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[GFS2] Update copyright, tidy up incore.h
[deliverable/linux.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
e9fc2aa0 7 * of the GNU General Public License version 2.
b3b94faa
DT		 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
feaa7bba 83 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
b3b94faa
DT		 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
feaa7bba 131 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
b3b94faa
DT		 132 error = -EIO;
133 goto out;
134 }
135
136 eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
feaa7bba 137 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
b3b94faa
DT		 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;
feaa7bba 235 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 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
feaa7bba 341 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
b3b94faa
DT		 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) {
01eb7c07
SW		 377 char *prefix = NULL;
378 unsigned int l = 0;
b3b94faa
DT		 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;
b3b94faa
DT		 397 }
398
01eb7c07
SW		 399 BUG_ON(l == 0);
400
90cdd208
SW		 401 memcpy(er->er_data + ei->ei_size, prefix, l);
402 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
b3b94faa 403 ea->ea_name_len);
90cdd208 404 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
b3b94faa
DT		 405 }
406
407 ei->ei_size += ea_size;
408
409 return 0;
410}
411
412/**
413 * gfs2_ea_list -
414 * @ip:
415 * @er:
416 *
417 * Returns: actual size of data on success, -errno on error
418 */
419
420int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
421{
422 struct gfs2_holder i_gh;
423 int error;
424
425 if (!er->er_data || !er->er_data_len) {
426 er->er_data = NULL;
427 er->er_data_len = 0;
428 }
429
430 error = gfs2_glock_nq_init(ip->i_gl,
431 LM_ST_SHARED, LM_FLAG_ANY,
432 &i_gh);
433 if (error)
434 return error;
435
436 if (ip->i_di.di_eattr) {
437 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
438
439 error = ea_foreach(ip, ea_list_i, &ei);
440 if (!error)
441 error = ei.ei_size;
442 }
443
444 gfs2_glock_dq_uninit(&i_gh);
445
446 return error;
447}
448
449/**
450 * ea_get_unstuffed - actually copies the unstuffed data into the
451 * request buffer
452 * @ip:
453 * @ea:
454 * @data:
455 *
456 * Returns: errno
457 */
458
459static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
460 char *data)
461{
feaa7bba 462 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 463 struct buffer_head **bh;
464 unsigned int amount = GFS2_EA_DATA_LEN(ea);
5c676f6d 465 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
b3b94faa
DT		 466 uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
467 unsigned int x;
468 int error = 0;
469
470 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
471 if (!bh)
472 return -ENOMEM;
473
474 for (x = 0; x < nptrs; x++) {
475 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
476 DIO_START, bh + x);
477 if (error) {
478 while (x--)
479 brelse(bh[x]);
480 goto out;
481 }
482 dataptrs++;
483 }
484
485 for (x = 0; x < nptrs; x++) {
486 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
487 if (error) {
488 for (; x < nptrs; x++)
489 brelse(bh[x]);
490 goto out;
491 }
492 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
493 for (; x < nptrs; x++)
494 brelse(bh[x]);
495 error = -EIO;
496 goto out;
497 }
498
499 memcpy(data,
500 bh[x]->b_data + sizeof(struct gfs2_meta_header),
501 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
502
503 amount -= sdp->sd_jbsize;
504 data += sdp->sd_jbsize;
505
506 brelse(bh[x]);
507 }
508
509 out:
510 kfree(bh);
511
512 return error;
513}
514
515int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
516 char *data)
517{
518 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
519 memcpy(data,
520 GFS2_EA2DATA(el->el_ea),
521 GFS2_EA_DATA_LEN(el->el_ea));
522 return 0;
523 } else
524 return ea_get_unstuffed(ip, el->el_ea, data);
525}
526
527/**
528 * gfs2_ea_get_i -
529 * @ip:
530 * @er:
531 *
532 * Returns: actual size of data on success, -errno on error
533 */
534
535int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
536{
537 struct gfs2_ea_location el;
538 int error;
539
540 if (!ip->i_di.di_eattr)
541 return -ENODATA;
542
543 error = gfs2_ea_find(ip, er, &el);
544 if (error)
545 return error;
546 if (!el.el_ea)
547 return -ENODATA;
548
549 if (er->er_data_len) {
550 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
551 error = -ERANGE;
552 else
553 error = gfs2_ea_get_copy(ip, &el, er->er_data);
554 }
555 if (!error)
556 error = GFS2_EA_DATA_LEN(el.el_ea);
557
558 brelse(el.el_bh);
559
560 return error;
561}
562
563/**
564 * gfs2_ea_get -
565 * @ip:
566 * @er:
567 *
568 * Returns: actual size of data on success, -errno on error
569 */
570
571int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
572{
573 struct gfs2_holder i_gh;
574 int error;
575
576 if (!er->er_name_len ||
577 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
578 return -EINVAL;
579 if (!er->er_data || !er->er_data_len) {
580 er->er_data = NULL;
581 er->er_data_len = 0;
582 }
583
584 error = gfs2_glock_nq_init(ip->i_gl,
585 LM_ST_SHARED, LM_FLAG_ANY,
586 &i_gh);
587 if (error)
588 return error;
589
590 error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
591
592 gfs2_glock_dq_uninit(&i_gh);
593
594 return error;
595}
596
597/**
598 * ea_alloc_blk - allocates a new block for extended attributes.
599 * @ip: A pointer to the inode that's getting extended attributes
600 * @bhp:
601 *
602 * Returns: errno
603 */
604
605static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
606{
feaa7bba 607 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 608 struct gfs2_ea_header *ea;
609 uint64_t block;
610
611 block = gfs2_alloc_meta(ip);
612
613 *bhp = gfs2_meta_new(ip->i_gl, block);
d4e9c4c3 614 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
b3b94faa
DT		 615 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
616 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
617
618 ea = GFS2_EA_BH2FIRST(*bhp);
619 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
620 ea->ea_type = GFS2_EATYPE_UNUSED;
621 ea->ea_flags = GFS2_EAFLAG_LAST;
622 ea->ea_num_ptrs = 0;
623
624 ip->i_di.di_blocks++;
625
626 return 0;
627}
628
629/**
630 * ea_write - writes the request info to an ea, creating new blocks if
631 * necessary
632 * @ip: inode that is being modified
633 * @ea: the location of the new ea in a block
634 * @er: the write request
635 *
636 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
637 *
638 * returns : errno
639 */
640
641static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
642 struct gfs2_ea_request *er)
643{
feaa7bba 644 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 645
646 ea->ea_data_len = cpu_to_be32(er->er_data_len);
647 ea->ea_name_len = er->er_name_len;
648 ea->ea_type = er->er_type;
649 ea->__pad = 0;
650
651 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
652
653 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
654 ea->ea_num_ptrs = 0;
655 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
656 } else {
657 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
658 const char *data = er->er_data;
659 unsigned int data_len = er->er_data_len;
660 unsigned int copy;
661 unsigned int x;
662
5c676f6d 663 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
b3b94faa
DT		 664 for (x = 0; x < ea->ea_num_ptrs; x++) {
665 struct buffer_head *bh;
666 uint64_t block;
667 int mh_size = sizeof(struct gfs2_meta_header);
668
669 block = gfs2_alloc_meta(ip);
670
671 bh = gfs2_meta_new(ip->i_gl, block);
d4e9c4c3 672 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 673 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
674
675 ip->i_di.di_blocks++;
676
677 copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
678 data_len;
679 memcpy(bh->b_data + mh_size, data, copy);
680 if (copy < sdp->sd_jbsize)
681 memset(bh->b_data + mh_size + copy, 0,
682 sdp->sd_jbsize - copy);
683
684 *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
685 data += copy;
686 data_len -= copy;
687
688 brelse(bh);
689 }
690
691 gfs2_assert_withdraw(sdp, !data_len);
692 }
693
694 return 0;
695}
696
697typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
698 struct gfs2_ea_request *er,
699 void *private);
700
701static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
702 unsigned int blks,
703 ea_skeleton_call_t skeleton_call,
704 void *private)
705{
706 struct gfs2_alloc *al;
707 struct buffer_head *dibh;
708 int error;
709
710 al = gfs2_alloc_get(ip);
711
712 error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
713 if (error)
714 goto out;
715
716 error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
717 if (error)
718 goto out_gunlock_q;
719
720 al->al_requested = blks;
721
722 error = gfs2_inplace_reserve(ip);
723 if (error)
724 goto out_gunlock_q;
725
feaa7bba 726 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
b3b94faa
DT		 727 blks + al->al_rgd->rd_ri.ri_length +
728 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
729 if (error)
730 goto out_ipres;
731
732 error = skeleton_call(ip, er, private);
733 if (error)
734 goto out_end_trans;
735
736 error = gfs2_meta_inode_buffer(ip, &dibh);
737 if (!error) {
738 if (er->er_flags & GFS2_ERF_MODE) {
feaa7bba 739 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
b3b94faa
DT		 740 (ip->i_di.di_mode & S_IFMT) ==
741 (er->er_mode & S_IFMT));
742 ip->i_di.di_mode = er->er_mode;
743 }
744 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 745 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 746 gfs2_dinode_out(&ip->i_di, dibh->b_data);
747 brelse(dibh);
748 }
749
750 out_end_trans:
feaa7bba 751 gfs2_trans_end(GFS2_SB(&ip->i_inode));
b3b94faa
DT		 752
753 out_ipres:
754 gfs2_inplace_release(ip);
755
756 out_gunlock_q:
757 gfs2_quota_unlock(ip);
758
759 out:
760 gfs2_alloc_put(ip);
761
762 return error;
763}
764
765static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
766 void *private)
767{
768 struct buffer_head *bh;
769 int error;
770
771 error = ea_alloc_blk(ip, &bh);
772 if (error)
773 return error;
774
775 ip->i_di.di_eattr = bh->b_blocknr;
776 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
777
778 brelse(bh);
779
780 return error;
781}
782
783/**
784 * ea_init - initializes a new eattr block
785 * @ip:
786 * @er:
787 *
788 * Returns: errno
789 */
790
791static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
792{
feaa7bba 793 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
b3b94faa
DT		 794 unsigned int blks = 1;
795
796 if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
5c676f6d 797 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
b3b94faa
DT		 798
799 return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
800}
801
802static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
803{
804 uint32_t ea_size = GFS2_EA_SIZE(ea);
568f4c96
SW		 805 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
806 ea_size);
b3b94faa
DT		 807 uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
808 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
809
810 ea->ea_rec_len = cpu_to_be32(ea_size);
811 ea->ea_flags ^= last;
812
813 new->ea_rec_len = cpu_to_be32(new_size);
814 new->ea_flags = last;
815
816 return new;
817}
818
819static void ea_set_remove_stuffed(struct gfs2_inode *ip,
820 struct gfs2_ea_location *el)
821{
822 struct gfs2_ea_header *ea = el->el_ea;
823 struct gfs2_ea_header *prev = el->el_prev;
824 uint32_t len;
825
d4e9c4c3 826 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 827
828 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
829 ea->ea_type = GFS2_EATYPE_UNUSED;
830 return;
831 } else if (GFS2_EA2NEXT(prev) != ea) {
832 prev = GFS2_EA2NEXT(prev);
feaa7bba 833 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
b3b94faa
DT		 834 }
835
836 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
837 prev->ea_rec_len = cpu_to_be32(len);
838
839 if (GFS2_EA_IS_LAST(ea))
840 prev->ea_flags |= GFS2_EAFLAG_LAST;
841}
842
843struct ea_set {
844 int ea_split;
845
846 struct gfs2_ea_request *es_er;
847 struct gfs2_ea_location *es_el;
848
849 struct buffer_head *es_bh;
850 struct gfs2_ea_header *es_ea;
851};
852
853static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
854 struct gfs2_ea_header *ea, struct ea_set *es)
855{
856 struct gfs2_ea_request *er = es->es_er;
857 struct buffer_head *dibh;
858 int error;
859
feaa7bba 860 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
b3b94faa
DT		 861 if (error)
862 return error;
863
d4e9c4c3 864 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 865
866 if (es->ea_split)
867 ea = ea_split_ea(ea);
868
869 ea_write(ip, ea, er);
870
871 if (es->es_el)
872 ea_set_remove_stuffed(ip, es->es_el);
873
874 error = gfs2_meta_inode_buffer(ip, &dibh);
875 if (error)
876 goto out;
877
878 if (er->er_flags & GFS2_ERF_MODE) {
feaa7bba 879 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
b3b94faa
DT		 880 (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
881 ip->i_di.di_mode = er->er_mode;
882 }
883 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 884 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 885 gfs2_dinode_out(&ip->i_di, dibh->b_data);
886 brelse(dibh);
887 out:
feaa7bba 888 gfs2_trans_end(GFS2_SB(&ip->i_inode));
b3b94faa
DT		 889
890 return error;
891}
892
893static int ea_set_simple_alloc(struct gfs2_inode *ip,
894 struct gfs2_ea_request *er, void *private)
895{
896 struct ea_set *es = private;
897 struct gfs2_ea_header *ea = es->es_ea;
898 int error;
899
d4e9c4c3 900 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
b3b94faa
DT		 901
902 if (es->ea_split)
903 ea = ea_split_ea(ea);
904
905 error = ea_write(ip, ea, er);
906 if (error)
907 return error;
908
909 if (es->es_el)
910 ea_set_remove_stuffed(ip, es->es_el);
911
912 return 0;
913}
914
915static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
916 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
917 void *private)
918{
919 struct ea_set *es = private;
920 unsigned int size;
921 int stuffed;
922 int error;
923
feaa7bba 924 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er, &size);
b3b94faa
DT		 925
926 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
927 if (GFS2_EA_REC_LEN(ea) < size)
928 return 0;
929 if (!GFS2_EA_IS_STUFFED(ea)) {
930 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
931 if (error)
932 return error;
933 }
934 es->ea_split = 0;
935 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
936 es->ea_split = 1;
937 else
938 return 0;
939
940 if (stuffed) {
941 error = ea_set_simple_noalloc(ip, bh, ea, es);
942 if (error)
943 return error;
944 } else {
945 unsigned int blks;
946
947 es->es_bh = bh;
948 es->es_ea = ea;
5c676f6d 949 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
feaa7bba 950 GFS2_SB(&ip->i_inode)->sd_jbsize);
b3b94faa
DT		 951
952 error = ea_alloc_skeleton(ip, es->es_er, blks,
953 ea_set_simple_alloc, es);
954 if (error)
955 return error;
956 }
957
958 return 1;
959}
960
961static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
962 void *private)
963{
feaa7bba 964 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 965 struct buffer_head *indbh, *newbh;
966 uint64_t *eablk;
967 int error;
968 int mh_size = sizeof(struct gfs2_meta_header);
969
970 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
971 uint64_t *end;
972
973 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
974 DIO_START | DIO_WAIT, &indbh);
975 if (error)
976 return error;
977
978 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
979 error = -EIO;
980 goto out;
981 }
982
983 eablk = (uint64_t *)(indbh->b_data + mh_size);
984 end = eablk + sdp->sd_inptrs;
985
986 for (; eablk < end; eablk++)
987 if (!*eablk)
988 break;
989
990 if (eablk == end) {
991 error = -ENOSPC;
992 goto out;
993 }
994
d4e9c4c3 995 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 996 } else {
997 uint64_t blk;
998
999 blk = gfs2_alloc_meta(ip);
1000
1001 indbh = gfs2_meta_new(ip->i_gl, blk);
d4e9c4c3 1002 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 1003 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1004 gfs2_buffer_clear_tail(indbh, mh_size);
1005
1006 eablk = (uint64_t *)(indbh->b_data + mh_size);
1007 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1008 ip->i_di.di_eattr = blk;
1009 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1010 ip->i_di.di_blocks++;
1011
1012 eablk++;
1013 }
1014
1015 error = ea_alloc_blk(ip, &newbh);
1016 if (error)
1017 goto out;
1018
1019 *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1020 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1021 brelse(newbh);
1022 if (error)
1023 goto out;
1024
1025 if (private)
1026 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1027
1028 out:
1029 brelse(indbh);
1030
1031 return error;
1032}
1033
1034static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1035 struct gfs2_ea_location *el)
1036{
1037 struct ea_set es;
1038 unsigned int blks = 2;
1039 int error;
1040
1041 memset(&es, 0, sizeof(struct ea_set));
1042 es.es_er = er;
1043 es.es_el = el;
1044
1045 error = ea_foreach(ip, ea_set_simple, &es);
1046 if (error > 0)
1047 return 0;
1048 if (error)
1049 return error;
1050
1051 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1052 blks++;
feaa7bba
SW		 1053 if (GFS2_EAREQ_SIZE_STUFFED(er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1054 blks += DIV_ROUND_UP(er->er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
b3b94faa
DT		 1055
1056 return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1057}
1058
1059static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1060 struct gfs2_ea_location *el)
1061{
1062 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1063 el->el_prev = GFS2_EA2NEXT(el->el_prev);
feaa7bba 1064 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
b3b94faa
DT		 1065 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1066 }
1067
1068 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1069}
1070
1071int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1072{
1073 struct gfs2_ea_location el;
1074 int error;
1075
1076 if (!ip->i_di.di_eattr) {
1077 if (er->er_flags & XATTR_REPLACE)
1078 return -ENODATA;
1079 return ea_init(ip, er);
1080 }
1081
1082 error = gfs2_ea_find(ip, er, &el);
1083 if (error)
1084 return error;
1085
1086 if (el.el_ea) {
1087 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1088 brelse(el.el_bh);
1089 return -EPERM;
1090 }
1091
1092 error = -EEXIST;
1093 if (!(er->er_flags & XATTR_CREATE)) {
1094 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1095 error = ea_set_i(ip, er, &el);
1096 if (!error && unstuffed)
1097 ea_set_remove_unstuffed(ip, &el);
1098 }
1099
1100 brelse(el.el_bh);
1101 } else {
1102 error = -ENODATA;
1103 if (!(er->er_flags & XATTR_REPLACE))
1104 error = ea_set_i(ip, er, NULL);
1105 }
1106
1107 return error;
1108}
1109
1110int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1111{
1112 struct gfs2_holder i_gh;
1113 int error;
1114
1115 if (!er->er_name_len ||
1116 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1117 return -EINVAL;
1118 if (!er->er_data || !er->er_data_len) {
1119 er->er_data = NULL;
1120 er->er_data_len = 0;
1121 }
feaa7bba 1122 error = ea_check_size(GFS2_SB(&ip->i_inode), er);
b3b94faa
DT		 1123 if (error)
1124 return error;
1125
1126 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1127 if (error)
1128 return error;
1129
feaa7bba 1130 if (IS_IMMUTABLE(&ip->i_inode))
b3b94faa
DT		 1131 error = -EPERM;
1132 else
1133 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1134
1135 gfs2_glock_dq_uninit(&i_gh);
1136
1137 return error;
1138}
1139
1140static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1141{
1142 struct gfs2_ea_header *ea = el->el_ea;
1143 struct gfs2_ea_header *prev = el->el_prev;
1144 struct buffer_head *dibh;
1145 int error;
1146
feaa7bba 1147 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
b3b94faa
DT		 1148 if (error)
1149 return error;
1150
d4e9c4c3 1151 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 1152
1153 if (prev) {
1154 uint32_t len;
1155
1156 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1157 prev->ea_rec_len = cpu_to_be32(len);
1158
1159 if (GFS2_EA_IS_LAST(ea))
1160 prev->ea_flags |= GFS2_EAFLAG_LAST;
1161 } else
1162 ea->ea_type = GFS2_EATYPE_UNUSED;
1163
1164 error = gfs2_meta_inode_buffer(ip, &dibh);
1165 if (!error) {
1166 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 1167 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1168 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1169 brelse(dibh);
1170 }
1171
feaa7bba 1172 gfs2_trans_end(GFS2_SB(&ip->i_inode));
b3b94faa
DT		 1173
1174 return error;
1175}
1176
1177int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1178{
1179 struct gfs2_ea_location el;
1180 int error;
1181
1182 if (!ip->i_di.di_eattr)
1183 return -ENODATA;
1184
1185 error = gfs2_ea_find(ip, er, &el);
1186 if (error)
1187 return error;
1188 if (!el.el_ea)
1189 return -ENODATA;
1190
1191 if (GFS2_EA_IS_STUFFED(el.el_ea))
1192 error = ea_remove_stuffed(ip, &el);
1193 else
1194 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1195 0);
1196
1197 brelse(el.el_bh);
1198
1199 return error;
1200}
1201
1202/**
1203 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1204 * @ip: pointer to the inode of the target file
1205 * @er: request information
1206 *
1207 * Returns: errno
1208 */
1209
1210int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1211{
1212 struct gfs2_holder i_gh;
1213 int error;
1214
1215 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1216 return -EINVAL;
1217
1218 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1219 if (error)
1220 return error;
1221
feaa7bba 1222 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
b3b94faa
DT		 1223 error = -EPERM;
1224 else
1225 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1226
1227 gfs2_glock_dq_uninit(&i_gh);
1228
1229 return error;
1230}
1231
1232static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1233 struct gfs2_ea_header *ea, char *data)
1234{
feaa7bba 1235 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 1236 struct buffer_head **bh;
1237 unsigned int amount = GFS2_EA_DATA_LEN(ea);
5c676f6d 1238 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
b3b94faa
DT		 1239 uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1240 unsigned int x;
1241 int error;
1242
1243 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1244 if (!bh)
1245 return -ENOMEM;
1246
1247 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1248 if (error)
1249 goto out;
1250
1251 for (x = 0; x < nptrs; x++) {
1252 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1253 DIO_START, bh + x);
1254 if (error) {
1255 while (x--)
1256 brelse(bh[x]);
1257 goto fail;
1258 }
1259 dataptrs++;
1260 }
1261
1262 for (x = 0; x < nptrs; x++) {
1263 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1264 if (error) {
1265 for (; x < nptrs; x++)
1266 brelse(bh[x]);
1267 goto fail;
1268 }
1269 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1270 for (; x < nptrs; x++)
1271 brelse(bh[x]);
1272 error = -EIO;
1273 goto fail;
1274 }
1275
d4e9c4c3 1276 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
b3b94faa
DT		 1277
1278 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1279 data,
1280 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1281
1282 amount -= sdp->sd_jbsize;
1283 data += sdp->sd_jbsize;
1284
1285 brelse(bh[x]);
1286 }
1287
1288 out:
1289 kfree(bh);
1290
1291 return error;
1292
1293 fail:
1294 gfs2_trans_end(sdp);
1295 kfree(bh);
1296
1297 return error;
1298}
1299
1300int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1301 struct iattr *attr, char *data)
1302{
1303 struct buffer_head *dibh;
1304 int error;
1305
1306 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
feaa7bba 1307 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
b3b94faa
DT		 1308 if (error)
1309 return error;
1310
d4e9c4c3 1311 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 1312 memcpy(GFS2_EA2DATA(el->el_ea),
1313 data,
1314 GFS2_EA_DATA_LEN(el->el_ea));
1315 } else
1316 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1317
1318 if (error)
1319 return error;
1320
1321 error = gfs2_meta_inode_buffer(ip, &dibh);
1322 if (!error) {
feaa7bba
SW		 1323 error = inode_setattr(&ip->i_inode, attr);
1324 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
b3b94faa 1325 gfs2_inode_attr_out(ip);
d4e9c4c3 1326 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1327 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1328 brelse(dibh);
1329 }
1330
feaa7bba 1331 gfs2_trans_end(GFS2_SB(&ip->i_inode));
b3b94faa
DT		 1332
1333 return error;
1334}
1335
1336static int ea_dealloc_indirect(struct gfs2_inode *ip)
1337{
feaa7bba 1338 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 1339 struct gfs2_rgrp_list rlist;
1340 struct buffer_head *indbh, *dibh;
1341 uint64_t *eablk, *end;
1342 unsigned int rg_blocks = 0;
1343 uint64_t bstart = 0;
1344 unsigned int blen = 0;
1345 unsigned int blks = 0;
1346 unsigned int x;
1347 int error;
1348
1349 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1350
1351 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1352 DIO_START | DIO_WAIT, &indbh);
1353 if (error)
1354 return error;
1355
1356 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1357 error = -EIO;
1358 goto out;
1359 }
1360
1361 eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1362 end = eablk + sdp->sd_inptrs;
1363
1364 for (; eablk < end; eablk++) {
1365 uint64_t bn;
1366
1367 if (!*eablk)
1368 break;
1369 bn = be64_to_cpu(*eablk);
1370
1371 if (bstart + blen == bn)
1372 blen++;
1373 else {
1374 if (bstart)
1375 gfs2_rlist_add(sdp, &rlist, bstart);
1376 bstart = bn;
1377 blen = 1;
1378 }
1379 blks++;
1380 }
1381 if (bstart)
1382 gfs2_rlist_add(sdp, &rlist, bstart);
1383 else
1384 goto out;
1385
1386 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1387
1388 for (x = 0; x < rlist.rl_rgrps; x++) {
1389 struct gfs2_rgrpd *rgd;
5c676f6d 1390 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
b3b94faa
DT		 1391 rg_blocks += rgd->rd_ri.ri_length;
1392 }
1393
1394 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1395 if (error)
1396 goto out_rlist_free;
1397
1398 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1399 RES_INDIRECT + RES_STATFS +
1400 RES_QUOTA, blks);
1401 if (error)
1402 goto out_gunlock;
1403
d4e9c4c3 1404 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 1405
1406 eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1407 bstart = 0;
1408 blen = 0;
1409
1410 for (; eablk < end; eablk++) {
1411 uint64_t bn;
1412
1413 if (!*eablk)
1414 break;
1415 bn = be64_to_cpu(*eablk);
1416
1417 if (bstart + blen == bn)
1418 blen++;
1419 else {
1420 if (bstart)
1421 gfs2_free_meta(ip, bstart, blen);
1422 bstart = bn;
1423 blen = 1;
1424 }
1425
1426 *eablk = 0;
1427 if (!ip->i_di.di_blocks)
1428 gfs2_consist_inode(ip);
1429 ip->i_di.di_blocks--;
1430 }
1431 if (bstart)
1432 gfs2_free_meta(ip, bstart, blen);
1433
1434 ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1435
1436 error = gfs2_meta_inode_buffer(ip, &dibh);
1437 if (!error) {
d4e9c4c3 1438 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1439 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1440 brelse(dibh);
1441 }
1442
1443 gfs2_trans_end(sdp);
1444
1445 out_gunlock:
1446 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1447
1448 out_rlist_free:
1449 gfs2_rlist_free(&rlist);
1450
1451 out:
1452 brelse(indbh);
1453
1454 return error;
1455}
1456
1457static int ea_dealloc_block(struct gfs2_inode *ip)
1458{
feaa7bba 1459 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 1460 struct gfs2_alloc *al = &ip->i_alloc;
1461 struct gfs2_rgrpd *rgd;
1462 struct buffer_head *dibh;
1463 int error;
1464
1465 rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1466 if (!rgd) {
1467 gfs2_consist_inode(ip);
1468 return -EIO;
1469 }
1470
1471 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1472 &al->al_rgd_gh);
1473 if (error)
1474 return error;
1475
1476 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1477 RES_STATFS + RES_QUOTA, 1);
1478 if (error)
1479 goto out_gunlock;
1480
1481 gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1482
1483 ip->i_di.di_eattr = 0;
1484 if (!ip->i_di.di_blocks)
1485 gfs2_consist_inode(ip);
1486 ip->i_di.di_blocks--;
1487
1488 error = gfs2_meta_inode_buffer(ip, &dibh);
1489 if (!error) {
d4e9c4c3 1490 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1491 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1492 brelse(dibh);
1493 }
1494
1495 gfs2_trans_end(sdp);
1496
1497 out_gunlock:
1498 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1499
1500 return error;
1501}
1502
1503/**
1504 * gfs2_ea_dealloc - deallocate the extended attribute fork
1505 * @ip: the inode
1506 *
1507 * Returns: errno
1508 */
1509
1510int gfs2_ea_dealloc(struct gfs2_inode *ip)
1511{
1512 struct gfs2_alloc *al;
1513 int error;
1514
1515 al = gfs2_alloc_get(ip);
1516
1517 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1518 if (error)
1519 goto out_alloc;
1520
feaa7bba 1521 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
b3b94faa
DT		 1522 if (error)
1523 goto out_quota;
1524
1525 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1526 if (error)
1527 goto out_rindex;
1528
1529 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1530 error = ea_dealloc_indirect(ip);
1531 if (error)
1532 goto out_rindex;
1533 }
1534
1535 error = ea_dealloc_block(ip);
1536
1537 out_rindex:
1538 gfs2_glock_dq_uninit(&al->al_ri_gh);
1539
1540 out_quota:
1541 gfs2_quota_unhold(ip);
1542
1543 out_alloc:
1544 gfs2_alloc_put(ip);
1545
1546 return error;
1547}
1548
Linux kernel - Deliverables
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