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[GFS2] split and annotate gfs2_quota_change
[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
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>
7d308590 17#include <linux/lm_interface.h>
b3b94faa
DT		 18#include <asm/uaccess.h>
19
20#include "gfs2.h"
5c676f6d 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
cca195c5 71typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
b3b94faa 72 struct gfs2_ea_header *ea,
cca195c5 73 struct gfs2_ea_header *prev, void *private);
b3b94faa
DT		 74
75static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
76 ea_call_t ea_call, void *data)
77{
78 struct gfs2_ea_header *ea, *prev = NULL;
79 int error = 0;
80
feaa7bba 81 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_EA))
b3b94faa
DT		 82 return -EIO;
83
84 for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
85 if (!GFS2_EA_REC_LEN(ea))
86 goto fail;
cca195c5
SW		 87 if (!(bh->b_data <= (char *)ea && (char *)GFS2_EA2NEXT(ea) <=
88 bh->b_data + bh->b_size))
b3b94faa
DT		 89 goto fail;
90 if (!GFS2_EATYPE_VALID(ea->ea_type))
91 goto fail;
92
93 error = ea_call(ip, bh, ea, prev, data);
94 if (error)
95 return error;
96
97 if (GFS2_EA_IS_LAST(ea)) {
98 if ((char *)GFS2_EA2NEXT(ea) !=
99 bh->b_data + bh->b_size)
100 goto fail;
101 break;
102 }
103 }
104
105 return error;
106
a91ea69f 107fail:
b3b94faa
DT		 108 gfs2_consist_inode(ip);
109 return -EIO;
110}
111
112static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
113{
114 struct buffer_head *bh, *eabh;
cd915493 115 u64 *eablk, *end;
b3b94faa
DT		 116 int error;
117
7276b3b0 118 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, DIO_WAIT, &bh);
b3b94faa
DT		 119 if (error)
120 return error;
121
122 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
123 error = ea_foreach_i(ip, bh, ea_call, data);
124 goto out;
125 }
126
feaa7bba 127 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
b3b94faa
DT		 128 error = -EIO;
129 goto out;
130 }
131
cd915493 132 eablk = (u64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
feaa7bba 133 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
b3b94faa
DT		 134
135 for (; eablk < end; eablk++) {
cd915493 136 u64 bn;
b3b94faa
DT		 137
138 if (!*eablk)
139 break;
140 bn = be64_to_cpu(*eablk);
141
7276b3b0 142 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh);
b3b94faa
DT		 143 if (error)
144 break;
145 error = ea_foreach_i(ip, eabh, ea_call, data);
146 brelse(eabh);
147 if (error)
148 break;
149 }
a91ea69f 150out:
b3b94faa 151 brelse(bh);
b3b94faa
DT		 152 return error;
153}
154
155struct ea_find {
156 struct gfs2_ea_request *ef_er;
157 struct gfs2_ea_location *ef_el;
158};
159
160static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
161 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
162 void *private)
163{
164 struct ea_find *ef = private;
165 struct gfs2_ea_request *er = ef->ef_er;
166
167 if (ea->ea_type == GFS2_EATYPE_UNUSED)
168 return 0;
169
170 if (ea->ea_type == er->er_type) {
171 if (ea->ea_name_len == er->er_name_len &&
172 !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
173 struct gfs2_ea_location *el = ef->ef_el;
174 get_bh(bh);
175 el->el_bh = bh;
176 el->el_ea = ea;
177 el->el_prev = prev;
178 return 1;
179 }
180 }
181
b3b94faa
DT		 182 return 0;
183}
184
185int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
186 struct gfs2_ea_location *el)
187{
188 struct ea_find ef;
189 int error;
190
191 ef.ef_er = er;
192 ef.ef_el = el;
193
194 memset(el, 0, sizeof(struct gfs2_ea_location));
195
196 error = ea_foreach(ip, ea_find_i, &ef);
197 if (error > 0)
198 return 0;
199
200 return error;
201}
202
203/**
204 * ea_dealloc_unstuffed -
205 * @ip:
206 * @bh:
207 * @ea:
208 * @prev:
209 * @private:
210 *
211 * Take advantage of the fact that all unstuffed blocks are
212 * allocated from the same RG. But watch, this may not always
213 * be true.
214 *
215 * Returns: errno
216 */
217
218static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
219 struct gfs2_ea_header *ea,
220 struct gfs2_ea_header *prev, void *private)
221{
222 int *leave = private;
feaa7bba 223 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 224 struct gfs2_rgrpd *rgd;
225 struct gfs2_holder rg_gh;
226 struct buffer_head *dibh;
cd915493
SW		 227 u64 *dataptrs, bn = 0;
228 u64 bstart = 0;
b3b94faa
DT		 229 unsigned int blen = 0;
230 unsigned int blks = 0;
231 unsigned int x;
232 int error;
233
234 if (GFS2_EA_IS_STUFFED(ea))
235 return 0;
236
237 dataptrs = GFS2_EA2DATAPTRS(ea);
cca195c5 238 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
b3b94faa
DT		 239 if (*dataptrs) {
240 blks++;
241 bn = be64_to_cpu(*dataptrs);
242 }
cca195c5 243 }
b3b94faa
DT		 244 if (!blks)
245 return 0;
246
247 rgd = gfs2_blk2rgrpd(sdp, bn);
248 if (!rgd) {
249 gfs2_consist_inode(ip);
250 return -EIO;
251 }
252
253 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
254 if (error)
255 return error;
256
cca195c5
SW		 257 error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length + RES_DINODE +
258 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
b3b94faa
DT		 259 if (error)
260 goto out_gunlock;
261
d4e9c4c3 262 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 263
264 dataptrs = GFS2_EA2DATAPTRS(ea);
265 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
266 if (!*dataptrs)
267 break;
268 bn = be64_to_cpu(*dataptrs);
269
270 if (bstart + blen == bn)
271 blen++;
272 else {
273 if (bstart)
274 gfs2_free_meta(ip, bstart, blen);
275 bstart = bn;
276 blen = 1;
277 }
278
279 *dataptrs = 0;
280 if (!ip->i_di.di_blocks)
281 gfs2_consist_inode(ip);
282 ip->i_di.di_blocks--;
283 }
284 if (bstart)
285 gfs2_free_meta(ip, bstart, blen);
286
287 if (prev && !leave) {
cd915493 288 u32 len;
b3b94faa
DT		 289
290 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
291 prev->ea_rec_len = cpu_to_be32(len);
292
293 if (GFS2_EA_IS_LAST(ea))
294 prev->ea_flags |= GFS2_EAFLAG_LAST;
295 } else {
296 ea->ea_type = GFS2_EATYPE_UNUSED;
297 ea->ea_num_ptrs = 0;
298 }
299
300 error = gfs2_meta_inode_buffer(ip, &dibh);
301 if (!error) {
302 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 303 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 304 gfs2_dinode_out(&ip->i_di, dibh->b_data);
305 brelse(dibh);
306 }
307
308 gfs2_trans_end(sdp);
309
a91ea69f 310out_gunlock:
b3b94faa 311 gfs2_glock_dq_uninit(&rg_gh);
b3b94faa
DT		 312 return error;
313}
314
315static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
316 struct gfs2_ea_header *ea,
317 struct gfs2_ea_header *prev, int leave)
318{
319 struct gfs2_alloc *al;
320 int error;
321
322 al = gfs2_alloc_get(ip);
323
324 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
325 if (error)
326 goto out_alloc;
327
feaa7bba 328 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
b3b94faa
DT		 329 if (error)
330 goto out_quota;
331
cca195c5 332 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
b3b94faa
DT		 333
334 gfs2_glock_dq_uninit(&al->al_ri_gh);
335
a91ea69f 336out_quota:
b3b94faa 337 gfs2_quota_unhold(ip);
a91ea69f 338out_alloc:
b3b94faa 339 gfs2_alloc_put(ip);
b3b94faa
DT		 340 return error;
341}
342
b3b94faa
DT		 343struct ea_list {
344 struct gfs2_ea_request *ei_er;
345 unsigned int ei_size;
346};
347
348static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
349 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
350 void *private)
351{
352 struct ea_list *ei = private;
353 struct gfs2_ea_request *er = ei->ei_er;
639b6d79 354 unsigned int ea_size = gfs2_ea_strlen(ea);
b3b94faa
DT		 355
356 if (ea->ea_type == GFS2_EATYPE_UNUSED)
357 return 0;
358
359 if (er->er_data_len) {
01eb7c07
SW		 360 char *prefix = NULL;
361 unsigned int l = 0;
b3b94faa
DT		 362 char c = 0;
363
364 if (ei->ei_size + ea_size > er->er_data_len)
365 return -ERANGE;
366
639b6d79
RH		 367 switch (ea->ea_type) {
368 case GFS2_EATYPE_USR:
b3b94faa
DT		 369 prefix = "user.";
370 l = 5;
639b6d79
RH		 371 break;
372 case GFS2_EATYPE_SYS:
b3b94faa
DT		 373 prefix = "system.";
374 l = 7;
639b6d79
RH		 375 break;
376 case GFS2_EATYPE_SECURITY:
377 prefix = "security.";
378 l = 9;
379 break;
b3b94faa
DT		 380 }
381
01eb7c07
SW		 382 BUG_ON(l == 0);
383
90cdd208
SW		 384 memcpy(er->er_data + ei->ei_size, prefix, l);
385 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
b3b94faa 386 ea->ea_name_len);
90cdd208 387 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
b3b94faa
DT		 388 }
389
390 ei->ei_size += ea_size;
391
392 return 0;
393}
394
395/**
396 * gfs2_ea_list -
397 * @ip:
398 * @er:
399 *
400 * Returns: actual size of data on success, -errno on error
401 */
402
403int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
404{
405 struct gfs2_holder i_gh;
406 int error;
407
408 if (!er->er_data || !er->er_data_len) {
409 er->er_data = NULL;
410 er->er_data_len = 0;
411 }
412
cca195c5 413 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
b3b94faa
DT		 414 if (error)
415 return error;
416
417 if (ip->i_di.di_eattr) {
418 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
419
420 error = ea_foreach(ip, ea_list_i, &ei);
421 if (!error)
422 error = ei.ei_size;
423 }
424
425 gfs2_glock_dq_uninit(&i_gh);
426
427 return error;
428}
429
430/**
431 * ea_get_unstuffed - actually copies the unstuffed data into the
432 * request buffer
cca195c5
SW		 433 * @ip: The GFS2 inode
434 * @ea: The extended attribute header structure
435 * @data: The data to be copied
b3b94faa
DT		 436 *
437 * Returns: errno
438 */
439
440static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
441 char *data)
442{
feaa7bba 443 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 444 struct buffer_head **bh;
445 unsigned int amount = GFS2_EA_DATA_LEN(ea);
5c676f6d 446 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
cd915493 447 u64 *dataptrs = GFS2_EA2DATAPTRS(ea);
b3b94faa
DT		 448 unsigned int x;
449 int error = 0;
450
451 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
452 if (!bh)
453 return -ENOMEM;
454
455 for (x = 0; x < nptrs; x++) {
7276b3b0
SW		 456 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
457 bh + x);
b3b94faa
DT		 458 if (error) {
459 while (x--)
460 brelse(bh[x]);
461 goto out;
462 }
463 dataptrs++;
464 }
465
466 for (x = 0; x < nptrs; x++) {
7276b3b0 467 error = gfs2_meta_wait(sdp, bh[x]);
b3b94faa
DT		 468 if (error) {
469 for (; x < nptrs; x++)
470 brelse(bh[x]);
471 goto out;
472 }
473 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
474 for (; x < nptrs; x++)
475 brelse(bh[x]);
476 error = -EIO;
477 goto out;
478 }
479
cca195c5 480 memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
b3b94faa
DT		 481 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
482
483 amount -= sdp->sd_jbsize;
484 data += sdp->sd_jbsize;
485
486 brelse(bh[x]);
487 }
488
a91ea69f 489out:
b3b94faa 490 kfree(bh);
b3b94faa
DT		 491 return error;
492}
493
494int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
495 char *data)
496{
497 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
cca195c5 498 memcpy(data, GFS2_EA2DATA(el->el_ea), GFS2_EA_DATA_LEN(el->el_ea));
b3b94faa
DT		 499 return 0;
500 } else
501 return ea_get_unstuffed(ip, el->el_ea, data);
502}
503
504/**
505 * gfs2_ea_get_i -
cca195c5
SW		 506 * @ip: The GFS2 inode
507 * @er: The request structure
b3b94faa
DT		 508 *
509 * Returns: actual size of data on success, -errno on error
510 */
511
512int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
513{
514 struct gfs2_ea_location el;
515 int error;
516
517 if (!ip->i_di.di_eattr)
518 return -ENODATA;
519
520 error = gfs2_ea_find(ip, er, &el);
521 if (error)
522 return error;
523 if (!el.el_ea)
524 return -ENODATA;
525
526 if (er->er_data_len) {
527 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
528 error = -ERANGE;
529 else
530 error = gfs2_ea_get_copy(ip, &el, er->er_data);
531 }
532 if (!error)
533 error = GFS2_EA_DATA_LEN(el.el_ea);
534
535 brelse(el.el_bh);
536
537 return error;
538}
539
540/**
541 * gfs2_ea_get -
cca195c5
SW		 542 * @ip: The GFS2 inode
543 * @er: The request structure
b3b94faa
DT		 544 *
545 * Returns: actual size of data on success, -errno on error
546 */
547
548int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
549{
550 struct gfs2_holder i_gh;
551 int error;
552
553 if (!er->er_name_len ||
554 er->er_name_len > GFS2_EA_MAX_NAME_LEN)
555 return -EINVAL;
556 if (!er->er_data || !er->er_data_len) {
557 er->er_data = NULL;
558 er->er_data_len = 0;
559 }
560
cca195c5 561 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
b3b94faa
DT		 562 if (error)
563 return error;
564
565 error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
566
567 gfs2_glock_dq_uninit(&i_gh);
568
569 return error;
570}
571
572/**
573 * ea_alloc_blk - allocates a new block for extended attributes.
574 * @ip: A pointer to the inode that's getting extended attributes
cca195c5 575 * @bhp: Pointer to pointer to a struct buffer_head
b3b94faa
DT		 576 *
577 * Returns: errno
578 */
579
580static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
581{
feaa7bba 582 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa 583 struct gfs2_ea_header *ea;
cd915493 584 u64 block;
b3b94faa
DT		 585
586 block = gfs2_alloc_meta(ip);
587
588 *bhp = gfs2_meta_new(ip->i_gl, block);
d4e9c4c3 589 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
b3b94faa
DT		 590 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
591 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
592
593 ea = GFS2_EA_BH2FIRST(*bhp);
594 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
595 ea->ea_type = GFS2_EATYPE_UNUSED;
596 ea->ea_flags = GFS2_EAFLAG_LAST;
597 ea->ea_num_ptrs = 0;
598
599 ip->i_di.di_blocks++;
600
601 return 0;
602}
603
604/**
605 * ea_write - writes the request info to an ea, creating new blocks if
606 * necessary
cca195c5
SW		 607 * @ip: inode that is being modified
608 * @ea: the location of the new ea in a block
b3b94faa
DT		 609 * @er: the write request
610 *
611 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
612 *
613 * returns : errno
614 */
615
616static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
617 struct gfs2_ea_request *er)
618{
feaa7bba 619 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 620
621 ea->ea_data_len = cpu_to_be32(er->er_data_len);
622 ea->ea_name_len = er->er_name_len;
623 ea->ea_type = er->er_type;
624 ea->__pad = 0;
625
626 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
627
628 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
629 ea->ea_num_ptrs = 0;
630 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
631 } else {
cd915493 632 u64 *dataptr = GFS2_EA2DATAPTRS(ea);
b3b94faa
DT		 633 const char *data = er->er_data;
634 unsigned int data_len = er->er_data_len;
635 unsigned int copy;
636 unsigned int x;
637
5c676f6d 638 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
b3b94faa
DT		 639 for (x = 0; x < ea->ea_num_ptrs; x++) {
640 struct buffer_head *bh;
cd915493 641 u64 block;
b3b94faa
DT		 642 int mh_size = sizeof(struct gfs2_meta_header);
643
644 block = gfs2_alloc_meta(ip);
645
646 bh = gfs2_meta_new(ip->i_gl, block);
d4e9c4c3 647 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 648 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
649
650 ip->i_di.di_blocks++;
651
cca195c5
SW		 652 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
653 data_len;
b3b94faa
DT		 654 memcpy(bh->b_data + mh_size, data, copy);
655 if (copy < sdp->sd_jbsize)
656 memset(bh->b_data + mh_size + copy, 0,
657 sdp->sd_jbsize - copy);
658
cca195c5 659 *dataptr++ = cpu_to_be64(bh->b_blocknr);
b3b94faa
DT		 660 data += copy;
661 data_len -= copy;
662
663 brelse(bh);
664 }
665
666 gfs2_assert_withdraw(sdp, !data_len);
667 }
668
669 return 0;
670}
671
672typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
cca195c5 673 struct gfs2_ea_request *er, void *private);
b3b94faa
DT		 674
675static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
676 unsigned int blks,
cca195c5 677 ea_skeleton_call_t skeleton_call, void *private)
b3b94faa
DT		 678{
679 struct gfs2_alloc *al;
680 struct buffer_head *dibh;
681 int error;
682
683 al = gfs2_alloc_get(ip);
684
685 error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
686 if (error)
687 goto out;
688
689 error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
690 if (error)
691 goto out_gunlock_q;
692
693 al->al_requested = blks;
694
695 error = gfs2_inplace_reserve(ip);
696 if (error)
697 goto out_gunlock_q;
698
feaa7bba 699 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
b3b94faa
DT		 700 blks + al->al_rgd->rd_ri.ri_length +
701 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
702 if (error)
703 goto out_ipres;
704
705 error = skeleton_call(ip, er, private);
706 if (error)
707 goto out_end_trans;
708
709 error = gfs2_meta_inode_buffer(ip, &dibh);
710 if (!error) {
711 if (er->er_flags & GFS2_ERF_MODE) {
feaa7bba 712 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
b3b94faa
DT		 713 (ip->i_di.di_mode & S_IFMT) ==
714 (er->er_mode & S_IFMT));
715 ip->i_di.di_mode = er->er_mode;
716 }
717 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 718 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 719 gfs2_dinode_out(&ip->i_di, dibh->b_data);
720 brelse(dibh);
721 }
722
a91ea69f 723out_end_trans:
feaa7bba 724 gfs2_trans_end(GFS2_SB(&ip->i_inode));
a91ea69f 725out_ipres:
b3b94faa 726 gfs2_inplace_release(ip);
a91ea69f 727out_gunlock_q:
b3b94faa 728 gfs2_quota_unlock(ip);
a91ea69f 729out:
b3b94faa 730 gfs2_alloc_put(ip);
b3b94faa
DT		 731 return error;
732}
733
734static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
735 void *private)
736{
737 struct buffer_head *bh;
738 int error;
739
740 error = ea_alloc_blk(ip, &bh);
741 if (error)
742 return error;
743
744 ip->i_di.di_eattr = bh->b_blocknr;
745 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
746
747 brelse(bh);
748
749 return error;
750}
751
752/**
753 * ea_init - initializes a new eattr block
754 * @ip:
755 * @er:
756 *
757 * Returns: errno
758 */
759
760static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
761{
feaa7bba 762 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
b3b94faa
DT		 763 unsigned int blks = 1;
764
765 if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
5c676f6d 766 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
b3b94faa
DT		 767
768 return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
769}
770
771static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
772{
cd915493 773 u32 ea_size = GFS2_EA_SIZE(ea);
568f4c96
SW		 774 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
775 ea_size);
cd915493 776 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
b3b94faa
DT		 777 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
778
779 ea->ea_rec_len = cpu_to_be32(ea_size);
780 ea->ea_flags ^= last;
781
782 new->ea_rec_len = cpu_to_be32(new_size);
783 new->ea_flags = last;
784
785 return new;
786}
787
788static void ea_set_remove_stuffed(struct gfs2_inode *ip,
789 struct gfs2_ea_location *el)
790{
791 struct gfs2_ea_header *ea = el->el_ea;
792 struct gfs2_ea_header *prev = el->el_prev;
cd915493 793 u32 len;
b3b94faa 794
d4e9c4c3 795 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 796
797 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
798 ea->ea_type = GFS2_EATYPE_UNUSED;
799 return;
800 } else if (GFS2_EA2NEXT(prev) != ea) {
801 prev = GFS2_EA2NEXT(prev);
feaa7bba 802 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
b3b94faa
DT		 803 }
804
805 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
806 prev->ea_rec_len = cpu_to_be32(len);
807
808 if (GFS2_EA_IS_LAST(ea))
809 prev->ea_flags |= GFS2_EAFLAG_LAST;
810}
811
812struct ea_set {
813 int ea_split;
814
815 struct gfs2_ea_request *es_er;
816 struct gfs2_ea_location *es_el;
817
818 struct buffer_head *es_bh;
819 struct gfs2_ea_header *es_ea;
820};
821
822static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
823 struct gfs2_ea_header *ea, struct ea_set *es)
824{
825 struct gfs2_ea_request *er = es->es_er;
826 struct buffer_head *dibh;
827 int error;
828
feaa7bba 829 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
b3b94faa
DT		 830 if (error)
831 return error;
832
d4e9c4c3 833 gfs2_trans_add_bh(ip->i_gl, bh, 1);
b3b94faa
DT		 834
835 if (es->ea_split)
836 ea = ea_split_ea(ea);
837
838 ea_write(ip, ea, er);
839
840 if (es->es_el)
841 ea_set_remove_stuffed(ip, es->es_el);
842
843 error = gfs2_meta_inode_buffer(ip, &dibh);
844 if (error)
845 goto out;
846
847 if (er->er_flags & GFS2_ERF_MODE) {
feaa7bba 848 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
b3b94faa
DT		 849 (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
850 ip->i_di.di_mode = er->er_mode;
851 }
852 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 853 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 854 gfs2_dinode_out(&ip->i_di, dibh->b_data);
855 brelse(dibh);
a91ea69f 856out:
feaa7bba 857 gfs2_trans_end(GFS2_SB(&ip->i_inode));
b3b94faa
DT		 858 return error;
859}
860
861static int ea_set_simple_alloc(struct gfs2_inode *ip,
862 struct gfs2_ea_request *er, void *private)
863{
864 struct ea_set *es = private;
865 struct gfs2_ea_header *ea = es->es_ea;
866 int error;
867
d4e9c4c3 868 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
b3b94faa
DT		 869
870 if (es->ea_split)
871 ea = ea_split_ea(ea);
872
873 error = ea_write(ip, ea, er);
874 if (error)
875 return error;
876
877 if (es->es_el)
878 ea_set_remove_stuffed(ip, es->es_el);
879
880 return 0;
881}
882
883static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
884 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
885 void *private)
886{
887 struct ea_set *es = private;
888 unsigned int size;
889 int stuffed;
890 int error;
891
feaa7bba 892 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er, &size);
b3b94faa
DT		 893
894 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
895 if (GFS2_EA_REC_LEN(ea) < size)
896 return 0;
897 if (!GFS2_EA_IS_STUFFED(ea)) {
898 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
899 if (error)
900 return error;
901 }
902 es->ea_split = 0;
903 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
904 es->ea_split = 1;
905 else
906 return 0;
907
908 if (stuffed) {
909 error = ea_set_simple_noalloc(ip, bh, ea, es);
910 if (error)
911 return error;
912 } else {
913 unsigned int blks;
914
915 es->es_bh = bh;
916 es->es_ea = ea;
5c676f6d 917 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
feaa7bba 918 GFS2_SB(&ip->i_inode)->sd_jbsize);
b3b94faa
DT		 919
920 error = ea_alloc_skeleton(ip, es->es_er, blks,
921 ea_set_simple_alloc, es);
922 if (error)
923 return error;
924 }
925
926 return 1;
927}
928
929static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
930 void *private)
931{
feaa7bba 932 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa 933 struct buffer_head *indbh, *newbh;
cd915493 934 u64 *eablk;
b3b94faa
DT		 935 int error;
936 int mh_size = sizeof(struct gfs2_meta_header);
937
938 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
cd915493 939 u64 *end;
b3b94faa 940
7276b3b0
SW		 941 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, DIO_WAIT,
942 &indbh);
b3b94faa
DT		 943 if (error)
944 return error;
945
946 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
947 error = -EIO;
948 goto out;
949 }
950
cd915493 951 eablk = (u64 *)(indbh->b_data + mh_size);
b3b94faa
DT		 952 end = eablk + sdp->sd_inptrs;
953
954 for (; eablk < end; eablk++)
955 if (!*eablk)
956 break;
957
958 if (eablk == end) {
959 error = -ENOSPC;
960 goto out;
961 }
962
d4e9c4c3 963 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa 964 } else {
cd915493 965 u64 blk;
b3b94faa
DT		 966
967 blk = gfs2_alloc_meta(ip);
968
969 indbh = gfs2_meta_new(ip->i_gl, blk);
d4e9c4c3 970 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa
DT		 971 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
972 gfs2_buffer_clear_tail(indbh, mh_size);
973
cd915493 974 eablk = (u64 *)(indbh->b_data + mh_size);
b3b94faa
DT		 975 *eablk = cpu_to_be64(ip->i_di.di_eattr);
976 ip->i_di.di_eattr = blk;
977 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
978 ip->i_di.di_blocks++;
979
980 eablk++;
981 }
982
983 error = ea_alloc_blk(ip, &newbh);
984 if (error)
985 goto out;
986
cd915493 987 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
b3b94faa
DT		 988 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
989 brelse(newbh);
990 if (error)
991 goto out;
992
993 if (private)
cca195c5 994 ea_set_remove_stuffed(ip, private);
b3b94faa 995
a91ea69f 996out:
b3b94faa 997 brelse(indbh);
b3b94faa
DT		 998 return error;
999}
1000
1001static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1002 struct gfs2_ea_location *el)
1003{
1004 struct ea_set es;
1005 unsigned int blks = 2;
1006 int error;
1007
1008 memset(&es, 0, sizeof(struct ea_set));
1009 es.es_er = er;
1010 es.es_el = el;
1011
1012 error = ea_foreach(ip, ea_set_simple, &es);
1013 if (error > 0)
1014 return 0;
1015 if (error)
1016 return error;
1017
1018 if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1019 blks++;
feaa7bba
SW		 1020 if (GFS2_EAREQ_SIZE_STUFFED(er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1021 blks += DIV_ROUND_UP(er->er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
b3b94faa
DT		 1022
1023 return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1024}
1025
1026static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1027 struct gfs2_ea_location *el)
1028{
1029 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1030 el->el_prev = GFS2_EA2NEXT(el->el_prev);
feaa7bba 1031 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
b3b94faa
DT		 1032 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1033 }
1034
1035 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1036}
1037
1038int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1039{
1040 struct gfs2_ea_location el;
1041 int error;
1042
1043 if (!ip->i_di.di_eattr) {
1044 if (er->er_flags & XATTR_REPLACE)
1045 return -ENODATA;
1046 return ea_init(ip, er);
1047 }
1048
1049 error = gfs2_ea_find(ip, er, &el);
1050 if (error)
1051 return error;
1052
1053 if (el.el_ea) {
1054 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1055 brelse(el.el_bh);
1056 return -EPERM;
1057 }
1058
1059 error = -EEXIST;
1060 if (!(er->er_flags & XATTR_CREATE)) {
1061 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1062 error = ea_set_i(ip, er, &el);
1063 if (!error && unstuffed)
1064 ea_set_remove_unstuffed(ip, &el);
1065 }
1066
1067 brelse(el.el_bh);
1068 } else {
1069 error = -ENODATA;
1070 if (!(er->er_flags & XATTR_REPLACE))
1071 error = ea_set_i(ip, er, NULL);
1072 }
1073
1074 return error;
1075}
1076
1077int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1078{
1079 struct gfs2_holder i_gh;
1080 int error;
1081
cca195c5 1082 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
b3b94faa
DT		 1083 return -EINVAL;
1084 if (!er->er_data || !er->er_data_len) {
1085 er->er_data = NULL;
1086 er->er_data_len = 0;
1087 }
feaa7bba 1088 error = ea_check_size(GFS2_SB(&ip->i_inode), er);
b3b94faa
DT		 1089 if (error)
1090 return error;
1091
1092 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1093 if (error)
1094 return error;
1095
feaa7bba 1096 if (IS_IMMUTABLE(&ip->i_inode))
b3b94faa
DT		 1097 error = -EPERM;
1098 else
1099 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1100
1101 gfs2_glock_dq_uninit(&i_gh);
1102
1103 return error;
1104}
1105
1106static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1107{
1108 struct gfs2_ea_header *ea = el->el_ea;
1109 struct gfs2_ea_header *prev = el->el_prev;
1110 struct buffer_head *dibh;
1111 int error;
1112
feaa7bba 1113 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
b3b94faa
DT		 1114 if (error)
1115 return error;
1116
d4e9c4c3 1117 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
b3b94faa
DT		 1118
1119 if (prev) {
cd915493 1120 u32 len;
b3b94faa
DT		 1121
1122 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1123 prev->ea_rec_len = cpu_to_be32(len);
1124
1125 if (GFS2_EA_IS_LAST(ea))
1126 prev->ea_flags |= GFS2_EAFLAG_LAST;
1127 } else
1128 ea->ea_type = GFS2_EATYPE_UNUSED;
1129
1130 error = gfs2_meta_inode_buffer(ip, &dibh);
1131 if (!error) {
1132 ip->i_di.di_ctime = get_seconds();
d4e9c4c3 1133 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1134 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1135 brelse(dibh);
907b9bce 1136 }
b3b94faa 1137
feaa7bba 1138 gfs2_trans_end(GFS2_SB(&ip->i_inode));
b3b94faa
DT		 1139
1140 return error;
1141}
1142
1143int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1144{
1145 struct gfs2_ea_location el;
1146 int error;
1147
1148 if (!ip->i_di.di_eattr)
1149 return -ENODATA;
1150
1151 error = gfs2_ea_find(ip, er, &el);
1152 if (error)
1153 return error;
1154 if (!el.el_ea)
1155 return -ENODATA;
1156
1157 if (GFS2_EA_IS_STUFFED(el.el_ea))
1158 error = ea_remove_stuffed(ip, &el);
1159 else
1160 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1161 0);
1162
1163 brelse(el.el_bh);
1164
1165 return error;
1166}
1167
1168/**
1169 * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1170 * @ip: pointer to the inode of the target file
1171 * @er: request information
1172 *
1173 * Returns: errno
1174 */
1175
1176int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1177{
1178 struct gfs2_holder i_gh;
1179 int error;
1180
1181 if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1182 return -EINVAL;
1183
1184 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1185 if (error)
1186 return error;
1187
feaa7bba 1188 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
b3b94faa
DT		 1189 error = -EPERM;
1190 else
1191 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1192
1193 gfs2_glock_dq_uninit(&i_gh);
1194
1195 return error;
1196}
1197
1198static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1199 struct gfs2_ea_header *ea, char *data)
1200{
feaa7bba 1201 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 1202 struct buffer_head **bh;
1203 unsigned int amount = GFS2_EA_DATA_LEN(ea);
5c676f6d 1204 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
cd915493 1205 u64 *dataptrs = GFS2_EA2DATAPTRS(ea);
b3b94faa
DT		 1206 unsigned int x;
1207 int error;
1208
1209 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1210 if (!bh)
1211 return -ENOMEM;
1212
1213 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1214 if (error)
1215 goto out;
1216
1217 for (x = 0; x < nptrs; x++) {
7276b3b0
SW		 1218 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
1219 bh + x);
b3b94faa
DT		 1220 if (error) {
1221 while (x--)
1222 brelse(bh[x]);
1223 goto fail;
1224 }
1225 dataptrs++;
1226 }
1227
1228 for (x = 0; x < nptrs; x++) {
7276b3b0 1229 error = gfs2_meta_wait(sdp, bh[x]);
b3b94faa
DT		 1230 if (error) {
1231 for (; x < nptrs; x++)
1232 brelse(bh[x]);
1233 goto fail;
1234 }
1235 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1236 for (; x < nptrs; x++)
1237 brelse(bh[x]);
1238 error = -EIO;
1239 goto fail;
1240 }
1241
d4e9c4c3 1242 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
b3b94faa 1243
cca195c5 1244 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,
b3b94faa
DT		 1245 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1246
1247 amount -= sdp->sd_jbsize;
1248 data += sdp->sd_jbsize;
1249
1250 brelse(bh[x]);
1251 }
1252
a91ea69f 1253out:
b3b94faa 1254 kfree(bh);
b3b94faa
DT		 1255 return error;
1256
a91ea69f 1257fail:
b3b94faa
DT		 1258 gfs2_trans_end(sdp);
1259 kfree(bh);
b3b94faa
DT		 1260 return error;
1261}
1262
1263int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1264 struct iattr *attr, char *data)
1265{
1266 struct buffer_head *dibh;
1267 int error;
1268
1269 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
feaa7bba 1270 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
b3b94faa
DT		 1271 if (error)
1272 return error;
1273
d4e9c4c3 1274 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
cca195c5 1275 memcpy(GFS2_EA2DATA(el->el_ea), data,
b3b94faa
DT		 1276 GFS2_EA_DATA_LEN(el->el_ea));
1277 } else
1278 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1279
1280 if (error)
1281 return error;
1282
1283 error = gfs2_meta_inode_buffer(ip, &dibh);
1284 if (!error) {
feaa7bba
SW		 1285 error = inode_setattr(&ip->i_inode, attr);
1286 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
b3b94faa 1287 gfs2_inode_attr_out(ip);
d4e9c4c3 1288 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1289 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1290 brelse(dibh);
1291 }
1292
feaa7bba 1293 gfs2_trans_end(GFS2_SB(&ip->i_inode));
b3b94faa
DT		 1294
1295 return error;
1296}
1297
1298static int ea_dealloc_indirect(struct gfs2_inode *ip)
1299{
feaa7bba 1300 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 1301 struct gfs2_rgrp_list rlist;
1302 struct buffer_head *indbh, *dibh;
cd915493 1303 u64 *eablk, *end;
b3b94faa 1304 unsigned int rg_blocks = 0;
cd915493 1305 u64 bstart = 0;
b3b94faa
DT		 1306 unsigned int blen = 0;
1307 unsigned int blks = 0;
1308 unsigned int x;
1309 int error;
1310
1311 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1312
7276b3b0 1313 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr, DIO_WAIT, &indbh);
b3b94faa
DT		 1314 if (error)
1315 return error;
1316
1317 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1318 error = -EIO;
1319 goto out;
1320 }
1321
cd915493 1322 eablk = (u64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
b3b94faa
DT		 1323 end = eablk + sdp->sd_inptrs;
1324
1325 for (; eablk < end; eablk++) {
cd915493 1326 u64 bn;
b3b94faa
DT		 1327
1328 if (!*eablk)
1329 break;
1330 bn = be64_to_cpu(*eablk);
1331
1332 if (bstart + blen == bn)
1333 blen++;
1334 else {
1335 if (bstart)
1336 gfs2_rlist_add(sdp, &rlist, bstart);
1337 bstart = bn;
1338 blen = 1;
1339 }
1340 blks++;
1341 }
1342 if (bstart)
1343 gfs2_rlist_add(sdp, &rlist, bstart);
1344 else
1345 goto out;
1346
1347 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1348
1349 for (x = 0; x < rlist.rl_rgrps; x++) {
1350 struct gfs2_rgrpd *rgd;
5c676f6d 1351 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
b3b94faa
DT		 1352 rg_blocks += rgd->rd_ri.ri_length;
1353 }
1354
1355 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1356 if (error)
1357 goto out_rlist_free;
1358
cca195c5
SW		 1359 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1360 RES_STATFS + RES_QUOTA, blks);
b3b94faa
DT		 1361 if (error)
1362 goto out_gunlock;
1363
d4e9c4c3 1364 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
b3b94faa 1365
cd915493 1366 eablk = (u64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
b3b94faa
DT		 1367 bstart = 0;
1368 blen = 0;
1369
1370 for (; eablk < end; eablk++) {
cd915493 1371 u64 bn;
b3b94faa
DT		 1372
1373 if (!*eablk)
1374 break;
1375 bn = be64_to_cpu(*eablk);
1376
1377 if (bstart + blen == bn)
1378 blen++;
1379 else {
1380 if (bstart)
1381 gfs2_free_meta(ip, bstart, blen);
1382 bstart = bn;
1383 blen = 1;
1384 }
1385
1386 *eablk = 0;
1387 if (!ip->i_di.di_blocks)
1388 gfs2_consist_inode(ip);
1389 ip->i_di.di_blocks--;
1390 }
1391 if (bstart)
1392 gfs2_free_meta(ip, bstart, blen);
1393
1394 ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1395
1396 error = gfs2_meta_inode_buffer(ip, &dibh);
1397 if (!error) {
d4e9c4c3 1398 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1399 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1400 brelse(dibh);
1401 }
1402
1403 gfs2_trans_end(sdp);
1404
a91ea69f 1405out_gunlock:
b3b94faa 1406 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
a91ea69f 1407out_rlist_free:
b3b94faa 1408 gfs2_rlist_free(&rlist);
a91ea69f 1409out:
b3b94faa 1410 brelse(indbh);
b3b94faa
DT		 1411 return error;
1412}
1413
1414static int ea_dealloc_block(struct gfs2_inode *ip)
1415{
feaa7bba 1416 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
b3b94faa
DT		 1417 struct gfs2_alloc *al = &ip->i_alloc;
1418 struct gfs2_rgrpd *rgd;
1419 struct buffer_head *dibh;
1420 int error;
1421
1422 rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1423 if (!rgd) {
1424 gfs2_consist_inode(ip);
1425 return -EIO;
1426 }
1427
1428 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1429 &al->al_rgd_gh);
1430 if (error)
1431 return error;
1432
cca195c5
SW		 1433 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1434 RES_QUOTA, 1);
b3b94faa
DT		 1435 if (error)
1436 goto out_gunlock;
1437
1438 gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1439
1440 ip->i_di.di_eattr = 0;
1441 if (!ip->i_di.di_blocks)
1442 gfs2_consist_inode(ip);
1443 ip->i_di.di_blocks--;
1444
1445 error = gfs2_meta_inode_buffer(ip, &dibh);
1446 if (!error) {
d4e9c4c3 1447 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
b3b94faa
DT		 1448 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1449 brelse(dibh);
1450 }
1451
1452 gfs2_trans_end(sdp);
1453
a91ea69f 1454out_gunlock:
b3b94faa 1455 gfs2_glock_dq_uninit(&al->al_rgd_gh);
b3b94faa
DT		 1456 return error;
1457}
1458
1459/**
1460 * gfs2_ea_dealloc - deallocate the extended attribute fork
1461 * @ip: the inode
1462 *
1463 * Returns: errno
1464 */
1465
1466int gfs2_ea_dealloc(struct gfs2_inode *ip)
1467{
1468 struct gfs2_alloc *al;
1469 int error;
1470
1471 al = gfs2_alloc_get(ip);
1472
1473 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1474 if (error)
1475 goto out_alloc;
1476
feaa7bba 1477 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
b3b94faa
DT		 1478 if (error)
1479 goto out_quota;
1480
1481 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1482 if (error)
1483 goto out_rindex;
1484
1485 if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1486 error = ea_dealloc_indirect(ip);
1487 if (error)
1488 goto out_rindex;
1489 }
1490
1491 error = ea_dealloc_block(ip);
1492
a91ea69f 1493out_rindex:
b3b94faa 1494 gfs2_glock_dq_uninit(&al->al_ri_gh);
a91ea69f 1495out_quota:
b3b94faa 1496 gfs2_quota_unhold(ip);
a91ea69f 1497out_alloc:
b3b94faa 1498 gfs2_alloc_put(ip);
b3b94faa
DT		 1499 return error;
1500}
1501
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