfs_trans_space.h"
44#include "xfs_trace.h"
45#include "xfs_icache.h"
46
47
48
49
50
51
52
53
54xfs_daddr_t
55xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb)
56{
57 return (XFS_IS_REALTIME_INODE(ip) ? \
58 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
59 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)));
60}
61
62
63
64
65
66
67
68
69
70
71int
72xfs_bmap_finish(
73 xfs_trans_t **tp,
74 xfs_bmap_free_t *flist,
75 int *committed)
76{
77 xfs_efd_log_item_t *efd;
78 xfs_efi_log_item_t *efi;
79 int error;
80 xfs_bmap_free_item_t *free;
81 struct xfs_trans_res tres;
82 xfs_mount_t *mp;
83 xfs_bmap_free_item_t *next;
84 xfs_trans_t *ntp;
85
86 ASSERT((*tp)->t_flags & XFS_TRANS_PERM_LOG_RES);
87 if (flist->xbf_count == 0) {
88 *committed = 0;
89 return 0;
90 }
91 ntp = *tp;
92 efi = xfs_trans_get_efi(ntp, flist->xbf_count);
93 for (free = flist->xbf_first; free; free = free->xbfi_next)
94 xfs_trans_log_efi_extent(ntp, efi, free->xbfi_startblock,
95 free->xbfi_blockcount);
96
97 tres.tr_logres = ntp->t_log_res;
98 tres.tr_logcount = ntp->t_log_count;
99 tres.tr_logflags = XFS_TRANS_PERM_LOG_RES;
100 ntp = xfs_trans_dup(*tp);
101 error = xfs_trans_commit(*tp, 0);
102 *tp = ntp;
103 *committed = 1;
104
105
106
107
108 if (error)
109 return error;
110
111
112
113
114
115 xfs_log_ticket_put(ntp->t_ticket);
116
117 error = xfs_trans_reserve(ntp, &tres, 0, 0);
118 if (error)
119 return error;
120 efd = xfs_trans_get_efd(ntp, efi, flist->xbf_count);
121 for (free = flist->xbf_first; free != NULL; free = next) {
122 next = free->xbfi_next;
123 if ((error = xfs_free_extent(ntp, free->xbfi_startblock,
124 free->xbfi_blockcount))) {
125
126
127
128
129
130
131
132
133 mp = ntp->t_mountp;
134 if (!XFS_FORCED_SHUTDOWN(mp))
135 xfs_force_shutdown(mp,
136 (error == EFSCORRUPTED) ?
137 SHUTDOWN_CORRUPT_INCORE :
138 SHUTDOWN_META_IO_ERROR);
139 return error;
140 }
141 xfs_trans_log_efd_extent(ntp, efd, free->xbfi_startblock,
142 free->xbfi_blockcount);
143 xfs_bmap_del_free(flist, NULL, free);
144 }
145 return 0;
146}
147
148int
149xfs_bmap_rtalloc(
150 struct xfs_bmalloca *ap)
151{
152 xfs_alloctype_t atype = 0;
153 int error;
154 xfs_mount_t *mp;
155 xfs_extlen_t prod = 0;
156 xfs_extlen_t ralen = 0;
157 xfs_extlen_t align;
158 xfs_rtblock_t rtb;
159
160 mp = ap->ip->i_mount;
161 align = xfs_get_extsz_hint(ap->ip);
162 prod = align / mp->m_sb.sb_rextsize;
163 error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
164 align, 1, ap->eof, 0,
165 ap->conv, &ap->offset, &ap->length);
166 if (error)
167 return error;
168 ASSERT(ap->length);
169 ASSERT(ap->length % mp->m_sb.sb_rextsize == 0);
170
171
172
173
174
175 if (do_mod(ap->offset, align) || ap->length % align)
176 prod = 1;
177
178
179
180 ralen = ap->length / mp->m_sb.sb_rextsize;
181
182
183
184
185
186
187
188 if (ralen * mp->m_sb.sb_rextsize >= MAXEXTLEN)
189 ralen = MAXEXTLEN / mp->m_sb.sb_rextsize;
190
191
192
193
194 xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL);
195 xfs_trans_ijoin(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL);
196
197
198
199
200
201 if (ap->eof && ap->offset == 0) {
202 xfs_rtblock_t uninitialized_var(rtx);
203
204 error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
205 if (error)
206 return error;
207 ap->blkno = rtx * mp->m_sb.sb_rextsize;
208 } else {
209 ap->blkno = 0;
210 }
211
212 xfs_bmap_adjacent(ap);
213
214
215
216
217 atype = ap->blkno == 0 ? XFS_ALLOCTYPE_ANY_AG : XFS_ALLOCTYPE_NEAR_BNO;
218 do_div(ap->blkno, mp->m_sb.sb_rextsize);
219 rtb = ap->blkno;
220 ap->length = ralen;
221 if ((error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1, ap->length,
222 &ralen, atype, ap->wasdel, prod, &rtb)))
223 return error;
224 if (rtb == NULLFSBLOCK && prod > 1 &&
225 (error = xfs_rtallocate_extent(ap->tp, ap->blkno, 1,
226 ap->length, &ralen, atype,
227 ap->wasdel, 1, &rtb)))
228 return error;
229 ap->blkno = rtb;
230 if (ap->blkno != NULLFSBLOCK) {
231 ap->blkno *= mp->m_sb.sb_rextsize;
232 ralen *= mp->m_sb.sb_rextsize;
233 ap->length = ralen;
234 ap->ip->i_d.di_nblocks += ralen;
235 xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
236 if (ap->wasdel)
237 ap->ip->i_delayed_blks -= ralen;
238
239
240
241
242 xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
243 ap->wasdel ? XFS_TRANS_DQ_DELRTBCOUNT :
244 XFS_TRANS_DQ_RTBCOUNT, (long) ralen);
245 } else {
246 ap->length = 0;
247 }
248 return 0;
249}
250
251
252
253
254static void
255xfs_bmapi_allocate_worker(
256 struct work_struct *work)
257{
258 struct xfs_bmalloca *args = container_of(work,
259 struct xfs_bmalloca, work);
260 unsigned long pflags;
261
262
263 current_set_flags_nested(&pflags, PF_FSTRANS);
264
265 args->result = __xfs_bmapi_allocate(args);
266 complete(args->done);
267
268 current_restore_flags_nested(&pflags, PF_FSTRANS);
269}
270
271
272
273
274
275
276int
277xfs_bmapi_allocate(
278 struct xfs_bmalloca *args)
279{
280 DECLARE_COMPLETION_ONSTACK(done);
281
282 if (!args->stack_switch)
283 return __xfs_bmapi_allocate(args);
284
285
286 args->done = &done;
287 INIT_WORK_ONSTACK(&args->work, xfs_bmapi_allocate_worker);
288 queue_work(xfs_alloc_wq, &args->work);
289 wait_for_completion(&done);
290 return args->result;
291}
292
293
294
295
296
297
298int
299xfs_bmap_eof(
300 struct xfs_inode *ip,
301 xfs_fileoff_t endoff,
302 int whichfork,
303 int *eof)
304{
305 struct xfs_bmbt_irec rec;
306 int error;
307
308 error = xfs_bmap_last_extent(NULL, ip, whichfork, &rec, eof);
309 if (error || *eof)
310 return error;
311
312 *eof = endoff >= rec.br_startoff + rec.br_blockcount;
313 return 0;
314}
315
316
317
318
319
320
321
322
323STATIC void
324xfs_bmap_count_leaves(
325 xfs_ifork_t *ifp,
326 xfs_extnum_t idx,
327 int numrecs,
328 int *count)
329{
330 int b;
331
332 for (b = 0; b < numrecs; b++) {
333 xfs_bmbt_rec_host_t *frp = xfs_iext_get_ext(ifp, idx + b);
334 *count += xfs_bmbt_get_blockcount(frp);
335 }
336}
337
338
339
340
341
342STATIC void
343xfs_bmap_disk_count_leaves(
344 struct xfs_mount *mp,
345 struct xfs_btree_block *block,
346 int numrecs,
347 int *count)
348{
349 int b;
350 xfs_bmbt_rec_t *frp;
351
352 for (b = 1; b <= numrecs; b++) {
353 frp = XFS_BMBT_REC_ADDR(mp, block, b);
354 *count += xfs_bmbt_disk_get_blockcount(frp);
355 }
356}
357
358
359
360
361
362STATIC int
363xfs_bmap_count_tree(
364 xfs_mount_t *mp,
365 xfs_trans_t *tp,
366 xfs_ifork_t *ifp,
367 xfs_fsblock_t blockno,
368 int levelin,
369 int *count)
370{
371 int error;
372 xfs_buf_t *bp, *nbp;
373 int level = levelin;
374 __be64 *pp;
375 xfs_fsblock_t bno = blockno;
376 xfs_fsblock_t nextbno;
377 struct xfs_btree_block *block, *nextblock;
378 int numrecs;
379
380 error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF,
381 &xfs_bmbt_buf_ops);
382 if (error)
383 return error;
384 *count += 1;
385 block = XFS_BUF_TO_BLOCK(bp);
386
387 if (--level) {
388
389 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
390 while (nextbno != NULLFSBLOCK) {
391 error = xfs_btree_read_bufl(mp, tp, nextbno, 0, &nbp,
392 XFS_BMAP_BTREE_REF,
393 &xfs_bmbt_buf_ops);
394 if (error)
395 return error;
396 *count += 1;
397 nextblock = XFS_BUF_TO_BLOCK(nbp);
398 nextbno = be64_to_cpu(nextblock->bb_u.l.bb_rightsib);
399 xfs_trans_brelse(tp, nbp);
400 }
401
402
403 pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
404 bno = be64_to_cpu(*pp);
405 if (unlikely((error =
406 xfs_bmap_count_tree(mp, tp, ifp, bno, level, count)) < 0)) {
407 xfs_trans_brelse(tp, bp);
408 XFS_ERROR_REPORT("xfs_bmap_count_tree(1)",
409 XFS_ERRLEVEL_LOW, mp);
410 return XFS_ERROR(EFSCORRUPTED);
411 }
412 xfs_trans_brelse(tp, bp);
413 } else {
414
415 for (;;) {
416 nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
417 numrecs = be16_to_cpu(block->bb_numrecs);
418 xfs_bmap_disk_count_leaves(mp, block, numrecs, count);
419 xfs_trans_brelse(tp, bp);
420 if (nextbno == NULLFSBLOCK)
421 break;
422 bno = nextbno;
423 error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
424 XFS_BMAP_BTREE_REF,
425 &xfs_bmbt_buf_ops);
426 if (error)
427 return error;
428 *count += 1;
429 block = XFS_BUF_TO_BLOCK(bp);
430 }
431 }
432 return 0;
433}
434
435
436
437
438int
439xfs_bmap_count_blocks(
440 xfs_trans_t *tp,
441 xfs_inode_t *ip,
442 int whichfork,
443 int *count)
444{
445 struct xfs_btree_block *block;
446 xfs_fsblock_t bno;
447 xfs_ifork_t *ifp;
448 int level;
449 xfs_mount_t *mp;
450 __be64 *pp;
451
452 bno = NULLFSBLOCK;
453 mp = ip->i_mount;
454 ifp = XFS_IFORK_PTR(ip, whichfork);
455 if ( XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_EXTENTS ) {
456 xfs_bmap_count_leaves(ifp, 0,
457 ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t),
458 count);
459 return 0;
460 }
461
462
463
464
465 block = ifp->if_broot;
466 level = be16_to_cpu(block->bb_level);
467 ASSERT(level > 0);
468 pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
469 bno = be64_to_cpu(*pp);
470 ASSERT(bno != NULLDFSBNO);
471 ASSERT(XFS_FSB_TO_AGNO(mp, bno) < mp->m_sb.sb_agcount);
472 ASSERT(XFS_FSB_TO_AGBNO(mp, bno) < mp->m_sb.sb_agblocks);
473
474 if (unlikely(xfs_bmap_count_tree(mp, tp, ifp, bno, level, count) < 0)) {
475 XFS_ERROR_REPORT("xfs_bmap_count_blocks(2)", XFS_ERRLEVEL_LOW,
476 mp);
477 return XFS_ERROR(EFSCORRUPTED);
478 }
479
480 return 0;
481}
482
483
484
485
486STATIC int
487xfs_getbmapx_fix_eof_hole(
488 xfs_inode_t *ip,
489 struct getbmapx *out,
490 int prealloced,
491
492 __int64_t end,
493 xfs_fsblock_t startblock)
494{
495 __int64_t fixlen;
496 xfs_mount_t *mp;
497 xfs_ifork_t *ifp;
498 xfs_extnum_t lastx;
499 xfs_fileoff_t fileblock;
500
501 if (startblock == HOLESTARTBLOCK) {
502 mp = ip->i_mount;
503 out->bmv_block = -1;
504 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, XFS_ISIZE(ip)));
505 fixlen -= out->bmv_offset;
506 if (prealloced && out->bmv_offset + out->bmv_length == end) {
507
508 if (fixlen <= 0)
509 return 0;
510 out->bmv_length = fixlen;
511 }
512 } else {
513 if (startblock == DELAYSTARTBLOCK)
514 out->bmv_block = -2;
515 else
516 out->bmv_block = xfs_fsb_to_db(ip, startblock);
517 fileblock = XFS_BB_TO_FSB(ip->i_mount, out->bmv_offset);
518 ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
519 if (xfs_iext_bno_to_ext(ifp, fileblock, &lastx) &&
520 (lastx == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))-1))
521 out->bmv_oflags |= BMV_OF_LAST;
522 }
523
524 return 1;
525}
526
527
528
529
530
531
532
533
534int
535xfs_getbmap(
536 xfs_inode_t *ip,
537 struct getbmapx *bmv,
538 xfs_bmap_format_t formatter,
539 void *arg)
540{
541 __int64_t bmvend;
542 int error = 0;
543 __int64_t fixlen;
544 int i;
545 int lock;
546 xfs_bmbt_irec_t *map;
547 xfs_mount_t *mp;
548 int nex;
549 int nexleft;
550 int subnex;
551 int nmap;
552 struct getbmapx *out;
553 int whichfork;
554 int prealloced;
555
556 int iflags;
557 int bmapi_flags;
558 int cur_ext = 0;
559
560 mp = ip->i_mount;
561 iflags = bmv->bmv_iflags;
562 whichfork = iflags & BMV_IF_ATTRFORK ? XFS_ATTR_FORK : XFS_DATA_FORK;
563
564 if (whichfork == XFS_ATTR_FORK) {
565 if (XFS_IFORK_Q(ip)) {
566 if (ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS &&
567 ip->i_d.di_aformat != XFS_DINODE_FMT_BTREE &&
568 ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)
569 return XFS_ERROR(EINVAL);
570 } else if (unlikely(
571 ip->i_d.di_aformat != 0 &&
572 ip->i_d.di_aformat != XFS_DINODE_FMT_EXTENTS)) {
573 XFS_ERROR_REPORT("xfs_getbmap", XFS_ERRLEVEL_LOW,
574 ip->i_mount);
575 return XFS_ERROR(EFSCORRUPTED);
576 }
577
578 prealloced = 0;
579 fixlen = 1LL << 32;
580 } else {
581 if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS &&
582 ip->i_d.di_format != XFS_DINODE_FMT_BTREE &&
583 ip->i_d.di_format != XFS_DINODE_FMT_LOCAL)
584 return XFS_ERROR(EINVAL);
585
586 if (xfs_get_extsz_hint(ip) ||
587 ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC|XFS_DIFLAG_APPEND)){
588 prealloced = 1;
589 fixlen = mp->m_super->s_maxbytes;
590 } else {
591 prealloced = 0;
592 fixlen = XFS_ISIZE(ip);
593 }
594 }
595
596 if (bmv->bmv_length == -1) {
597 fixlen = XFS_FSB_TO_BB(mp, XFS_B_TO_FSB(mp, fixlen));
598 bmv->bmv_length =
599 max_t(__int64_t, fixlen - bmv->bmv_offset, 0);
600 } else if (bmv->bmv_length == 0) {
601 bmv->bmv_entries = 0;
602 return 0;
603 } else if (bmv->bmv_length < 0) {
604 return XFS_ERROR(EINVAL);
605 }
606
607 nex = bmv->bmv_count - 1;
608 if (nex <= 0)
609 return XFS_ERROR(EINVAL);
610 bmvend = bmv->bmv_offset + bmv->bmv_length;
611
612
613 if (bmv->bmv_count > ULONG_MAX / sizeof(struct getbmapx))
614 return XFS_ERROR(ENOMEM);
615 out = kmem_zalloc_large(bmv->bmv_count * sizeof(struct getbmapx), 0);
616 if (!out)
617 return XFS_ERROR(ENOMEM);
618
619 xfs_ilock(ip, XFS_IOLOCK_SHARED);
620 if (whichfork == XFS_DATA_FORK && !(iflags & BMV_IF_DELALLOC)) {
621 if (ip->i_delayed_blks || XFS_ISIZE(ip) > ip->i_d.di_size) {
622 error = -filemap_write_and_wait(VFS_I(ip)->i_mapping);
623 if (error)
624 goto out_unlock_iolock;
625 }
626
627
628
629
630
631
632
633 }
634
635 lock = xfs_ilock_map_shared(ip);
636
637
638
639
640
641 if (nex > XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1)
642 nex = XFS_IFORK_NEXTENTS(ip, whichfork) * 2 + 1;
643
644 bmapi_flags = xfs_bmapi_aflag(whichfork);
645 if (!(iflags & BMV_IF_PREALLOC))
646 bmapi_flags |= XFS_BMAPI_IGSTATE;
647
648
649
650
651 error = ENOMEM;
652 subnex = 16;
653 map = kmem_alloc(subnex * sizeof(*map), KM_MAYFAIL | KM_NOFS);
654 if (!map)
655 goto out_unlock_ilock;
656
657 bmv->bmv_entries = 0;
658
659 if (XFS_IFORK_NEXTENTS(ip, whichfork) == 0 &&
660 (whichfork == XFS_ATTR_FORK || !(iflags & BMV_IF_DELALLOC))) {
661 error = 0;
662 goto out_free_map;
663 }
664
665 nexleft = nex;
666
667 do {
668 nmap = (nexleft > subnex) ? subnex : nexleft;
669 error = xfs_bmapi_read(ip, XFS_BB_TO_FSBT(mp, bmv->bmv_offset),
670 XFS_BB_TO_FSB(mp, bmv->bmv_length),
671 map, &nmap, bmapi_flags);
672 if (error)
673 goto out_free_map;
674 ASSERT(nmap <= subnex);
675
676 for (i = 0; i < nmap && nexleft && bmv->bmv_length; i++) {
677 out[cur_ext].bmv_oflags = 0;
678 if (map[i].br_state == XFS_EXT_UNWRITTEN)
679 out[cur_ext].bmv_oflags |= BMV_OF_PREALLOC;
680 else if (map[i].br_startblock == DELAYSTARTBLOCK)
681 out[cur_ext].bmv_oflags |= BMV_OF_DELALLOC;
682 out[cur_ext].bmv_offset =
683 XFS_FSB_TO_BB(mp, map[i].br_startoff);
684 out[cur_ext].bmv_length =
685 XFS_FSB_TO_BB(mp, map[i].br_blockcount);
686 out[cur_ext].bmv_unused1 = 0;
687 out[cur_ext].bmv_unused2 = 0;
688
689
690
691
692
693
694
695
696
697
698 if (map[i].br_startblock == DELAYSTARTBLOCK &&
699 map[i].br_startoff <= XFS_B_TO_FSB(mp, XFS_ISIZE(ip)))
700 ASSERT((iflags & BMV_IF_DELALLOC) != 0);
701
702 if (map[i].br_startblock == HOLESTARTBLOCK &&
703 whichfork == XFS_ATTR_FORK) {
704
705 out[cur_ext].bmv_oflags |= BMV_OF_LAST;
706 goto out_free_map;
707 }
708
709 if (!xfs_getbmapx_fix_eof_hole(ip, &out[cur_ext],
710 prealloced, bmvend,
711 map[i].br_startblock))
712 goto out_free_map;
713
714 bmv->bmv_offset =
715 out[cur_ext].bmv_offset +
716 out[cur_ext].bmv_length;
717 bmv->bmv_length =
718 max_t(__int64_t, 0, bmvend - bmv->bmv_offset);
719
720
721
722
723
724
725 if ((iflags & BMV_IF_NO_HOLES) &&
726 map[i].br_startblock == HOLESTARTBLOCK) {
727 memset(&out[cur_ext], 0, sizeof(out[cur_ext]));
728 continue;
729 }
730
731 nexleft--;
732 bmv->bmv_entries++;
733 cur_ext++;
734 }
735 } while (nmap && nexleft && bmv->bmv_length);
736
737 out_free_map:
738 kmem_free(map);
739 out_unlock_ilock:
740 xfs_iunlock_map_shared(ip, lock);
741 out_unlock_iolock:
742 xfs_iunlock(ip, XFS_IOLOCK_SHARED);
743
744 for (i = 0; i < cur_ext; i++) {
745 int full = 0;
746
747
748 error = formatter(&arg, &out[i], &full);
749 if (error || full)
750 break;
751 }
752
753 kmem_free(out);
754 return error;
755}
756
757
758
759
760
761
762
763
764
765int
766xfs_bmap_punch_delalloc_range(
767 struct xfs_inode *ip,
768 xfs_fileoff_t start_fsb,
769 xfs_fileoff_t length)
770{
771 xfs_fileoff_t remaining = length;
772 int error = 0;
773
774 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
775
776 do {
777 int done;
778 xfs_bmbt_irec_t imap;
779 int nimaps = 1;
780 xfs_fsblock_t firstblock;
781 xfs_bmap_free_t flist;
782
783
784
785
786
787
788
789 error = xfs_bmapi_read(ip, start_fsb, 1, &imap, &nimaps,
790 XFS_BMAPI_ENTIRE);
791
792 if (error) {
793
794 if (!XFS_FORCED_SHUTDOWN(ip->i_mount)) {
795 xfs_alert(ip->i_mount,
796 "Failed delalloc mapping lookup ino %lld fsb %lld.",
797 ip->i_ino, start_fsb);
798 }
799 break;
800 }
801 if (!nimaps) {
802
803 goto next_block;
804 }
805 if (imap.br_startblock != DELAYSTARTBLOCK) {
806
807 goto next_block;
808 }
809 WARN_ON(imap.br_blockcount == 0);
810
811
812
813
814
815
816
817 xfs_bmap_init(&flist, &firstblock);
818 error = xfs_bunmapi(NULL, ip, start_fsb, 1, 0, 1, &firstblock,
819 &flist, &done);
820 if (error)
821 break;
822
823 ASSERT(!flist.xbf_count && !flist.xbf_first);
824next_block:
825 start_fsb++;
826 remaining--;
827 } while(remaining > 0);
828
829 return error;
830}
831
832
833
834
835
836
837bool
838xfs_can_free_eofblocks(struct xfs_inode *ip, bool force)
839{
840
841 if (!S_ISREG(ip->i_d.di_mode))
842 return false;
843
844
845
846
847
848 if (VFS_I(ip)->i_size == 0 &&
849 VN_CACHED(VFS_I(ip)) == 0 &&
850 ip->i_delayed_blks == 0)
851 return false;
852
853
854 if (!(ip->i_df.if_flags & XFS_IFEXTENTS))
855 return false;
856
857
858
859
860
861 if (ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND))
862 if (!force || ip->i_delayed_blks == 0)
863 return false;
864
865 return true;
866}
867
868
869
870
871
872
873int
874xfs_free_eofblocks(
875 xfs_mount_t *mp,
876 xfs_inode_t *ip,
877 bool need_iolock)
878{
879 xfs_trans_t *tp;
880 int error;
881 xfs_fileoff_t end_fsb;
882 xfs_fileoff_t last_fsb;
883 xfs_filblks_t map_len;
884 int nimaps;
885 xfs_bmbt_irec_t imap;
886
887
888
889
890
891 end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)XFS_ISIZE(ip));
892 last_fsb = XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
893 if (last_fsb <= end_fsb)
894 return 0;
895 map_len = last_fsb - end_fsb;
896
897 nimaps = 1;
898 xfs_ilock(ip, XFS_ILOCK_SHARED);
899 error = xfs_bmapi_read(ip, end_fsb, map_len, &imap, &nimaps, 0);
900 xfs_iunlock(ip, XFS_ILOCK_SHARED);
901
902 if (!error && (nimaps != 0) &&
903 (imap.br_startblock != HOLESTARTBLOCK ||
904 ip->i_delayed_blks)) {
905
906
907
908 error = xfs_qm_dqattach(ip, 0);
909 if (error)
910 return error;
911
912
913
914
915
916
917 tp = xfs_trans_alloc(mp, XFS_TRANS_INACTIVE);
918
919 if (need_iolock) {
920 if (!xfs_ilock_nowait(ip, XFS_IOLOCK_EXCL)) {
921 xfs_trans_cancel(tp, 0);
922 return EAGAIN;
923 }
924 }
925
926 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
927 if (error) {
928 ASSERT(XFS_FORCED_SHUTDOWN(mp));
929 xfs_trans_cancel(tp, 0);
930 if (need_iolock)
931 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
932 return error;
933 }
934
935 xfs_ilock(ip, XFS_ILOCK_EXCL);
936 xfs_trans_ijoin(tp, ip, 0);
937
938
939
940
941
942
943
944 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK,
945 XFS_ISIZE(ip));
946 if (error) {
947
948
949
950
951 xfs_trans_cancel(tp,
952 (XFS_TRANS_RELEASE_LOG_RES |
953 XFS_TRANS_ABORT));
954 } else {
955 error = xfs_trans_commit(tp,
956 XFS_TRANS_RELEASE_LOG_RES);
957 if (!error)
958 xfs_inode_clear_eofblocks_tag(ip);
959 }
960
961 xfs_iunlock(ip, XFS_ILOCK_EXCL);
962 if (need_iolock)
963 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
964 }
965 return error;
966}
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987STATIC int
988xfs_alloc_file_space(
989 xfs_inode_t *ip,
990 xfs_off_t offset,
991 xfs_off_t len,
992 int alloc_type,
993 int attr_flags)
994{
995 xfs_mount_t *mp = ip->i_mount;
996 xfs_off_t count;
997 xfs_filblks_t allocated_fsb;
998 xfs_filblks_t allocatesize_fsb;
999 xfs_extlen_t extsz, temp;
1000 xfs_fileoff_t startoffset_fsb;
1001 xfs_fsblock_t firstfsb;
1002 int nimaps;
1003 int quota_flag;
1004 int rt;
1005 xfs_trans_t *tp;
1006 xfs_bmbt_irec_t imaps[1], *imapp;
1007 xfs_bmap_free_t free_list;
1008 uint qblocks, resblks, resrtextents;
1009 int committed;
1010 int error;
1011
1012 trace_xfs_alloc_file_space(ip);
1013
1014 if (XFS_FORCED_SHUTDOWN(mp))
1015 return XFS_ERROR(EIO);
1016
1017 error = xfs_qm_dqattach(ip, 0);
1018 if (error)
1019 return error;
1020
1021 if (len <= 0)
1022 return XFS_ERROR(EINVAL);
1023
1024 rt = XFS_IS_REALTIME_INODE(ip);
1025 extsz = xfs_get_extsz_hint(ip);
1026
1027 count = len;
1028 imapp = &imaps[0];
1029 nimaps = 1;
1030 startoffset_fsb = XFS_B_TO_FSBT(mp, offset);
1031 allocatesize_fsb = XFS_B_TO_FSB(mp, count);
1032
1033
1034
1035
1036 while (allocatesize_fsb && !error) {
1037 xfs_fileoff_t s, e;
1038
1039
1040
1041
1042 if (unlikely(extsz)) {
1043 s = startoffset_fsb;
1044 do_div(s, extsz);
1045 s *= extsz;
1046 e = startoffset_fsb + allocatesize_fsb;
1047 if ((temp = do_mod(startoffset_fsb, extsz)))
1048 e += temp;
1049 if ((temp = do_mod(e, extsz)))
1050 e += extsz - temp;
1051 } else {
1052 s = 0;
1053 e = allocatesize_fsb;
1054 }
1055
1056
1057
1058
1059
1060
1061
1062
1063 resblks = min_t(xfs_fileoff_t, (e - s), (MAXEXTLEN * nimaps));
1064 if (unlikely(rt)) {
1065 resrtextents = qblocks = resblks;
1066 resrtextents /= mp->m_sb.sb_rextsize;
1067 resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
1068 quota_flag = XFS_QMOPT_RES_RTBLKS;
1069 } else {
1070 resrtextents = 0;
1071 resblks = qblocks = XFS_DIOSTRAT_SPACE_RES(mp, resblks);
1072 quota_flag = XFS_QMOPT_RES_REGBLKS;
1073 }
1074
1075
1076
1077
1078 tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
1079 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write,
1080 resblks, resrtextents);
1081
1082
1083
1084 if (error) {
1085
1086
1087
1088 ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
1089 xfs_trans_cancel(tp, 0);
1090 break;
1091 }
1092 xfs_ilock(ip, XFS_ILOCK_EXCL);
1093 error = xfs_trans_reserve_quota_nblks(tp, ip, qblocks,
1094 0, quota_flag);
1095 if (error)
1096 goto error1;
1097
1098 xfs_trans_ijoin(tp, ip, 0);
1099
1100 xfs_bmap_init(&free_list, &firstfsb);
1101 error = xfs_bmapi_write(tp, ip, startoffset_fsb,
1102 allocatesize_fsb, alloc_type, &firstfsb,
1103 0, imapp, &nimaps, &free_list);
1104 if (error) {
1105 goto error0;
1106 }
1107
1108
1109
1110
1111 error = xfs_bmap_finish(&tp, &free_list, &committed);
1112 if (error) {
1113 goto error0;
1114 }
1115
1116 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
1117 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1118 if (error) {
1119 break;
1120 }
1121
1122 allocated_fsb = imapp->br_blockcount;
1123
1124 if (nimaps == 0) {
1125 error = XFS_ERROR(ENOSPC);
1126 break;
1127 }
1128
1129 startoffset_fsb += allocated_fsb;
1130 allocatesize_fsb -= allocated_fsb;
1131 }
1132
1133 return error;
1134
1135error0:
1136 xfs_bmap_cancel(&free_list);
1137 xfs_trans_unreserve_quota_nblks(tp, ip, (long)qblocks, 0, quota_flag);
1138
1139error1:
1140 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
1141 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1142 return error;
1143}
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156STATIC int
1157xfs_zero_remaining_bytes(
1158 xfs_inode_t *ip,
1159 xfs_off_t startoff,
1160 xfs_off_t endoff)
1161{
1162 xfs_bmbt_irec_t imap;
1163 xfs_fileoff_t offset_fsb;
1164 xfs_off_t lastoffset;
1165 xfs_off_t offset;
1166 xfs_buf_t *bp;
1167 xfs_mount_t *mp = ip->i_mount;
1168 int nimap;
1169 int error = 0;
1170
1171
1172
1173
1174
1175
1176 if (startoff >= XFS_ISIZE(ip))
1177 return 0;
1178
1179 if (endoff > XFS_ISIZE(ip))
1180 endoff = XFS_ISIZE(ip);
1181
1182 bp = xfs_buf_get_uncached(XFS_IS_REALTIME_INODE(ip) ?
1183 mp->m_rtdev_targp : mp->m_ddev_targp,
1184 BTOBB(mp->m_sb.sb_blocksize), 0);
1185 if (!bp)
1186 return XFS_ERROR(ENOMEM);
1187
1188 xfs_buf_unlock(bp);
1189
1190 for (offset = startoff; offset <= endoff; offset = lastoffset + 1) {
1191 offset_fsb = XFS_B_TO_FSBT(mp, offset);
1192 nimap = 1;
1193 error = xfs_bmapi_read(ip, offset_fsb, 1, &imap, &nimap, 0);
1194 if (error || nimap < 1)
1195 break;
1196 ASSERT(imap.br_blockcount >= 1);
1197 ASSERT(imap.br_startoff == offset_fsb);
1198 lastoffset = XFS_FSB_TO_B(mp, imap.br_startoff + 1) - 1;
1199 if (lastoffset > endoff)
1200 lastoffset = endoff;
1201 if (imap.br_startblock == HOLESTARTBLOCK)
1202 continue;
1203 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
1204 if (imap.br_state == XFS_EXT_UNWRITTEN)
1205 continue;
1206 XFS_BUF_UNDONE(bp);
1207 XFS_BUF_UNWRITE(bp);
1208 XFS_BUF_READ(bp);
1209 XFS_BUF_SET_ADDR(bp, xfs_fsb_to_db(ip, imap.br_startblock));
1210 xfsbdstrat(mp, bp);
1211 error = xfs_buf_iowait(bp);
1212 if (error) {
1213 xfs_buf_ioerror_alert(bp,
1214 "xfs_zero_remaining_bytes(read)");
1215 break;
1216 }
1217 memset(bp->b_addr +
1218 (offset - XFS_FSB_TO_B(mp, imap.br_startoff)),
1219 0, lastoffset - offset + 1);
1220 XFS_BUF_UNDONE(bp);
1221 XFS_BUF_UNREAD(bp);
1222 XFS_BUF_WRITE(bp);
1223 xfsbdstrat(mp, bp);
1224 error = xfs_buf_iowait(bp);
1225 if (error) {
1226 xfs_buf_ioerror_alert(bp,
1227 "xfs_zero_remaining_bytes(write)");
1228 break;
1229 }
1230 }
1231 xfs_buf_free(bp);
1232 return error;
1233}
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247STATIC int
1248xfs_free_file_space(
1249 xfs_inode_t *ip,
1250 xfs_off_t offset,
1251 xfs_off_t len,
1252 int attr_flags)
1253{
1254 int committed;
1255 int done;
1256 xfs_fileoff_t endoffset_fsb;
1257 int error;
1258 xfs_fsblock_t firstfsb;
1259 xfs_bmap_free_t free_list;
1260 xfs_bmbt_irec_t imap;
1261 xfs_off_t ioffset;
1262 xfs_extlen_t mod=0;
1263 xfs_mount_t *mp;
1264 int nimap;
1265 uint resblks;
1266 xfs_off_t rounding;
1267 int rt;
1268 xfs_fileoff_t startoffset_fsb;
1269 xfs_trans_t *tp;
1270 int need_iolock = 1;
1271
1272 mp = ip->i_mount;
1273
1274 trace_xfs_free_file_space(ip);
1275
1276 error = xfs_qm_dqattach(ip, 0);
1277 if (error)
1278 return error;
1279
1280 error = 0;
1281 if (len <= 0)
1282 return error;
1283 rt = XFS_IS_REALTIME_INODE(ip);
1284 startoffset_fsb = XFS_B_TO_FSB(mp, offset);
1285 endoffset_fsb = XFS_B_TO_FSBT(mp, offset + len);
1286
1287 if (attr_flags & XFS_ATTR_NOLOCK)
1288 need_iolock = 0;
1289 if (need_iolock) {
1290 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1291
1292 inode_dio_wait(VFS_I(ip));
1293 }
1294
1295 rounding = max_t(xfs_off_t, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
1296 ioffset = offset & ~(rounding - 1);
1297 error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
1298 ioffset, -1);
1299 if (error)
1300 goto out_unlock_iolock;
1301 truncate_pagecache_range(VFS_I(ip), ioffset, -1);
1302
1303
1304
1305
1306
1307
1308
1309 if (rt && !xfs_sb_version_hasextflgbit(&mp->m_sb)) {
1310 nimap = 1;
1311 error = xfs_bmapi_read(ip, startoffset_fsb, 1,
1312 &imap, &nimap, 0);
1313 if (error)
1314 goto out_unlock_iolock;
1315 ASSERT(nimap == 0 || nimap == 1);
1316 if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
1317 xfs_daddr_t block;
1318
1319 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
1320 block = imap.br_startblock;
1321 mod = do_div(block, mp->m_sb.sb_rextsize);
1322 if (mod)
1323 startoffset_fsb += mp->m_sb.sb_rextsize - mod;
1324 }
1325 nimap = 1;
1326 error = xfs_bmapi_read(ip, endoffset_fsb - 1, 1,
1327 &imap, &nimap, 0);
1328 if (error)
1329 goto out_unlock_iolock;
1330 ASSERT(nimap == 0 || nimap == 1);
1331 if (nimap && imap.br_startblock != HOLESTARTBLOCK) {
1332 ASSERT(imap.br_startblock != DELAYSTARTBLOCK);
1333 mod++;
1334 if (mod && (mod != mp->m_sb.sb_rextsize))
1335 endoffset_fsb -= mod;
1336 }
1337 }
1338 if ((done = (endoffset_fsb <= startoffset_fsb)))
1339
1340
1341
1342 error = xfs_zero_remaining_bytes(ip, offset, offset + len - 1);
1343 else {
1344
1345
1346
1347 if (offset < XFS_FSB_TO_B(mp, startoffset_fsb))
1348 error = xfs_zero_remaining_bytes(ip, offset,
1349 XFS_FSB_TO_B(mp, startoffset_fsb) - 1);
1350 if (!error &&
1351 XFS_FSB_TO_B(mp, endoffset_fsb) < offset + len)
1352 error = xfs_zero_remaining_bytes(ip,
1353 XFS_FSB_TO_B(mp, endoffset_fsb),
1354 offset + len - 1);
1355 }
1356
1357
1358
1359
1360 resblks = XFS_DIOSTRAT_SPACE_RES(mp, 0);
1361 while (!error && !done) {
1362
1363
1364
1365
1366
1367
1368 tp = xfs_trans_alloc(mp, XFS_TRANS_DIOSTRAT);
1369 tp->t_flags |= XFS_TRANS_RESERVE;
1370 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_write, resblks, 0);
1371
1372
1373
1374
1375 if (error) {
1376
1377
1378
1379 ASSERT(error == ENOSPC || XFS_FORCED_SHUTDOWN(mp));
1380 xfs_trans_cancel(tp, 0);
1381 break;
1382 }
1383 xfs_ilock(ip, XFS_ILOCK_EXCL);
1384 error = xfs_trans_reserve_quota(tp, mp,
1385 ip->i_udquot, ip->i_gdquot, ip->i_pdquot,
1386 resblks, 0, XFS_QMOPT_RES_REGBLKS);
1387 if (error)
1388 goto error1;
1389
1390 xfs_trans_ijoin(tp, ip, 0);
1391
1392
1393
1394
1395 xfs_bmap_init(&free_list, &firstfsb);
1396 error = xfs_bunmapi(tp, ip, startoffset_fsb,
1397 endoffset_fsb - startoffset_fsb,
1398 0, 2, &firstfsb, &free_list, &done);
1399 if (error) {
1400 goto error0;
1401 }
1402
1403
1404
1405
1406 error = xfs_bmap_finish(&tp, &free_list, &committed);
1407 if (error) {
1408 goto error0;
1409 }
1410
1411 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
1412 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1413 }
1414
1415 out_unlock_iolock:
1416 if (need_iolock)
1417 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1418 return error;
1419
1420 error0:
1421 xfs_bmap_cancel(&free_list);
1422 error1:
1423 xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT);
1424 xfs_iunlock(ip, need_iolock ? (XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL) :
1425 XFS_ILOCK_EXCL);
1426 return error;
1427}
1428
1429
1430STATIC int
1431xfs_zero_file_space(
1432 struct xfs_inode *ip,
1433 xfs_off_t offset,
1434 xfs_off_t len,
1435 int attr_flags)
1436{
1437 struct xfs_mount *mp = ip->i_mount;
1438 uint granularity;
1439 xfs_off_t start_boundary;
1440 xfs_off_t end_boundary;
1441 int error;
1442
1443 granularity = max_t(uint, 1 << mp->m_sb.sb_blocklog, PAGE_CACHE_SIZE);
1444
1445
1446
1447
1448
1449
1450 start_boundary = round_up(offset, granularity);
1451 end_boundary = round_down(offset + len, granularity);
1452
1453 ASSERT(start_boundary >= offset);
1454 ASSERT(end_boundary <= offset + len);
1455
1456 if (!(attr_flags & XFS_ATTR_NOLOCK))
1457 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1458
1459 if (start_boundary < end_boundary - 1) {
1460
1461 truncate_pagecache_range(VFS_I(ip), start_boundary,
1462 end_boundary - 1);
1463
1464 error = xfs_alloc_file_space(ip, start_boundary,
1465 end_boundary - start_boundary - 1,
1466 XFS_BMAPI_PREALLOC | XFS_BMAPI_CONVERT,
1467 attr_flags);
1468 if (error)
1469 goto out_unlock;
1470
1471
1472 if (start_boundary != offset)
1473 error = xfs_iozero(ip, offset, start_boundary - offset);
1474 if (error)
1475 goto out_unlock;
1476
1477 if (end_boundary != offset + len)
1478 error = xfs_iozero(ip, end_boundary,
1479 offset + len - end_boundary);
1480
1481 } else {
1482
1483
1484
1485
1486 error = xfs_iozero(ip, offset, len);
1487 }
1488
1489out_unlock:
1490 if (!(attr_flags & XFS_ATTR_NOLOCK))
1491 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1492 return error;
1493
1494}
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507int
1508xfs_change_file_space(
1509 xfs_inode_t *ip,
1510 int cmd,
1511 xfs_flock64_t *bf,
1512 xfs_off_t offset,
1513 int attr_flags)
1514{
1515 xfs_mount_t *mp = ip->i_mount;
1516 int clrprealloc;
1517 int error;
1518 xfs_fsize_t fsize;
1519 int setprealloc;
1520 xfs_off_t startoffset;
1521 xfs_trans_t *tp;
1522 struct iattr iattr;
1523
1524 if (!S_ISREG(ip->i_d.di_mode))
1525 return XFS_ERROR(EINVAL);
1526
1527 switch (bf->l_whence) {
1528 case 0:
1529 break;
1530 case 1:
1531 bf->l_start += offset;
1532 break;
1533 case 2:
1534 bf->l_start += XFS_ISIZE(ip);
1535 break;
1536 default:
1537 return XFS_ERROR(EINVAL);
1538 }
1539
1540
1541
1542
1543
1544
1545
1546 switch (cmd) {
1547 case XFS_IOC_ZERO_RANGE:
1548 case XFS_IOC_RESVSP:
1549 case XFS_IOC_RESVSP64:
1550 case XFS_IOC_UNRESVSP:
1551 case XFS_IOC_UNRESVSP64:
1552 if (bf->l_len <= 0)
1553 return XFS_ERROR(EINVAL);
1554 break;
1555 default:
1556 bf->l_len = 0;
1557 break;
1558 }
1559
1560 if (bf->l_start < 0 ||
1561 bf->l_start > mp->m_super->s_maxbytes ||
1562 bf->l_start + bf->l_len < 0 ||
1563 bf->l_start + bf->l_len >= mp->m_super->s_maxbytes)
1564 return XFS_ERROR(EINVAL);
1565
1566 bf->l_whence = 0;
1567
1568 startoffset = bf->l_start;
1569 fsize = XFS_ISIZE(ip);
1570
1571 setprealloc = clrprealloc = 0;
1572 switch (cmd) {
1573 case XFS_IOC_ZERO_RANGE:
1574 error = xfs_zero_file_space(ip, startoffset, bf->l_len,
1575 attr_flags);
1576 if (error)
1577 return error;
1578 setprealloc = 1;
1579 break;
1580
1581 case XFS_IOC_RESVSP:
1582 case XFS_IOC_RESVSP64:
1583 error = xfs_alloc_file_space(ip, startoffset, bf->l_len,
1584 XFS_BMAPI_PREALLOC, attr_flags);
1585 if (error)
1586 return error;
1587 setprealloc = 1;
1588 break;
1589
1590 case XFS_IOC_UNRESVSP:
1591 case XFS_IOC_UNRESVSP64:
1592 if ((error = xfs_free_file_space(ip, startoffset, bf->l_len,
1593 attr_flags)))
1594 return error;
1595 break;
1596
1597 case XFS_IOC_ALLOCSP:
1598 case XFS_IOC_ALLOCSP64:
1599 case XFS_IOC_FREESP:
1600 case XFS_IOC_FREESP64:
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611 xfs_ilock(ip, XFS_IOLOCK_EXCL);
1612 if (startoffset > fsize) {
1613 error = xfs_alloc_file_space(ip, fsize,
1614 startoffset - fsize, 0,
1615 attr_flags | XFS_ATTR_NOLOCK);
1616 if (error) {
1617 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1618 break;
1619 }
1620 }
1621
1622 iattr.ia_valid = ATTR_SIZE;
1623 iattr.ia_size = startoffset;
1624
1625 error = xfs_setattr_size(ip, &iattr,
1626 attr_flags | XFS_ATTR_NOLOCK);
1627 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1628
1629 if (error)
1630 return error;
1631
1632 clrprealloc = 1;
1633 break;
1634
1635 default:
1636 ASSERT(0);
1637 return XFS_ERROR(EINVAL);
1638 }
1639
1640
1641
1642
1643 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID);
1644 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0);
1645 if (error) {
1646 xfs_trans_cancel(tp, 0);
1647 return error;
1648 }
1649
1650 xfs_ilock(ip, XFS_ILOCK_EXCL);
1651 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
1652
1653 if ((attr_flags & XFS_ATTR_DMI) == 0) {
1654 ip->i_d.di_mode &= ~S_ISUID;
1655
1656
1657
1658
1659
1660
1661
1662
1663 if (ip->i_d.di_mode & S_IXGRP)
1664 ip->i_d.di_mode &= ~S_ISGID;
1665
1666 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
1667 }
1668 if (setprealloc)
1669 ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
1670 else if (clrprealloc)
1671 ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC;
1672
1673 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
1674 if (attr_flags & XFS_ATTR_SYNC)
1675 xfs_trans_set_sync(tp);
1676 return xfs_trans_commit(tp, 0);
1677}
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699static int
1700xfs_swap_extents_check_format(
1701 xfs_inode_t *ip,
1702 xfs_inode_t *tip)
1703{
1704
1705
1706 if (ip->i_d.di_format == XFS_DINODE_FMT_LOCAL ||
1707 tip->i_d.di_format == XFS_DINODE_FMT_LOCAL)
1708 return EINVAL;
1709
1710
1711
1712
1713
1714 if (ip->i_d.di_nextents < tip->i_d.di_nextents)
1715 return EINVAL;
1716
1717
1718
1719
1720
1721
1722 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1723 tip->i_d.di_format == XFS_DINODE_FMT_BTREE)
1724 return EINVAL;
1725
1726
1727 if (tip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1728 XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) >
1729 XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK))
1730 return EINVAL;
1731
1732
1733 if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS &&
1734 XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) >
1735 XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK))
1736 return EINVAL;
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747 if (tip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
1748 if (XFS_IFORK_BOFF(ip) &&
1749 XFS_BMAP_BMDR_SPACE(tip->i_df.if_broot) > XFS_IFORK_BOFF(ip))
1750 return EINVAL;
1751 if (XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) <=
1752 XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK))
1753 return EINVAL;
1754 }
1755
1756
1757 if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
1758 if (XFS_IFORK_BOFF(tip) &&
1759 XFS_BMAP_BMDR_SPACE(ip->i_df.if_broot) > XFS_IFORK_BOFF(tip))
1760 return EINVAL;
1761 if (XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) <=
1762 XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK))
1763 return EINVAL;
1764 }
1765
1766 return 0;
1767}
1768
1769int
1770xfs_swap_extents(
1771 xfs_inode_t *ip,
1772 xfs_inode_t *tip,
1773 xfs_swapext_t *sxp)
1774{
1775 xfs_mount_t *mp = ip->i_mount;
1776 xfs_trans_t *tp;
1777 xfs_bstat_t *sbp = &sxp->sx_stat;
1778 xfs_ifork_t *tempifp, *ifp, *tifp;
1779 int src_log_flags, target_log_flags;
1780 int error = 0;
1781 int aforkblks = 0;
1782 int taforkblks = 0;
1783 __uint64_t tmp;
1784
1785 tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL);
1786 if (!tempifp) {
1787 error = XFS_ERROR(ENOMEM);
1788 goto out;
1789 }
1790
1791
1792
1793
1794
1795
1796
1797 xfs_lock_two_inodes(ip, tip, XFS_IOLOCK_EXCL);
1798 xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL);
1799
1800
1801 if ((ip->i_d.di_mode & S_IFMT) != (tip->i_d.di_mode & S_IFMT)) {
1802 error = XFS_ERROR(EINVAL);
1803 goto out_unlock;
1804 }
1805
1806
1807 if (XFS_IS_REALTIME_INODE(ip) != XFS_IS_REALTIME_INODE(tip)) {
1808 error = XFS_ERROR(EINVAL);
1809 goto out_unlock;
1810 }
1811
1812 error = -filemap_write_and_wait(VFS_I(tip)->i_mapping);
1813 if (error)
1814 goto out_unlock;
1815 truncate_pagecache_range(VFS_I(tip), 0, -1);
1816
1817
1818 if (VN_CACHED(VFS_I(tip)) != 0) {
1819 error = XFS_ERROR(EINVAL);
1820 goto out_unlock;
1821 }
1822
1823
1824 if (sxp->sx_offset != 0 ||
1825 sxp->sx_length != ip->i_d.di_size ||
1826 sxp->sx_length != tip->i_d.di_size) {
1827 error = XFS_ERROR(EFAULT);
1828 goto out_unlock;
1829 }
1830
1831 trace_xfs_swap_extent_before(ip, 0);
1832 trace_xfs_swap_extent_before(tip, 1);
1833
1834
1835 error = xfs_swap_extents_check_format(ip, tip);
1836 if (error) {
1837 xfs_notice(mp,
1838 "%s: inode 0x%llx format is incompatible for exchanging.",
1839 __func__, ip->i_ino);
1840 goto out_unlock;
1841 }
1842
1843
1844
1845
1846
1847
1848
1849
1850 if ((sbp->bs_ctime.tv_sec != VFS_I(ip)->i_ctime.tv_sec) ||
1851 (sbp->bs_ctime.tv_nsec != VFS_I(ip)->i_ctime.tv_nsec) ||
1852 (sbp->bs_mtime.tv_sec != VFS_I(ip)->i_mtime.tv_sec) ||
1853 (sbp->bs_mtime.tv_nsec != VFS_I(ip)->i_mtime.tv_nsec)) {
1854 error = XFS_ERROR(EBUSY);
1855 goto out_unlock;
1856 }
1857
1858
1859
1860
1861
1862
1863
1864 if (VN_MAPPED(VFS_I(ip))) {
1865 error = XFS_ERROR(EBUSY);
1866 goto out_unlock;
1867 }
1868
1869 xfs_iunlock(ip, XFS_ILOCK_EXCL);
1870 xfs_iunlock(tip, XFS_ILOCK_EXCL);
1871
1872
1873
1874
1875
1876
1877
1878
1879 truncate_pagecache_range(VFS_I(ip), 0, -1);
1880
1881 tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT);
1882 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
1883 if (error) {
1884 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
1885 xfs_iunlock(tip, XFS_IOLOCK_EXCL);
1886 xfs_trans_cancel(tp, 0);
1887 goto out;
1888 }
1889 xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL);
1890
1891
1892
1893
1894 if ( ((XFS_IFORK_Q(ip) != 0) && (ip->i_d.di_anextents > 0)) &&
1895 (ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) {
1896 error = xfs_bmap_count_blocks(tp, ip, XFS_ATTR_FORK, &aforkblks);
1897 if (error)
1898 goto out_trans_cancel;
1899 }
1900 if ( ((XFS_IFORK_Q(tip) != 0) && (tip->i_d.di_anextents > 0)) &&
1901 (tip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) {
1902 error = xfs_bmap_count_blocks(tp, tip, XFS_ATTR_FORK,
1903 &taforkblks);
1904 if (error)
1905 goto out_trans_cancel;
1906 }
1907
1908 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1909 xfs_trans_ijoin(tp, tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924 src_log_flags = XFS_ILOG_CORE;
1925 target_log_flags = XFS_ILOG_CORE;
1926 if (ip->i_d.di_version == 3 &&
1927 ip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
1928 target_log_flags |= XFS_ILOG_DOWNER;
1929 error = xfs_bmbt_change_owner(tp, ip, XFS_DATA_FORK,
1930 tip->i_ino, NULL);
1931 if (error)
1932 goto out_trans_cancel;
1933 }
1934
1935 if (tip->i_d.di_version == 3 &&
1936 tip->i_d.di_format == XFS_DINODE_FMT_BTREE) {
1937 src_log_flags |= XFS_ILOG_DOWNER;
1938 error = xfs_bmbt_change_owner(tp, tip, XFS_DATA_FORK,
1939 ip->i_ino, NULL);
1940 if (error)
1941 goto out_trans_cancel;
1942 }
1943
1944
1945
1946
1947 ifp = &ip->i_df;
1948 tifp = &tip->i_df;
1949 *tempifp = *ifp;
1950 *ifp = *tifp;
1951 *tifp = *tempifp;
1952
1953
1954
1955
1956 tmp = (__uint64_t)ip->i_d.di_nblocks;
1957 ip->i_d.di_nblocks = tip->i_d.di_nblocks - taforkblks + aforkblks;
1958 tip->i_d.di_nblocks = tmp + taforkblks - aforkblks;
1959
1960 tmp = (__uint64_t) ip->i_d.di_nextents;
1961 ip->i_d.di_nextents = tip->i_d.di_nextents;
1962 tip->i_d.di_nextents = tmp;
1963
1964 tmp = (__uint64_t) ip->i_d.di_format;
1965 ip->i_d.di_format = tip->i_d.di_format;
1966 tip->i_d.di_format = tmp;
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977 ASSERT(tip->i_delayed_blks == 0);
1978 tip->i_delayed_blks = ip->i_delayed_blks;
1979 ip->i_delayed_blks = 0;
1980
1981 switch (ip->i_d.di_format) {
1982 case XFS_DINODE_FMT_EXTENTS:
1983
1984
1985
1986
1987 if (ip->i_d.di_nextents <= XFS_INLINE_EXTS) {
1988 ifp->if_u1.if_extents =
1989 ifp->if_u2.if_inline_ext;
1990 }
1991 src_log_flags |= XFS_ILOG_DEXT;
1992 break;
1993 case XFS_DINODE_FMT_BTREE:
1994 ASSERT(ip->i_d.di_version < 3 ||
1995 (src_log_flags & XFS_ILOG_DOWNER));
1996 src_log_flags |= XFS_ILOG_DBROOT;
1997 break;
1998 }
1999
2000 switch (tip->i_d.di_format) {
2001 case XFS_DINODE_FMT_EXTENTS:
2002
2003
2004
2005
2006 if (tip->i_d.di_nextents <= XFS_INLINE_EXTS) {
2007 tifp->if_u1.if_extents =
2008 tifp->if_u2.if_inline_ext;
2009 }
2010 target_log_flags |= XFS_ILOG_DEXT;
2011 break;
2012 case XFS_DINODE_FMT_BTREE:
2013 target_log_flags |= XFS_ILOG_DBROOT;
2014 ASSERT(tip->i_d.di_version < 3 ||
2015 (target_log_flags & XFS_ILOG_DOWNER));
2016 break;
2017 }
2018
2019 xfs_trans_log_inode(tp, ip, src_log_flags);
2020 xfs_trans_log_inode(tp, tip, target_log_flags);
2021
2022
2023
2024
2025
2026 if (mp->m_flags & XFS_MOUNT_WSYNC)
2027 xfs_trans_set_sync(tp);
2028
2029 error = xfs_trans_commit(tp, 0);
2030
2031 trace_xfs_swap_extent_after(ip, 0);
2032 trace_xfs_swap_extent_after(tip, 1);
2033out:
2034 kmem_free(tempifp);
2035 return error;
2036
2037out_unlock:
2038 xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
2039 xfs_iunlock(tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
2040 goto out;
2041
2042out_trans_cancel:
2043 xfs_trans_cancel(tp, 0);
2044 goto out_unlock;
2045}
2046