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[GFS2] Move some fields around to reduce wasted space
[net-next-2.6.git] / fs / gfs2 / eattr.c
CommitLineData
b3b94faa
DT		 1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3a8a9a10 3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
b3b94faa
DT		 4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License v.2.
8 */
9
10#include <linux/sched.h>
11#include <linux/slab.h>
12#include <linux/spinlock.h>
13#include <linux/completion.h>
14#include <linux/buffer_head.h>
15#include <linux/xattr.h>
5c676f6d 16#include <linux/gfs2_ondisk.h>
b3b94faa
DT		 17#include <asm/uaccess.h>
18
19#include "gfs2.h"
5c676f6d
SW		 20#include "lm_interface.h"
21#include "incore.h"
b3b94faa
DT		 22#include "acl.h"
23#include "eaops.h"
24#include "eattr.h"
25#include "glock.h"
26#include "inode.h"
27#include "meta_io.h"
28#include "quota.h"
29#include "rgrp.h"
30#include "trans.h"
5c676f6d 31#include "util.h"
b3b94faa
DT		 32
33/**
34 * ea_calc_size - returns the acutal number of bytes the request will take up
35 * (not counting any unstuffed data blocks)
36 * @sdp:
37 * @er:
38 * @size:
39 *
40 * Returns: 1 if the EA should be stuffed
41 */
42
43static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
44 unsigned int *size)
45{
46 *size = GFS2_EAREQ_SIZE_STUFFED(er);
47 if (*size <= sdp->sd_jbsize)
48 return 1;
49
50 *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
51
52 return 0;
53}
54
55static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
56{
57 unsigned int size;
58
59 if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
60 return -ERANGE;
61
62 ea_calc_size(sdp, er, &size);
63
64 /* This can only happen with 512 byte blocks */
65 if (size > sdp->sd_jbsize)
66 return -ERANGE;
67
68 return 0;
69}
70
71typedef int (*ea_call_t) (struct gfs2_inode *ip,
72 struct buffer_head *bh,
73 struct gfs2_ea_header *ea,
74 struct gfs2_ea_header *prev,
75 void *private);
76
77static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
78 ea_call_t ea_call, void *data)
79{
80 struct gfs2_ea_header *ea, *prev = NULL;
81 int error = 0;
82
83 if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA))
84 return -EIO;
85
86 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
87 if (!GFS2_EA_REC_LEN(ea))
88 goto fail;
89 if (!(bh->b_data <= (char *)ea &&
90 (char *)GFS2_EA2NEXT(ea) <=
91 bh->b_data + bh->b_size))
92 goto fail;
93 if (!GFS2_EATYPE_VALID(ea->ea_type))
94 goto fail;
95
96 error = ea_call(ip, bh, ea, prev, data);
97 if (error)
98 return error;
99
100 if (GFS2_EA_IS_LAST(ea)) {
101 if ((char *)GFS2_EA2NEXT(ea) !=
102 bh->b_data + bh->b_size)
103 goto fail;
104 break;
105 }
106 }
107
108 return error;
109
110 fail:
111 gfs2_consist_inode(ip);
112 return -EIO;
113}
114
115static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
116{
117 struct buffer_head *bh, *eabh;
118 uint64_t *eablk, *end;
119 int error;
120
121 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
122 DIO_START | DIO_WAIT, &bh);
123 if (error)
124 return error;
125
126 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
127 error = ea_foreach_i(ip, bh, ea_call, data);
128 goto out;
129 }
130
131 if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
132 error = -EIO;
133 goto out;
134 }
135
136 eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
137 end = eablk + ip->i_sbd->sd_inptrs;
138
139 for (; eablk < end; eablk++) {
140 uint64_t bn;
141
142 if (!*eablk)
143 break;
144 bn = be64_to_cpu(*eablk);
145
146 error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT,
147 &eabh);
148 if (error)
149 break;
150 error = ea_foreach_i(ip, eabh, ea_call, data);
151 brelse(eabh);
152 if (error)
153 break;
154 }
155 out:
156 brelse(bh);
157
158 return error;
159}
160
161struct ea_find {
162 struct gfs2_ea_request *ef_er;
163 struct gfs2_ea_location *ef_el;
164};
165
166static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
167 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
168 void *private)
169{
170 struct ea_find *ef = private;
171 struct gfs2_ea_request *er = ef->ef_er;
172
173 if (ea->ea_type == GFS2_EATYPE_UNUSED)
174 return 0;
175
176 if (ea->ea_type == er->er_type) {
177 if (ea->ea_name_len == er->er_name_len &&
178 !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
179 struct gfs2_ea_location *el = ef->ef_el;
180 get_bh(bh);
181 el->el_bh = bh;
182 el->el_ea = ea;
183 el->el_prev = prev;
184 return 1;
185 }
186 }
187
188#if 0
189 else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) &&
190 er->er_type == GFS2_EATYPE_SYS)
191 return 1;
192#endif
193
194 return 0;
195}
196
197int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
198 struct gfs2_ea_location *el)
199{
200 struct ea_find ef;
201 int error;
202
203 ef.ef_er = er;
204 ef.ef_el = el;
205
206 memset(el, 0, sizeof(struct gfs2_ea_location));
207
208 error = ea_foreach(ip, ea_find_i, &ef);
209 if (error > 0)
210 return 0;
211
212 return error;
213}
214
215/**
216 * ea_dealloc_unstuffed -
217 * @ip:
218 * @bh:
219 * @ea:
220 * @prev:
221 * @private:
222 *
223 * Take advantage of the fact that all unstuffed blocks are
224 * allocated from the same RG. But watch, this may not always
225 * be true.
226 *
227 * Returns: errno
228 */
229
230static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
231 struct gfs2_ea_header *ea,
232 struct gfs2_ea_header *prev, void *private)
233{
234 int *leave = private;
235 struct gfs2_sbd *sdp = ip->i_sbd;
236 struct gfs2_rgrpd *rgd;
237 struct gfs2_holder rg_gh;
238 struct buffer_head *dibh;
239 uint64_t *dataptrs, bn = 0;
240 uint64_t bstart = 0;
241 unsigned int blen = 0;
242 unsigned int blks = 0;
243 unsigned int x;
244 int error;
245
246 if (GFS2_EA_IS_STUFFED(ea))
247 return 0;
248
249 dataptrs = GFS2_EA2DATAPTRS(ea);
250 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
251 if (*dataptrs) {
252 blks++;
253 bn = be64_to_cpu(*dataptrs);
254 }
255 if (!blks)
256 return 0;
257
258 rgd = gfs2_blk2rgrpd(sdp, bn);
259 if (!rgd) {
260 gfs2_consist_inode(ip);
261 return -EIO;
262 }
263
264 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
265 if (error)
266 return error;
267
268 error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length +
269 RES_DINODE + RES_EATTR + RES_STATFS +
270 RES_QUOTA, blks);
271 if (error)
272 goto out_gunlock;
273
d4e9c4c3 274 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 275
276 dataptrs = GFS2_EA2DATAPTRS(ea);
277 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
278 if (!*dataptrs)
279 break;
280 bn = be64_to_cpu(*dataptrs);
281
282 if (bstart + blen == bn)
283 blen++;
284 else {
285 if (bstart)
286 gfs2_free_meta(ip, bstart, blen);
287 bstart = bn;
288 blen = 1;
289 }
290
291 *dataptrs = 0;
292 if (!ip->i_di.di_blocks)
293 gfs2_consist_inode(ip);
294 ip->i_di.di_blocks--;
295 }
296 if (bstart)
297 gfs2_free_meta(ip, bstart, blen);
298
299 if (prev && !leave) {
300 uint32_t len;
301
302 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
303 prev->ea_rec_len = cpu_to_be32(len);
304
305 if (GFS2_EA_IS_LAST(ea))
306 prev->ea_flags |= GFS2_EAFLAG_LAST;
307 } else {
308 ea->ea_type = GFS2_EATYPE_UNUSED;
309 ea->ea_num_ptrs = 0;
310 }
311
312 error = gfs2_meta_inode_buffer(ip, &dibh);
313 if (!error) {
314 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 315 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 316 gfs2_dinode_out(&ip->i_di, dibh->b_data);
317 brelse(dibh);
318 }
319
320 gfs2_trans_end(sdp);
321
322 out_gunlock:
323 gfs2_glock_dq_uninit(&rg_gh);
324
325 return error;
326}
327
328static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
329 struct gfs2_ea_header *ea,
330 struct gfs2_ea_header *prev, int leave)
331{
332 struct gfs2_alloc *al;
333 int error;
334
335 al = gfs2_alloc_get(ip);
336
337 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
338 if (error)
339 goto out_alloc;
340
341 error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
342 if (error)
343 goto out_quota;
344
345 error = ea_dealloc_unstuffed(ip,
346 bh, ea, prev,
347 (leave) ? &error : NULL);
348
349 gfs2_glock_dq_uninit(&al->al_ri_gh);
350
351 out_quota:
352 gfs2_quota_unhold(ip);
353
354 out_alloc:
355 gfs2_alloc_put(ip);
356
357 return error;
358}
359
b3b94faa
DT		 360struct ea_list {
361 struct gfs2_ea_request *ei_er;
362 unsigned int ei_size;
363};
364
365static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
366 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
367 void *private)
368{
369 struct ea_list *ei = private;
370 struct gfs2_ea_request *er = ei->ei_er;
639b6d79 371 unsigned int ea_size = gfs2_ea_strlen(ea);
b3b94faa
DT		 372
373 if (ea->ea_type == GFS2_EATYPE_UNUSED)
374 return 0;
375
376 if (er->er_data_len) {
377 char *prefix;
378 unsigned int l;
379 char c = 0;
380
381 if (ei->ei_size + ea_size > er->er_data_len)
382 return -ERANGE;
383
639b6d79
RH		 384 switch (ea->ea_type) {
385 case GFS2_EATYPE_USR:
b3b94faa
DT		 386 prefix = "user.";
387 l = 5;
639b6d79
RH		 388 break;
389 case GFS2_EATYPE_SYS:
b3b94faa
DT		 390 prefix = "system.";
391 l = 7;
639b6d79
RH		 392 break;
393 case GFS2_EATYPE_SECURITY:
394 prefix = "security.";
395 l = 9;
396 break;
397 default:
90cdd208 398 /* FIXME: Needs looking at again */
639b6d79 399 break;
b3b94faa
DT		 400 }
401
90cdd208
SW		 402 memcpy(er->er_data + ei->ei_size, prefix, l);
403 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
b3b94faa 404 ea->ea_name_len);
90cdd208 405 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
b3b94faa
DT		 406 }
407
408 ei->ei_size += ea_size;
409
410 return 0;
411}
412
413/**
414 * gfs2_ea_list -
415 * @ip:
416 * @er:
417 *
418 * Returns: actual size of data on success, -errno on error
419 */
420
421int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
422{
423 struct gfs2_holder i_gh;
424 int error;
425
426 if (!er->er_data || !er->er_data_len) {
427 er->er_data = NULL;
428 er->er_data_len = 0;
429 }
430
431 error = gfs2_glock_nq_init(ip->i_gl,
432 LM_ST_SHARED, LM_FLAG_ANY,
433 &i_gh);
434 if (error)
435 return error;
436
437 if (ip->i_di.di_eattr) {
438 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
439
440 error = ea_foreach(ip, ea_list_i, &ei);
441 if (!error)
442 error = ei.ei_size;
443 }
444
445 gfs2_glock_dq_uninit(&i_gh);
446
447 return error;
448}
449
450/**
451 * ea_get_unstuffed - actually copies the unstuffed data into the
452 * request buffer
453 * @ip:
454 * @ea:
455 * @data:
456 *
457 * Returns: errno
458 */
459
460static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
461 char *data)
462{
463 struct gfs2_sbd *sdp = ip->i_sbd;
464 struct buffer_head **bh;
465 unsigned int amount = GFS2_EA_DATA_LEN(ea);
5c676f6d 466 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
b3b94faa
DT		 467 uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
468 unsigned int x;
469 int error = 0;
470
471 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
472 if (!bh)
473 return -ENOMEM;
474
475 for (x = 0; x < nptrs; x++) {
476 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
477 DIO_START, bh + x);
478 if (error) {
479 while (x--)
480 brelse(bh[x]);
481 goto out;
482 }
483 dataptrs++;
484 }
485
486 for (x = 0; x < nptrs; x++) {
487 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
488 if (error) {
489 for (; x < nptrs; x++)
490 brelse(bh[x]);
491 goto out;
492 }
493 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
494 for (; x < nptrs; x++)
495 brelse(bh[x]);
496 error = -EIO;
497 goto out;
498 }
499
500 memcpy(data,
501 bh[x]->b_data + sizeof(struct gfs2_meta_header),
502 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
503
504 amount -= sdp->sd_jbsize;
505 data += sdp->sd_jbsize;
506
507 brelse(bh[x]);
508 }
509
510 out:
511 kfree(bh);
512
513 return error;
514}
515
516int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
517 char *data)
518{
519 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
520 memcpy(data,
521 GFS2_EA2DATA(el->el_ea),
522 GFS2_EA_DATA_LEN(el->el_ea));
523 return 0;
524 } else
525 return ea_get_unstuffed(ip, el->el_ea, data);
526}
527
528/**
529 * gfs2_ea_get_i -
530 * @ip:
531 * @er:
532 *
533 * Returns: actual size of data on success, -errno on error
534 */
535
536int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
537{
538 struct gfs2_ea_location el;
539 int error;
540
541 if (!ip->i_di.di_eattr)
542 return -ENODATA;
543
544 error = gfs2_ea_find(ip, er, &el);
545 if (error)
546 return error;
547 if (!el.el_ea)
548 return -ENODATA;
549
550 if (er->er_data_len) {
551 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
552 error = -ERANGE;
553 else
554 error = gfs2_ea_get_copy(ip, &el, er->er_data);
555 }
556 if (!error)
557 error = GFS2_EA_DATA_LEN(el.el_ea);
558
559 brelse(el.el_bh);
560
561 return error;
562}
563
564/**
565 * gfs2_ea_get -
566 * @ip:
567 * @er:
568 *
569 * Returns: actual size of data on success, -errno on error
570 */
571
572int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
573{
574 struct gfs2_holder i_gh;
575 int error;
576
577 if (!er->er_name_len ||
578 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
579 return -EINVAL;
580 if (!er->er_data || !er->er_data_len) {
581 er->er_data = NULL;
582 er->er_data_len = 0;
583 }
584
585 error = gfs2_glock_nq_init(ip->i_gl,
586 LM_ST_SHARED, LM_FLAG_ANY,
587 &i_gh);
588 if (error)
589 return error;
590
591 error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
592
593 gfs2_glock_dq_uninit(&i_gh);
594
595 return error;
596}
597
598/**
599 * ea_alloc_blk - allocates a new block for extended attributes.
600 * @ip: A pointer to the inode that's getting extended attributes
601 * @bhp:
602 *
603 * Returns: errno
604 */
605
606static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
607{
608 struct gfs2_sbd *sdp = ip->i_sbd;
609 struct gfs2_ea_header *ea;
610 uint64_t block;
611
612 block = gfs2_alloc_meta(ip);
613
614 *bhp = gfs2_meta_new(ip->i_gl, block);
d4e9c4c3 615 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
b3b94faa
DT		 616 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
617 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
618
619 ea = GFS2_EA_BH2FIRST(*bhp);
620 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
621 ea->ea_type = GFS2_EATYPE_UNUSED;
622 ea->ea_flags = GFS2_EAFLAG_LAST;
623 ea->ea_num_ptrs = 0;
624
625 ip->i_di.di_blocks++;
626
627 return 0;
628}
629
630/**
631 * ea_write - writes the request info to an ea, creating new blocks if
632 * necessary
633 * @ip: inode that is being modified
634 * @ea: the location of the new ea in a block
635 * @er: the write request
636 *
637 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
638 *
639 * returns : errno
640 */
641
642static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
643 struct gfs2_ea_request *er)
644{
645 struct gfs2_sbd *sdp = ip->i_sbd;
646
647 ea->ea_data_len = cpu_to_be32(er->er_data_len);
648 ea->ea_name_len = er->er_name_len;
649 ea->ea_type = er->er_type;
650 ea->__pad = 0;
651
652 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
653
654 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
655 ea->ea_num_ptrs = 0;
656 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
657 } else {
658 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
659 const char *data = er->er_data;
660 unsigned int data_len = er->er_data_len;
661 unsigned int copy;
662 unsigned int x;
663
5c676f6d 664 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
b3b94faa
DT		 665 for (x = 0; x < ea->ea_num_ptrs; x++) {
666 struct buffer_head *bh;
667 uint64_t block;
668 int mh_size = sizeof(struct gfs2_meta_header);
669
670 block = gfs2_alloc_meta(ip);
671
672 bh = gfs2_meta_new(ip->i_gl, block);
d4e9c4c3 673 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 674 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
675
676 ip->i_di.di_blocks++;
677
678 copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
679 data_len;
680 memcpy(bh->b_data + mh_size, data, copy);
681 if (copy < sdp->sd_jbsize)
682 memset(bh->b_data + mh_size + copy, 0,
683 sdp->sd_jbsize - copy);
684
685 *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
686 data += copy;
687 data_len -= copy;
688
689 brelse(bh);
690 }
691
692 gfs2_assert_withdraw(sdp, !data_len);
693 }
694
695 return 0;
696}
697
698typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
699 struct gfs2_ea_request *er,
700 void *private);
701
702static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
703 unsigned int blks,
704 ea_skeleton_call_t skeleton_call,
705 void *private)
706{
707 struct gfs2_alloc *al;
708 struct buffer_head *dibh;
709 int error;
710
711 al = gfs2_alloc_get(ip);
712
713 error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
714 if (error)
715 goto out;
716
717 error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
718 if (error)
719 goto out_gunlock_q;
720
721 al->al_requested = blks;
722
723 error = gfs2_inplace_reserve(ip);
724 if (error)
725 goto out_gunlock_q;
726
727 error = gfs2_trans_begin(ip->i_sbd,
728 blks + al->al_rgd->rd_ri.ri_length +
729 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
730 if (error)
731 goto out_ipres;
732
733 error = skeleton_call(ip, er, private);
734 if (error)
735 goto out_end_trans;
736
737 error = gfs2_meta_inode_buffer(ip, &dibh);
738 if (!error) {
739 if (er->er_flags & GFS2_ERF_MODE) {
740 gfs2_assert_withdraw(ip->i_sbd,
741 (ip->i_di.di_mode & S_IFMT) ==
742 (er->er_mode & S_IFMT));
743 ip->i_di.di_mode = er->er_mode;
744 }
745 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 746 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 747 gfs2_dinode_out(&ip->i_di, dibh->b_data);
748 brelse(dibh);
749 }
750
751 out_end_trans:
752 gfs2_trans_end(ip->i_sbd);
753
754 out_ipres:
755 gfs2_inplace_release(ip);
756
757 out_gunlock_q:
758 gfs2_quota_unlock(ip);
759
760 out:
761 gfs2_alloc_put(ip);
762
763 return error;
764}
765
766static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
767 void *private)
768{
769 struct buffer_head *bh;
770 int error;
771
772 error = ea_alloc_blk(ip, &bh);
773 if (error)
774 return error;
775
776 ip->i_di.di_eattr = bh->b_blocknr;
777 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
778
779 brelse(bh);
780
781 return error;
782}
783
784/**
785 * ea_init - initializes a new eattr block
786 * @ip:
787 * @er:
788 *
789 * Returns: errno
790 */
791
792static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
793{
794 unsigned int jbsize = ip->i_sbd->sd_jbsize;
795 unsigned int blks = 1;
796
797 if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
5c676f6d 798 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
b3b94faa
DT		 799
800 return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
801}
802
803static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
804{
805 uint32_t ea_size = GFS2_EA_SIZE(ea);
568f4c96
SW		 806 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
807 ea_size);
b3b94faa
DT		 808 uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
809 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
810
811 ea->ea_rec_len = cpu_to_be32(ea_size);
812 ea->ea_flags ^= last;
813
814 new->ea_rec_len = cpu_to_be32(new_size);
815 new->ea_flags = last;
816
817 return new;
818}
819
820static void ea_set_remove_stuffed(struct gfs2_inode *ip,
821 struct gfs2_ea_location *el)
822{
823 struct gfs2_ea_header *ea = el->el_ea;
824 struct gfs2_ea_header *prev = el->el_prev;
825 uint32_t len;
826
d4e9c4c3 827 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 828
829 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
830 ea->ea_type = GFS2_EATYPE_UNUSED;
831 return;
832 } else if (GFS2_EA2NEXT(prev) != ea) {
833 prev = GFS2_EA2NEXT(prev);
834 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
835 }
836
837 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
838 prev->ea_rec_len = cpu_to_be32(len);
839
840 if (GFS2_EA_IS_LAST(ea))
841 prev->ea_flags |= GFS2_EAFLAG_LAST;
842}
843
844struct ea_set {
845 int ea_split;
846
847 struct gfs2_ea_request *es_er;
848 struct gfs2_ea_location *es_el;
849
850 struct buffer_head *es_bh;
851 struct gfs2_ea_header *es_ea;
852};
853
854static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
855 struct gfs2_ea_header *ea, struct ea_set *es)
856{
857 struct gfs2_ea_request *er = es->es_er;
858 struct buffer_head *dibh;
859 int error;
860
861 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
862 if (error)
863 return error;
864
d4e9c4c3 865 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 866
867 if (es->ea_split)
868 ea = ea_split_ea(ea);
869
870 ea_write(ip, ea, er);
871
872 if (es->es_el)
873 ea_set_remove_stuffed(ip, es->es_el);
874
875 error = gfs2_meta_inode_buffer(ip, &dibh);
876 if (error)
877 goto out;
878
879 if (er->er_flags & GFS2_ERF_MODE) {
880 gfs2_assert_withdraw(ip->i_sbd,
881 (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
882 ip->i_di.di_mode = er->er_mode;
883 }
884 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 885 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 886 gfs2_dinode_out(&ip->i_di, dibh->b_data);
887 brelse(dibh);
888 out:
889 gfs2_trans_end(ip->i_sbd);
890
891 return error;
892}
893
894static int ea_set_simple_alloc(struct gfs2_inode *ip,
895 struct gfs2_ea_request *er, void *private)
896{
897 struct ea_set *es = private;
898 struct gfs2_ea_header *ea = es->es_ea;
899 int error;
900
d4e9c4c3 901 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
b3b94faa
DT		 902
903 if (es->ea_split)
904 ea = ea_split_ea(ea);
905
906 error = ea_write(ip, ea, er);
907 if (error)
908 return error;
909
910 if (es->es_el)
911 ea_set_remove_stuffed(ip, es->es_el);
912
913 return 0;
914}
915
916static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
917 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
918 void *private)
919{
920 struct ea_set *es = private;
921 unsigned int size;
922 int stuffed;
923 int error;
924
925 stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size);
926
927 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
928 if (GFS2_EA_REC_LEN(ea) < size)
929 return 0;
930 if (!GFS2_EA_IS_STUFFED(ea)) {
931 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
932 if (error)
933 return error;
934 }
935 es->ea_split = 0;
936 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
937 es->ea_split = 1;
938 else
939 return 0;
940
941 if (stuffed) {
942 error = ea_set_simple_noalloc(ip, bh, ea, es);
943 if (error)
944 return error;
945 } else {
946 unsigned int blks;
947
948 es->es_bh = bh;
949 es->es_ea = ea;
5c676f6d
SW		 950 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
951 ip->i_sbd->sd_jbsize);
b3b94faa
DT		 952
953 error = ea_alloc_skeleton(ip, es->es_er, blks,
954 ea_set_simple_alloc, es);
955 if (error)
956 return error;
957 }
958
959 return 1;
960}
961
962static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
963 void *private)
964{
965 struct gfs2_sbd *sdp = ip->i_sbd;
966 struct buffer_head *indbh, *newbh;
967 uint64_t *eablk;
968 int error;
969 int mh_size = sizeof(struct gfs2_meta_header);
970
971 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
972 uint64_t *end;
973
974 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
975 DIO_START | DIO_WAIT, &indbh);
976 if (error)
977 return error;
978
979 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
980 error = -EIO;
981 goto out;
982 }
983
984 eablk = (uint64_t *)(indbh->b_data + mh_size);
985 end = eablk + sdp->sd_inptrs;
986
987 for (; eablk < end; eablk++)
988 if (!*eablk)
989 break;
990
991 if (eablk == end) {
992 error = -ENOSPC;
993 goto out;
994 }
995
d4e9c4c3 996 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 997 } else {
998 uint64_t blk;
999
1000 blk = gfs2_alloc_meta(ip);
1001
1002 indbh = gfs2_meta_new(ip->i_gl, blk);
d4e9c4c3 1003 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 1004 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1005 gfs2_buffer_clear_tail(indbh, mh_size);
1006
1007 eablk = (uint64_t *)(indbh->b_data + mh_size);
1008 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1009 ip->i_di.di_eattr = blk;
1010 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1011 ip->i_di.di_blocks++;
1012
1013 eablk++;
1014 }
1015
1016 error = ea_alloc_blk(ip, &newbh);
1017 if (error)
1018 goto out;
1019
1020 *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1021 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1022 brelse(newbh);
1023 if (error)
1024 goto out;
1025
1026 if (private)
1027 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1028
1029 out:
1030 brelse(indbh);
1031
1032 return error;
1033}
1034
1035static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1036 struct gfs2_ea_location *el)
1037{
1038 struct ea_set es;
1039 unsigned int blks = 2;
1040 int error;
1041
1042 memset(&es, 0, sizeof(struct ea_set));
1043 es.es_er = er;
1044 es.es_el = el;
1045
1046 error = ea_foreach(ip, ea_set_simple, &es);
1047 if (error > 0)
1048 return 0;
1049 if (error)
1050 return error;
1051
1052 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1053 blks++;
1054 if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
5c676f6d 1055 blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize);
b3b94faa
DT		 1056
1057 return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1058}
1059
1060static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1061 struct gfs2_ea_location *el)
1062{
1063 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1064 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1065 gfs2_assert_withdraw(ip->i_sbd,
1066 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1067 }
1068
1069 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1070}
1071
1072int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1073{
1074 struct gfs2_ea_location el;
1075 int error;
1076
1077 if (!ip->i_di.di_eattr) {
1078 if (er->er_flags & XATTR_REPLACE)
1079 return -ENODATA;
1080 return ea_init(ip, er);
1081 }
1082
1083 error = gfs2_ea_find(ip, er, &el);
1084 if (error)
1085 return error;
1086
1087 if (el.el_ea) {
1088 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1089 brelse(el.el_bh);
1090 return -EPERM;
1091 }
1092
1093 error = -EEXIST;
1094 if (!(er->er_flags & XATTR_CREATE)) {
1095 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1096 error = ea_set_i(ip, er, &el);
1097 if (!error && unstuffed)
1098 ea_set_remove_unstuffed(ip, &el);
1099 }
1100
1101 brelse(el.el_bh);
1102 } else {
1103 error = -ENODATA;
1104 if (!(er->er_flags & XATTR_REPLACE))
1105 error = ea_set_i(ip, er, NULL);
1106 }
1107
1108 return error;
1109}
1110
1111int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1112{
1113 struct gfs2_holder i_gh;
1114 int error;
1115
1116 if (!er->er_name_len ||
1117 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1118 return -EINVAL;
1119 if (!er->er_data || !er->er_data_len) {
1120 er->er_data = NULL;
1121 er->er_data_len = 0;
1122 }
1123 error = ea_check_size(ip->i_sbd, er);
1124 if (error)
1125 return error;
1126
1127 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1128 if (error)
1129 return error;
1130
1131 if (IS_IMMUTABLE(ip->i_vnode))
1132 error = -EPERM;
1133 else
1134 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1135
1136 gfs2_glock_dq_uninit(&i_gh);
1137
1138 return error;
1139}
1140
1141static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1142{
1143 struct gfs2_ea_header *ea = el->el_ea;
1144 struct gfs2_ea_header *prev = el->el_prev;
1145 struct buffer_head *dibh;
1146 int error;
1147
1148 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1149 if (error)
1150 return error;
1151
d4e9c4c3 1152 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 1153
1154 if (prev) {
1155 uint32_t len;
1156
1157 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1158 prev->ea_rec_len = cpu_to_be32(len);
1159
1160 if (GFS2_EA_IS_LAST(ea))
1161 prev->ea_flags |= GFS2_EAFLAG_LAST;
1162 } else
1163 ea->ea_type = GFS2_EATYPE_UNUSED;
1164
1165 error = gfs2_meta_inode_buffer(ip, &dibh);
1166 if (!error) {
1167 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 1168 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1169 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1170 brelse(dibh);
1171 }
1172
1173 gfs2_trans_end(ip->i_sbd);
1174
1175 return error;
1176}
1177
1178int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1179{
1180 struct gfs2_ea_location el;
1181 int error;
1182
1183 if (!ip->i_di.di_eattr)
1184 return -ENODATA;
1185
1186 error = gfs2_ea_find(ip, er, &el);
1187 if (error)
1188 return error;
1189 if (!el.el_ea)
1190 return -ENODATA;
1191
1192 if (GFS2_EA_IS_STUFFED(el.el_ea))
1193 error = ea_remove_stuffed(ip, &el);
1194 else
1195 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1196 0);
1197
1198 brelse(el.el_bh);
1199
1200 return error;
1201}
1202
1203/**
1204 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1205 * @ip: pointer to the inode of the target file
1206 * @er: request information
1207 *
1208 * Returns: errno
1209 */
1210
1211int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1212{
1213 struct gfs2_holder i_gh;
1214 int error;
1215
1216 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1217 return -EINVAL;
1218
1219 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1220 if (error)
1221 return error;
1222
1223 if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1224 error = -EPERM;
1225 else
1226 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1227
1228 gfs2_glock_dq_uninit(&i_gh);
1229
1230 return error;
1231}
1232
1233static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1234 struct gfs2_ea_header *ea, char *data)
1235{
1236 struct gfs2_sbd *sdp = ip->i_sbd;
1237 struct buffer_head **bh;
1238 unsigned int amount = GFS2_EA_DATA_LEN(ea);
5c676f6d 1239 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
b3b94faa
DT		 1240 uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1241 unsigned int x;
1242 int error;
1243
1244 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1245 if (!bh)
1246 return -ENOMEM;
1247
1248 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1249 if (error)
1250 goto out;
1251
1252 for (x = 0; x < nptrs; x++) {
1253 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1254 DIO_START, bh + x);
1255 if (error) {
1256 while (x--)
1257 brelse(bh[x]);
1258 goto fail;
1259 }
1260 dataptrs++;
1261 }
1262
1263 for (x = 0; x < nptrs; x++) {
1264 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1265 if (error) {
1266 for (; x < nptrs; x++)
1267 brelse(bh[x]);
1268 goto fail;
1269 }
1270 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1271 for (; x < nptrs; x++)
1272 brelse(bh[x]);
1273 error = -EIO;
1274 goto fail;
1275 }
1276
d4e9c4c3 1277 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
b3b94faa
DT		 1278
1279 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1280 data,
1281 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1282
1283 amount -= sdp->sd_jbsize;
1284 data += sdp->sd_jbsize;
1285
1286 brelse(bh[x]);
1287 }
1288
1289 out:
1290 kfree(bh);
1291
1292 return error;
1293
1294 fail:
1295 gfs2_trans_end(sdp);
1296 kfree(bh);
1297
1298 return error;
1299}
1300
1301int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1302 struct iattr *attr, char *data)
1303{
1304 struct buffer_head *dibh;
1305 int error;
1306
1307 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1308 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1309 if (error)
1310 return error;
1311
d4e9c4c3 1312 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 1313 memcpy(GFS2_EA2DATA(el->el_ea),
1314 data,
1315 GFS2_EA_DATA_LEN(el->el_ea));
1316 } else
1317 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1318
1319 if (error)
1320 return error;
1321
1322 error = gfs2_meta_inode_buffer(ip, &dibh);
1323 if (!error) {
1324 error = inode_setattr(ip->i_vnode, attr);
1325 gfs2_assert_warn(ip->i_sbd, !error);
1326 gfs2_inode_attr_out(ip);
d4e9c4c3 1327 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1328 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1329 brelse(dibh);
1330 }
1331
1332 gfs2_trans_end(ip->i_sbd);
1333
1334 return error;
1335}
1336
1337static int ea_dealloc_indirect(struct gfs2_inode *ip)
1338{
1339 struct gfs2_sbd *sdp = ip->i_sbd;
1340 struct gfs2_rgrp_list rlist;
1341 struct buffer_head *indbh, *dibh;
1342 uint64_t *eablk, *end;
1343 unsigned int rg_blocks = 0;
1344 uint64_t bstart = 0;
1345 unsigned int blen = 0;
1346 unsigned int blks = 0;
1347 unsigned int x;
1348 int error;
1349
1350 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1351
1352 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1353 DIO_START | DIO_WAIT, &indbh);
1354 if (error)
1355 return error;
1356
1357 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1358 error = -EIO;
1359 goto out;
1360 }
1361
1362 eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1363 end = eablk + sdp->sd_inptrs;
1364
1365 for (; eablk < end; eablk++) {
1366 uint64_t bn;
1367
1368 if (!*eablk)
1369 break;
1370 bn = be64_to_cpu(*eablk);
1371
1372 if (bstart + blen == bn)
1373 blen++;
1374 else {
1375 if (bstart)
1376 gfs2_rlist_add(sdp, &rlist, bstart);
1377 bstart = bn;
1378 blen = 1;
1379 }
1380 blks++;
1381 }
1382 if (bstart)
1383 gfs2_rlist_add(sdp, &rlist, bstart);
1384 else
1385 goto out;
1386
1387 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1388
1389 for (x = 0; x < rlist.rl_rgrps; x++) {
1390 struct gfs2_rgrpd *rgd;
5c676f6d 1391 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
b3b94faa
DT		 1392 rg_blocks += rgd->rd_ri.ri_length;
1393 }
1394
1395 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1396 if (error)
1397 goto out_rlist_free;
1398
1399 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1400 RES_INDIRECT + RES_STATFS +
1401 RES_QUOTA, blks);
1402 if (error)
1403 goto out_gunlock;
1404
d4e9c4c3 1405 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 1406
1407 eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1408 bstart = 0;
1409 blen = 0;
1410
1411 for (; eablk < end; eablk++) {
1412 uint64_t bn;
1413
1414 if (!*eablk)
1415 break;
1416 bn = be64_to_cpu(*eablk);
1417
1418 if (bstart + blen == bn)
1419 blen++;
1420 else {
1421 if (bstart)
1422 gfs2_free_meta(ip, bstart, blen);
1423 bstart = bn;
1424 blen = 1;
1425 }
1426
1427 *eablk = 0;
1428 if (!ip->i_di.di_blocks)
1429 gfs2_consist_inode(ip);
1430 ip->i_di.di_blocks--;
1431 }
1432 if (bstart)
1433 gfs2_free_meta(ip, bstart, blen);
1434
1435 ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1436
1437 error = gfs2_meta_inode_buffer(ip, &dibh);
1438 if (!error) {
d4e9c4c3 1439 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1440 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1441 brelse(dibh);
1442 }
1443
1444 gfs2_trans_end(sdp);
1445
1446 out_gunlock:
1447 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1448
1449 out_rlist_free:
1450 gfs2_rlist_free(&rlist);
1451
1452 out:
1453 brelse(indbh);
1454
1455 return error;
1456}
1457
1458static int ea_dealloc_block(struct gfs2_inode *ip)
1459{
1460 struct gfs2_sbd *sdp = ip->i_sbd;
1461 struct gfs2_alloc *al = &ip->i_alloc;
1462 struct gfs2_rgrpd *rgd;
1463 struct buffer_head *dibh;
1464 int error;
1465
1466 rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1467 if (!rgd) {
1468 gfs2_consist_inode(ip);
1469 return -EIO;
1470 }
1471
1472 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1473 &al->al_rgd_gh);
1474 if (error)
1475 return error;
1476
1477 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1478 RES_STATFS + RES_QUOTA, 1);
1479 if (error)
1480 goto out_gunlock;
1481
1482 gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1483
1484 ip->i_di.di_eattr = 0;
1485 if (!ip->i_di.di_blocks)
1486 gfs2_consist_inode(ip);
1487 ip->i_di.di_blocks--;
1488
1489 error = gfs2_meta_inode_buffer(ip, &dibh);
1490 if (!error) {
d4e9c4c3 1491 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1492 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1493 brelse(dibh);
1494 }
1495
1496 gfs2_trans_end(sdp);
1497
1498 out_gunlock:
1499 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1500
1501 return error;
1502}
1503
1504/**
1505 * gfs2_ea_dealloc - deallocate the extended attribute fork
1506 * @ip: the inode
1507 *
1508 * Returns: errno
1509 */
1510
1511int gfs2_ea_dealloc(struct gfs2_inode *ip)
1512{
1513 struct gfs2_alloc *al;
1514 int error;
1515
1516 al = gfs2_alloc_get(ip);
1517
1518 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1519 if (error)
1520 goto out_alloc;
1521
1522 error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1523 if (error)
1524 goto out_quota;
1525
1526 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1527 if (error)
1528 goto out_rindex;
1529
1530 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1531 error = ea_dealloc_indirect(ip);
1532 if (error)
1533 goto out_rindex;
1534 }
1535
1536 error = ea_dealloc_block(ip);
1537
1538 out_rindex:
1539 gfs2_glock_dq_uninit(&al->al_ri_gh);
1540
1541 out_quota:
1542 gfs2_quota_unhold(ip);
1543
1544 out_alloc:
1545 gfs2_alloc_put(ip);
1546
1547 return error;
1548}
1549
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