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[GFS2] [-mm patch] fs/gfs2/: possible cleanups
[deliverable/linux.git] / fs / gfs2 / eattr.c
CommitLineData
b3b94faa
DT		 1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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/semaphore.h>
18#include <asm/uaccess.h>
19
20#include "gfs2.h"
5c676f6d
SW		 21#include "lm_interface.h"
22#include "incore.h"
b3b94faa
DT		 23#include "acl.h"
24#include "eaops.h"
25#include "eattr.h"
26#include "glock.h"
27#include "inode.h"
28#include "meta_io.h"
29#include "quota.h"
30#include "rgrp.h"
31#include "trans.h"
5c676f6d 32#include "util.h"
b3b94faa
DT		 33
34/**
35 * ea_calc_size - returns the acutal number of bytes the request will take up
36 * (not counting any unstuffed data blocks)
37 * @sdp:
38 * @er:
39 * @size:
40 *
41 * Returns: 1 if the EA should be stuffed
42 */
43
44static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
45 unsigned int *size)
46{
47 *size = GFS2_EAREQ_SIZE_STUFFED(er);
48 if (*size <= sdp->sd_jbsize)
49 return 1;
50
51 *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
52
53 return 0;
54}
55
56static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
57{
58 unsigned int size;
59
60 if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
61 return -ERANGE;
62
63 ea_calc_size(sdp, er, &size);
64
65 /* This can only happen with 512 byte blocks */
66 if (size > sdp->sd_jbsize)
67 return -ERANGE;
68
69 return 0;
70}
71
72typedef int (*ea_call_t) (struct gfs2_inode *ip,
73 struct buffer_head *bh,
74 struct gfs2_ea_header *ea,
75 struct gfs2_ea_header *prev,
76 void *private);
77
78static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
79 ea_call_t ea_call, void *data)
80{
81 struct gfs2_ea_header *ea, *prev = NULL;
82 int error = 0;
83
84 if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA))
85 return -EIO;
86
87 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
88 if (!GFS2_EA_REC_LEN(ea))
89 goto fail;
90 if (!(bh->b_data <= (char *)ea &&
91 (char *)GFS2_EA2NEXT(ea) <=
92 bh->b_data + bh->b_size))
93 goto fail;
94 if (!GFS2_EATYPE_VALID(ea->ea_type))
95 goto fail;
96
97 error = ea_call(ip, bh, ea, prev, data);
98 if (error)
99 return error;
100
101 if (GFS2_EA_IS_LAST(ea)) {
102 if ((char *)GFS2_EA2NEXT(ea) !=
103 bh->b_data + bh->b_size)
104 goto fail;
105 break;
106 }
107 }
108
109 return error;
110
111 fail:
112 gfs2_consist_inode(ip);
113 return -EIO;
114}
115
116static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
117{
118 struct buffer_head *bh, *eabh;
119 uint64_t *eablk, *end;
120 int error;
121
122 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
123 DIO_START | DIO_WAIT, &bh);
124 if (error)
125 return error;
126
127 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
128 error = ea_foreach_i(ip, bh, ea_call, data);
129 goto out;
130 }
131
132 if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
133 error = -EIO;
134 goto out;
135 }
136
137 eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
138 end = eablk + ip->i_sbd->sd_inptrs;
139
140 for (; eablk < end; eablk++) {
141 uint64_t bn;
142
143 if (!*eablk)
144 break;
145 bn = be64_to_cpu(*eablk);
146
147 error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT,
148 &eabh);
149 if (error)
150 break;
151 error = ea_foreach_i(ip, eabh, ea_call, data);
152 brelse(eabh);
153 if (error)
154 break;
155 }
156 out:
157 brelse(bh);
158
159 return error;
160}
161
162struct ea_find {
163 struct gfs2_ea_request *ef_er;
164 struct gfs2_ea_location *ef_el;
165};
166
167static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
168 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
169 void *private)
170{
171 struct ea_find *ef = private;
172 struct gfs2_ea_request *er = ef->ef_er;
173
174 if (ea->ea_type == GFS2_EATYPE_UNUSED)
175 return 0;
176
177 if (ea->ea_type == er->er_type) {
178 if (ea->ea_name_len == er->er_name_len &&
179 !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
180 struct gfs2_ea_location *el = ef->ef_el;
181 get_bh(bh);
182 el->el_bh = bh;
183 el->el_ea = ea;
184 el->el_prev = prev;
185 return 1;
186 }
187 }
188
189#if 0
190 else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) &&
191 er->er_type == GFS2_EATYPE_SYS)
192 return 1;
193#endif
194
195 return 0;
196}
197
198int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
199 struct gfs2_ea_location *el)
200{
201 struct ea_find ef;
202 int error;
203
204 ef.ef_er = er;
205 ef.ef_el = el;
206
207 memset(el, 0, sizeof(struct gfs2_ea_location));
208
209 error = ea_foreach(ip, ea_find_i, &ef);
210 if (error > 0)
211 return 0;
212
213 return error;
214}
215
216/**
217 * ea_dealloc_unstuffed -
218 * @ip:
219 * @bh:
220 * @ea:
221 * @prev:
222 * @private:
223 *
224 * Take advantage of the fact that all unstuffed blocks are
225 * allocated from the same RG. But watch, this may not always
226 * be true.
227 *
228 * Returns: errno
229 */
230
231static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
232 struct gfs2_ea_header *ea,
233 struct gfs2_ea_header *prev, void *private)
234{
235 int *leave = private;
236 struct gfs2_sbd *sdp = ip->i_sbd;
237 struct gfs2_rgrpd *rgd;
238 struct gfs2_holder rg_gh;
239 struct buffer_head *dibh;
240 uint64_t *dataptrs, bn = 0;
241 uint64_t bstart = 0;
242 unsigned int blen = 0;
243 unsigned int blks = 0;
244 unsigned int x;
245 int error;
246
247 if (GFS2_EA_IS_STUFFED(ea))
248 return 0;
249
250 dataptrs = GFS2_EA2DATAPTRS(ea);
251 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
252 if (*dataptrs) {
253 blks++;
254 bn = be64_to_cpu(*dataptrs);
255 }
256 if (!blks)
257 return 0;
258
259 rgd = gfs2_blk2rgrpd(sdp, bn);
260 if (!rgd) {
261 gfs2_consist_inode(ip);
262 return -EIO;
263 }
264
265 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
266 if (error)
267 return error;
268
269 error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length +
270 RES_DINODE + RES_EATTR + RES_STATFS +
271 RES_QUOTA, blks);
272 if (error)
273 goto out_gunlock;
274
d4e9c4c3 275 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 276
277 dataptrs = GFS2_EA2DATAPTRS(ea);
278 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
279 if (!*dataptrs)
280 break;
281 bn = be64_to_cpu(*dataptrs);
282
283 if (bstart + blen == bn)
284 blen++;
285 else {
286 if (bstart)
287 gfs2_free_meta(ip, bstart, blen);
288 bstart = bn;
289 blen = 1;
290 }
291
292 *dataptrs = 0;
293 if (!ip->i_di.di_blocks)
294 gfs2_consist_inode(ip);
295 ip->i_di.di_blocks--;
296 }
297 if (bstart)
298 gfs2_free_meta(ip, bstart, blen);
299
300 if (prev && !leave) {
301 uint32_t len;
302
303 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
304 prev->ea_rec_len = cpu_to_be32(len);
305
306 if (GFS2_EA_IS_LAST(ea))
307 prev->ea_flags |= GFS2_EAFLAG_LAST;
308 } else {
309 ea->ea_type = GFS2_EATYPE_UNUSED;
310 ea->ea_num_ptrs = 0;
311 }
312
313 error = gfs2_meta_inode_buffer(ip, &dibh);
314 if (!error) {
315 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 316 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 317 gfs2_dinode_out(&ip->i_di, dibh->b_data);
318 brelse(dibh);
319 }
320
321 gfs2_trans_end(sdp);
322
323 out_gunlock:
324 gfs2_glock_dq_uninit(&rg_gh);
325
326 return error;
327}
328
329static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
330 struct gfs2_ea_header *ea,
331 struct gfs2_ea_header *prev, int leave)
332{
333 struct gfs2_alloc *al;
334 int error;
335
336 al = gfs2_alloc_get(ip);
337
338 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
339 if (error)
340 goto out_alloc;
341
342 error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
343 if (error)
344 goto out_quota;
345
346 error = ea_dealloc_unstuffed(ip,
347 bh, ea, prev,
348 (leave) ? &error : NULL);
349
350 gfs2_glock_dq_uninit(&al->al_ri_gh);
351
352 out_quota:
353 gfs2_quota_unhold(ip);
354
355 out_alloc:
356 gfs2_alloc_put(ip);
357
358 return error;
359}
360
08bc2dbc 361#if 0
b3b94faa
DT		 362
363static int gfs2_ea_repack_i(struct gfs2_inode *ip)
364{
365 return -EOPNOTSUPP;
366}
367
368int gfs2_ea_repack(struct gfs2_inode *ip)
369{
370 struct gfs2_holder gh;
371 int error;
372
373 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
374 if (error)
375 return error;
376
377 /* Some sort of permissions checking would be nice */
378
379 error = gfs2_ea_repack_i(ip);
380
381 gfs2_glock_dq_uninit(&gh);
382
383 return error;
384}
385
08bc2dbc
AB		 386#endif /* 0 */
387
b3b94faa
DT		 388struct ea_list {
389 struct gfs2_ea_request *ei_er;
390 unsigned int ei_size;
391};
392
393static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
394 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
395 void *private)
396{
397 struct ea_list *ei = private;
398 struct gfs2_ea_request *er = ei->ei_er;
399 unsigned int ea_size = GFS2_EA_STRLEN(ea);
400
401 if (ea->ea_type == GFS2_EATYPE_UNUSED)
402 return 0;
403
404 if (er->er_data_len) {
405 char *prefix;
406 unsigned int l;
407 char c = 0;
408
409 if (ei->ei_size + ea_size > er->er_data_len)
410 return -ERANGE;
411
412 if (ea->ea_type == GFS2_EATYPE_USR) {
413 prefix = "user.";
414 l = 5;
415 } else {
416 prefix = "system.";
417 l = 7;
418 }
419
420 memcpy(er->er_data + ei->ei_size,
421 prefix, l);
422 memcpy(er->er_data + ei->ei_size + l,
423 GFS2_EA2NAME(ea),
424 ea->ea_name_len);
425 memcpy(er->er_data + ei->ei_size +
426 ea_size - 1,
427 &c, 1);
428 }
429
430 ei->ei_size += ea_size;
431
432 return 0;
433}
434
435/**
436 * gfs2_ea_list -
437 * @ip:
438 * @er:
439 *
440 * Returns: actual size of data on success, -errno on error
441 */
442
443int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
444{
445 struct gfs2_holder i_gh;
446 int error;
447
448 if (!er->er_data || !er->er_data_len) {
449 er->er_data = NULL;
450 er->er_data_len = 0;
451 }
452
453 error = gfs2_glock_nq_init(ip->i_gl,
454 LM_ST_SHARED, LM_FLAG_ANY,
455 &i_gh);
456 if (error)
457 return error;
458
459 if (ip->i_di.di_eattr) {
460 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
461
462 error = ea_foreach(ip, ea_list_i, &ei);
463 if (!error)
464 error = ei.ei_size;
465 }
466
467 gfs2_glock_dq_uninit(&i_gh);
468
469 return error;
470}
471
472/**
473 * ea_get_unstuffed - actually copies the unstuffed data into the
474 * request buffer
475 * @ip:
476 * @ea:
477 * @data:
478 *
479 * Returns: errno
480 */
481
482static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
483 char *data)
484{
485 struct gfs2_sbd *sdp = ip->i_sbd;
486 struct buffer_head **bh;
487 unsigned int amount = GFS2_EA_DATA_LEN(ea);
5c676f6d 488 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
b3b94faa
DT		 489 uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
490 unsigned int x;
491 int error = 0;
492
493 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
494 if (!bh)
495 return -ENOMEM;
496
497 for (x = 0; x < nptrs; x++) {
498 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
499 DIO_START, bh + x);
500 if (error) {
501 while (x--)
502 brelse(bh[x]);
503 goto out;
504 }
505 dataptrs++;
506 }
507
508 for (x = 0; x < nptrs; x++) {
509 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
510 if (error) {
511 for (; x < nptrs; x++)
512 brelse(bh[x]);
513 goto out;
514 }
515 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
516 for (; x < nptrs; x++)
517 brelse(bh[x]);
518 error = -EIO;
519 goto out;
520 }
521
522 memcpy(data,
523 bh[x]->b_data + sizeof(struct gfs2_meta_header),
524 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
525
526 amount -= sdp->sd_jbsize;
527 data += sdp->sd_jbsize;
528
529 brelse(bh[x]);
530 }
531
532 out:
533 kfree(bh);
534
535 return error;
536}
537
538int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
539 char *data)
540{
541 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
542 memcpy(data,
543 GFS2_EA2DATA(el->el_ea),
544 GFS2_EA_DATA_LEN(el->el_ea));
545 return 0;
546 } else
547 return ea_get_unstuffed(ip, el->el_ea, data);
548}
549
550/**
551 * gfs2_ea_get_i -
552 * @ip:
553 * @er:
554 *
555 * Returns: actual size of data on success, -errno on error
556 */
557
558int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
559{
560 struct gfs2_ea_location el;
561 int error;
562
563 if (!ip->i_di.di_eattr)
564 return -ENODATA;
565
566 error = gfs2_ea_find(ip, er, &el);
567 if (error)
568 return error;
569 if (!el.el_ea)
570 return -ENODATA;
571
572 if (er->er_data_len) {
573 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
574 error = -ERANGE;
575 else
576 error = gfs2_ea_get_copy(ip, &el, er->er_data);
577 }
578 if (!error)
579 error = GFS2_EA_DATA_LEN(el.el_ea);
580
581 brelse(el.el_bh);
582
583 return error;
584}
585
586/**
587 * gfs2_ea_get -
588 * @ip:
589 * @er:
590 *
591 * Returns: actual size of data on success, -errno on error
592 */
593
594int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
595{
596 struct gfs2_holder i_gh;
597 int error;
598
599 if (!er->er_name_len ||
600 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
601 return -EINVAL;
602 if (!er->er_data || !er->er_data_len) {
603 er->er_data = NULL;
604 er->er_data_len = 0;
605 }
606
607 error = gfs2_glock_nq_init(ip->i_gl,
608 LM_ST_SHARED, LM_FLAG_ANY,
609 &i_gh);
610 if (error)
611 return error;
612
613 error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
614
615 gfs2_glock_dq_uninit(&i_gh);
616
617 return error;
618}
619
620/**
621 * ea_alloc_blk - allocates a new block for extended attributes.
622 * @ip: A pointer to the inode that's getting extended attributes
623 * @bhp:
624 *
625 * Returns: errno
626 */
627
628static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
629{
630 struct gfs2_sbd *sdp = ip->i_sbd;
631 struct gfs2_ea_header *ea;
632 uint64_t block;
633
634 block = gfs2_alloc_meta(ip);
635
636 *bhp = gfs2_meta_new(ip->i_gl, block);
d4e9c4c3 637 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
b3b94faa
DT		 638 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
639 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
640
641 ea = GFS2_EA_BH2FIRST(*bhp);
642 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
643 ea->ea_type = GFS2_EATYPE_UNUSED;
644 ea->ea_flags = GFS2_EAFLAG_LAST;
645 ea->ea_num_ptrs = 0;
646
647 ip->i_di.di_blocks++;
648
649 return 0;
650}
651
652/**
653 * ea_write - writes the request info to an ea, creating new blocks if
654 * necessary
655 * @ip: inode that is being modified
656 * @ea: the location of the new ea in a block
657 * @er: the write request
658 *
659 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
660 *
661 * returns : errno
662 */
663
664static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
665 struct gfs2_ea_request *er)
666{
667 struct gfs2_sbd *sdp = ip->i_sbd;
668
669 ea->ea_data_len = cpu_to_be32(er->er_data_len);
670 ea->ea_name_len = er->er_name_len;
671 ea->ea_type = er->er_type;
672 ea->__pad = 0;
673
674 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
675
676 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
677 ea->ea_num_ptrs = 0;
678 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
679 } else {
680 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
681 const char *data = er->er_data;
682 unsigned int data_len = er->er_data_len;
683 unsigned int copy;
684 unsigned int x;
685
5c676f6d 686 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
b3b94faa
DT		 687 for (x = 0; x < ea->ea_num_ptrs; x++) {
688 struct buffer_head *bh;
689 uint64_t block;
690 int mh_size = sizeof(struct gfs2_meta_header);
691
692 block = gfs2_alloc_meta(ip);
693
694 bh = gfs2_meta_new(ip->i_gl, block);
d4e9c4c3 695 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 696 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
697
698 ip->i_di.di_blocks++;
699
700 copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
701 data_len;
702 memcpy(bh->b_data + mh_size, data, copy);
703 if (copy < sdp->sd_jbsize)
704 memset(bh->b_data + mh_size + copy, 0,
705 sdp->sd_jbsize - copy);
706
707 *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
708 data += copy;
709 data_len -= copy;
710
711 brelse(bh);
712 }
713
714 gfs2_assert_withdraw(sdp, !data_len);
715 }
716
717 return 0;
718}
719
720typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
721 struct gfs2_ea_request *er,
722 void *private);
723
724static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
725 unsigned int blks,
726 ea_skeleton_call_t skeleton_call,
727 void *private)
728{
729 struct gfs2_alloc *al;
730 struct buffer_head *dibh;
731 int error;
732
733 al = gfs2_alloc_get(ip);
734
735 error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
736 if (error)
737 goto out;
738
739 error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
740 if (error)
741 goto out_gunlock_q;
742
743 al->al_requested = blks;
744
745 error = gfs2_inplace_reserve(ip);
746 if (error)
747 goto out_gunlock_q;
748
749 error = gfs2_trans_begin(ip->i_sbd,
750 blks + al->al_rgd->rd_ri.ri_length +
751 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
752 if (error)
753 goto out_ipres;
754
755 error = skeleton_call(ip, er, private);
756 if (error)
757 goto out_end_trans;
758
759 error = gfs2_meta_inode_buffer(ip, &dibh);
760 if (!error) {
761 if (er->er_flags & GFS2_ERF_MODE) {
762 gfs2_assert_withdraw(ip->i_sbd,
763 (ip->i_di.di_mode & S_IFMT) ==
764 (er->er_mode & S_IFMT));
765 ip->i_di.di_mode = er->er_mode;
766 }
767 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 768 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 769 gfs2_dinode_out(&ip->i_di, dibh->b_data);
770 brelse(dibh);
771 }
772
773 out_end_trans:
774 gfs2_trans_end(ip->i_sbd);
775
776 out_ipres:
777 gfs2_inplace_release(ip);
778
779 out_gunlock_q:
780 gfs2_quota_unlock(ip);
781
782 out:
783 gfs2_alloc_put(ip);
784
785 return error;
786}
787
788static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
789 void *private)
790{
791 struct buffer_head *bh;
792 int error;
793
794 error = ea_alloc_blk(ip, &bh);
795 if (error)
796 return error;
797
798 ip->i_di.di_eattr = bh->b_blocknr;
799 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
800
801 brelse(bh);
802
803 return error;
804}
805
806/**
807 * ea_init - initializes a new eattr block
808 * @ip:
809 * @er:
810 *
811 * Returns: errno
812 */
813
814static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
815{
816 unsigned int jbsize = ip->i_sbd->sd_jbsize;
817 unsigned int blks = 1;
818
819 if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
5c676f6d 820 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
b3b94faa
DT		 821
822 return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
823}
824
825static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
826{
827 uint32_t ea_size = GFS2_EA_SIZE(ea);
568f4c96
SW		 828 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
829 ea_size);
b3b94faa
DT		 830 uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
831 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
832
833 ea->ea_rec_len = cpu_to_be32(ea_size);
834 ea->ea_flags ^= last;
835
836 new->ea_rec_len = cpu_to_be32(new_size);
837 new->ea_flags = last;
838
839 return new;
840}
841
842static void ea_set_remove_stuffed(struct gfs2_inode *ip,
843 struct gfs2_ea_location *el)
844{
845 struct gfs2_ea_header *ea = el->el_ea;
846 struct gfs2_ea_header *prev = el->el_prev;
847 uint32_t len;
848
d4e9c4c3 849 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 850
851 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
852 ea->ea_type = GFS2_EATYPE_UNUSED;
853 return;
854 } else if (GFS2_EA2NEXT(prev) != ea) {
855 prev = GFS2_EA2NEXT(prev);
856 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
857 }
858
859 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
860 prev->ea_rec_len = cpu_to_be32(len);
861
862 if (GFS2_EA_IS_LAST(ea))
863 prev->ea_flags |= GFS2_EAFLAG_LAST;
864}
865
866struct ea_set {
867 int ea_split;
868
869 struct gfs2_ea_request *es_er;
870 struct gfs2_ea_location *es_el;
871
872 struct buffer_head *es_bh;
873 struct gfs2_ea_header *es_ea;
874};
875
876static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
877 struct gfs2_ea_header *ea, struct ea_set *es)
878{
879 struct gfs2_ea_request *er = es->es_er;
880 struct buffer_head *dibh;
881 int error;
882
883 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
884 if (error)
885 return error;
886
d4e9c4c3 887 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 888
889 if (es->ea_split)
890 ea = ea_split_ea(ea);
891
892 ea_write(ip, ea, er);
893
894 if (es->es_el)
895 ea_set_remove_stuffed(ip, es->es_el);
896
897 error = gfs2_meta_inode_buffer(ip, &dibh);
898 if (error)
899 goto out;
900
901 if (er->er_flags & GFS2_ERF_MODE) {
902 gfs2_assert_withdraw(ip->i_sbd,
903 (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
904 ip->i_di.di_mode = er->er_mode;
905 }
906 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 907 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 908 gfs2_dinode_out(&ip->i_di, dibh->b_data);
909 brelse(dibh);
910 out:
911 gfs2_trans_end(ip->i_sbd);
912
913 return error;
914}
915
916static int ea_set_simple_alloc(struct gfs2_inode *ip,
917 struct gfs2_ea_request *er, void *private)
918{
919 struct ea_set *es = private;
920 struct gfs2_ea_header *ea = es->es_ea;
921 int error;
922
d4e9c4c3 923 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
b3b94faa
DT		 924
925 if (es->ea_split)
926 ea = ea_split_ea(ea);
927
928 error = ea_write(ip, ea, er);
929 if (error)
930 return error;
931
932 if (es->es_el)
933 ea_set_remove_stuffed(ip, es->es_el);
934
935 return 0;
936}
937
938static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
939 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
940 void *private)
941{
942 struct ea_set *es = private;
943 unsigned int size;
944 int stuffed;
945 int error;
946
947 stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size);
948
949 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
950 if (GFS2_EA_REC_LEN(ea) < size)
951 return 0;
952 if (!GFS2_EA_IS_STUFFED(ea)) {
953 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
954 if (error)
955 return error;
956 }
957 es->ea_split = 0;
958 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
959 es->ea_split = 1;
960 else
961 return 0;
962
963 if (stuffed) {
964 error = ea_set_simple_noalloc(ip, bh, ea, es);
965 if (error)
966 return error;
967 } else {
968 unsigned int blks;
969
970 es->es_bh = bh;
971 es->es_ea = ea;
5c676f6d
SW		 972 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
973 ip->i_sbd->sd_jbsize);
b3b94faa
DT		 974
975 error = ea_alloc_skeleton(ip, es->es_er, blks,
976 ea_set_simple_alloc, es);
977 if (error)
978 return error;
979 }
980
981 return 1;
982}
983
984static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
985 void *private)
986{
987 struct gfs2_sbd *sdp = ip->i_sbd;
988 struct buffer_head *indbh, *newbh;
989 uint64_t *eablk;
990 int error;
991 int mh_size = sizeof(struct gfs2_meta_header);
992
993 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
994 uint64_t *end;
995
996 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
997 DIO_START | DIO_WAIT, &indbh);
998 if (error)
999 return error;
1000
1001 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1002 error = -EIO;
1003 goto out;
1004 }
1005
1006 eablk = (uint64_t *)(indbh->b_data + mh_size);
1007 end = eablk + sdp->sd_inptrs;
1008
1009 for (; eablk < end; eablk++)
1010 if (!*eablk)
1011 break;
1012
1013 if (eablk == end) {
1014 error = -ENOSPC;
1015 goto out;
1016 }
1017
d4e9c4c3 1018 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 1019 } else {
1020 uint64_t blk;
1021
1022 blk = gfs2_alloc_meta(ip);
1023
1024 indbh = gfs2_meta_new(ip->i_gl, blk);
d4e9c4c3 1025 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 1026 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1027 gfs2_buffer_clear_tail(indbh, mh_size);
1028
1029 eablk = (uint64_t *)(indbh->b_data + mh_size);
1030 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1031 ip->i_di.di_eattr = blk;
1032 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1033 ip->i_di.di_blocks++;
1034
1035 eablk++;
1036 }
1037
1038 error = ea_alloc_blk(ip, &newbh);
1039 if (error)
1040 goto out;
1041
1042 *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1043 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1044 brelse(newbh);
1045 if (error)
1046 goto out;
1047
1048 if (private)
1049 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1050
1051 out:
1052 brelse(indbh);
1053
1054 return error;
1055}
1056
1057static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1058 struct gfs2_ea_location *el)
1059{
1060 struct ea_set es;
1061 unsigned int blks = 2;
1062 int error;
1063
1064 memset(&es, 0, sizeof(struct ea_set));
1065 es.es_er = er;
1066 es.es_el = el;
1067
1068 error = ea_foreach(ip, ea_set_simple, &es);
1069 if (error > 0)
1070 return 0;
1071 if (error)
1072 return error;
1073
1074 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1075 blks++;
1076 if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
5c676f6d 1077 blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize);
b3b94faa
DT		 1078
1079 return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1080}
1081
1082static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1083 struct gfs2_ea_location *el)
1084{
1085 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1086 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1087 gfs2_assert_withdraw(ip->i_sbd,
1088 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1089 }
1090
1091 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1092}
1093
1094int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1095{
1096 struct gfs2_ea_location el;
1097 int error;
1098
1099 if (!ip->i_di.di_eattr) {
1100 if (er->er_flags & XATTR_REPLACE)
1101 return -ENODATA;
1102 return ea_init(ip, er);
1103 }
1104
1105 error = gfs2_ea_find(ip, er, &el);
1106 if (error)
1107 return error;
1108
1109 if (el.el_ea) {
1110 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1111 brelse(el.el_bh);
1112 return -EPERM;
1113 }
1114
1115 error = -EEXIST;
1116 if (!(er->er_flags & XATTR_CREATE)) {
1117 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1118 error = ea_set_i(ip, er, &el);
1119 if (!error && unstuffed)
1120 ea_set_remove_unstuffed(ip, &el);
1121 }
1122
1123 brelse(el.el_bh);
1124 } else {
1125 error = -ENODATA;
1126 if (!(er->er_flags & XATTR_REPLACE))
1127 error = ea_set_i(ip, er, NULL);
1128 }
1129
1130 return error;
1131}
1132
1133int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1134{
1135 struct gfs2_holder i_gh;
1136 int error;
1137
1138 if (!er->er_name_len ||
1139 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1140 return -EINVAL;
1141 if (!er->er_data || !er->er_data_len) {
1142 er->er_data = NULL;
1143 er->er_data_len = 0;
1144 }
1145 error = ea_check_size(ip->i_sbd, er);
1146 if (error)
1147 return error;
1148
1149 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1150 if (error)
1151 return error;
1152
1153 if (IS_IMMUTABLE(ip->i_vnode))
1154 error = -EPERM;
1155 else
1156 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1157
1158 gfs2_glock_dq_uninit(&i_gh);
1159
1160 return error;
1161}
1162
1163static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1164{
1165 struct gfs2_ea_header *ea = el->el_ea;
1166 struct gfs2_ea_header *prev = el->el_prev;
1167 struct buffer_head *dibh;
1168 int error;
1169
1170 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1171 if (error)
1172 return error;
1173
d4e9c4c3 1174 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 1175
1176 if (prev) {
1177 uint32_t len;
1178
1179 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1180 prev->ea_rec_len = cpu_to_be32(len);
1181
1182 if (GFS2_EA_IS_LAST(ea))
1183 prev->ea_flags |= GFS2_EAFLAG_LAST;
1184 } else
1185 ea->ea_type = GFS2_EATYPE_UNUSED;
1186
1187 error = gfs2_meta_inode_buffer(ip, &dibh);
1188 if (!error) {
1189 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 1190 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1191 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1192 brelse(dibh);
1193 }
1194
1195 gfs2_trans_end(ip->i_sbd);
1196
1197 return error;
1198}
1199
1200int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1201{
1202 struct gfs2_ea_location el;
1203 int error;
1204
1205 if (!ip->i_di.di_eattr)
1206 return -ENODATA;
1207
1208 error = gfs2_ea_find(ip, er, &el);
1209 if (error)
1210 return error;
1211 if (!el.el_ea)
1212 return -ENODATA;
1213
1214 if (GFS2_EA_IS_STUFFED(el.el_ea))
1215 error = ea_remove_stuffed(ip, &el);
1216 else
1217 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1218 0);
1219
1220 brelse(el.el_bh);
1221
1222 return error;
1223}
1224
1225/**
1226 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1227 * @ip: pointer to the inode of the target file
1228 * @er: request information
1229 *
1230 * Returns: errno
1231 */
1232
1233int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1234{
1235 struct gfs2_holder i_gh;
1236 int error;
1237
1238 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1239 return -EINVAL;
1240
1241 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1242 if (error)
1243 return error;
1244
1245 if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1246 error = -EPERM;
1247 else
1248 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1249
1250 gfs2_glock_dq_uninit(&i_gh);
1251
1252 return error;
1253}
1254
1255static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1256 struct gfs2_ea_header *ea, char *data)
1257{
1258 struct gfs2_sbd *sdp = ip->i_sbd;
1259 struct buffer_head **bh;
1260 unsigned int amount = GFS2_EA_DATA_LEN(ea);
5c676f6d 1261 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
b3b94faa
DT		 1262 uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1263 unsigned int x;
1264 int error;
1265
1266 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1267 if (!bh)
1268 return -ENOMEM;
1269
1270 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1271 if (error)
1272 goto out;
1273
1274 for (x = 0; x < nptrs; x++) {
1275 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1276 DIO_START, bh + x);
1277 if (error) {
1278 while (x--)
1279 brelse(bh[x]);
1280 goto fail;
1281 }
1282 dataptrs++;
1283 }
1284
1285 for (x = 0; x < nptrs; x++) {
1286 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1287 if (error) {
1288 for (; x < nptrs; x++)
1289 brelse(bh[x]);
1290 goto fail;
1291 }
1292 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1293 for (; x < nptrs; x++)
1294 brelse(bh[x]);
1295 error = -EIO;
1296 goto fail;
1297 }
1298
d4e9c4c3 1299 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
b3b94faa
DT		 1300
1301 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1302 data,
1303 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1304
1305 amount -= sdp->sd_jbsize;
1306 data += sdp->sd_jbsize;
1307
1308 brelse(bh[x]);
1309 }
1310
1311 out:
1312 kfree(bh);
1313
1314 return error;
1315
1316 fail:
1317 gfs2_trans_end(sdp);
1318 kfree(bh);
1319
1320 return error;
1321}
1322
1323int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1324 struct iattr *attr, char *data)
1325{
1326 struct buffer_head *dibh;
1327 int error;
1328
1329 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1330 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1331 if (error)
1332 return error;
1333
d4e9c4c3 1334 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 1335 memcpy(GFS2_EA2DATA(el->el_ea),
1336 data,
1337 GFS2_EA_DATA_LEN(el->el_ea));
1338 } else
1339 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1340
1341 if (error)
1342 return error;
1343
1344 error = gfs2_meta_inode_buffer(ip, &dibh);
1345 if (!error) {
1346 error = inode_setattr(ip->i_vnode, attr);
1347 gfs2_assert_warn(ip->i_sbd, !error);
1348 gfs2_inode_attr_out(ip);
d4e9c4c3 1349 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1350 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1351 brelse(dibh);
1352 }
1353
1354 gfs2_trans_end(ip->i_sbd);
1355
1356 return error;
1357}
1358
1359static int ea_dealloc_indirect(struct gfs2_inode *ip)
1360{
1361 struct gfs2_sbd *sdp = ip->i_sbd;
1362 struct gfs2_rgrp_list rlist;
1363 struct buffer_head *indbh, *dibh;
1364 uint64_t *eablk, *end;
1365 unsigned int rg_blocks = 0;
1366 uint64_t bstart = 0;
1367 unsigned int blen = 0;
1368 unsigned int blks = 0;
1369 unsigned int x;
1370 int error;
1371
1372 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1373
1374 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1375 DIO_START | DIO_WAIT, &indbh);
1376 if (error)
1377 return error;
1378
1379 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1380 error = -EIO;
1381 goto out;
1382 }
1383
1384 eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1385 end = eablk + sdp->sd_inptrs;
1386
1387 for (; eablk < end; eablk++) {
1388 uint64_t bn;
1389
1390 if (!*eablk)
1391 break;
1392 bn = be64_to_cpu(*eablk);
1393
1394 if (bstart + blen == bn)
1395 blen++;
1396 else {
1397 if (bstart)
1398 gfs2_rlist_add(sdp, &rlist, bstart);
1399 bstart = bn;
1400 blen = 1;
1401 }
1402 blks++;
1403 }
1404 if (bstart)
1405 gfs2_rlist_add(sdp, &rlist, bstart);
1406 else
1407 goto out;
1408
1409 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1410
1411 for (x = 0; x < rlist.rl_rgrps; x++) {
1412 struct gfs2_rgrpd *rgd;
5c676f6d 1413 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
b3b94faa
DT		 1414 rg_blocks += rgd->rd_ri.ri_length;
1415 }
1416
1417 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1418 if (error)
1419 goto out_rlist_free;
1420
1421 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1422 RES_INDIRECT + RES_STATFS +
1423 RES_QUOTA, blks);
1424 if (error)
1425 goto out_gunlock;
1426
d4e9c4c3 1427 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 1428
1429 eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1430 bstart = 0;
1431 blen = 0;
1432
1433 for (; eablk < end; eablk++) {
1434 uint64_t bn;
1435
1436 if (!*eablk)
1437 break;
1438 bn = be64_to_cpu(*eablk);
1439
1440 if (bstart + blen == bn)
1441 blen++;
1442 else {
1443 if (bstart)
1444 gfs2_free_meta(ip, bstart, blen);
1445 bstart = bn;
1446 blen = 1;
1447 }
1448
1449 *eablk = 0;
1450 if (!ip->i_di.di_blocks)
1451 gfs2_consist_inode(ip);
1452 ip->i_di.di_blocks--;
1453 }
1454 if (bstart)
1455 gfs2_free_meta(ip, bstart, blen);
1456
1457 ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1458
1459 error = gfs2_meta_inode_buffer(ip, &dibh);
1460 if (!error) {
d4e9c4c3 1461 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1462 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1463 brelse(dibh);
1464 }
1465
1466 gfs2_trans_end(sdp);
1467
1468 out_gunlock:
1469 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1470
1471 out_rlist_free:
1472 gfs2_rlist_free(&rlist);
1473
1474 out:
1475 brelse(indbh);
1476
1477 return error;
1478}
1479
1480static int ea_dealloc_block(struct gfs2_inode *ip)
1481{
1482 struct gfs2_sbd *sdp = ip->i_sbd;
1483 struct gfs2_alloc *al = &ip->i_alloc;
1484 struct gfs2_rgrpd *rgd;
1485 struct buffer_head *dibh;
1486 int error;
1487
1488 rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1489 if (!rgd) {
1490 gfs2_consist_inode(ip);
1491 return -EIO;
1492 }
1493
1494 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1495 &al->al_rgd_gh);
1496 if (error)
1497 return error;
1498
1499 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1500 RES_STATFS + RES_QUOTA, 1);
1501 if (error)
1502 goto out_gunlock;
1503
1504 gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1505
1506 ip->i_di.di_eattr = 0;
1507 if (!ip->i_di.di_blocks)
1508 gfs2_consist_inode(ip);
1509 ip->i_di.di_blocks--;
1510
1511 error = gfs2_meta_inode_buffer(ip, &dibh);
1512 if (!error) {
d4e9c4c3 1513 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1514 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1515 brelse(dibh);
1516 }
1517
1518 gfs2_trans_end(sdp);
1519
1520 out_gunlock:
1521 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1522
1523 return error;
1524}
1525
1526/**
1527 * gfs2_ea_dealloc - deallocate the extended attribute fork
1528 * @ip: the inode
1529 *
1530 * Returns: errno
1531 */
1532
1533int gfs2_ea_dealloc(struct gfs2_inode *ip)
1534{
1535 struct gfs2_alloc *al;
1536 int error;
1537
1538 al = gfs2_alloc_get(ip);
1539
1540 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1541 if (error)
1542 goto out_alloc;
1543
1544 error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1545 if (error)
1546 goto out_quota;
1547
1548 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1549 if (error)
1550 goto out_rindex;
1551
1552 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1553 error = ea_dealloc_indirect(ip);
1554 if (error)
1555 goto out_rindex;
1556 }
1557
1558 error = ea_dealloc_block(ip);
1559
1560 out_rindex:
1561 gfs2_glock_dq_uninit(&al->al_ri_gh);
1562
1563 out_quota:
1564 gfs2_quota_unhold(ip);
1565
1566 out_alloc:
1567 gfs2_alloc_put(ip);
1568
1569 return error;
1570}
1571
Linux kernel - Deliverables
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