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1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 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 version 2.
8 */
9
10#include <linux/slab.h>
11#include <linux/spinlock.h>
12#include <linux/completion.h>
13#include <linux/buffer_head.h>
14#include <linux/xattr.h>
15#include <linux/gfs2_ondisk.h>
16#include <asm/uaccess.h>
17
18#include "gfs2.h"
19#include "incore.h"
20#include "acl.h"
21#include "xattr.h"
22#include "glock.h"
23#include "inode.h"
24#include "meta_io.h"
25#include "quota.h"
26#include "rgrp.h"
27#include "trans.h"
28#include "util.h"
29
30/**
31 * ea_calc_size - returns the acutal number of bytes the request will take up
32 * (not counting any unstuffed data blocks)
33 * @sdp:
34 * @er:
35 * @size:
36 *
37 * Returns: 1 if the EA should be stuffed
38 */
39
40static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,
41 unsigned int *size)
42{
43 unsigned int jbsize = sdp->sd_jbsize;
44
45 /* Stuffed */
46 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
47
48 if (*size <= jbsize)
49 return 1;
50
51 /* Unstuffed */
52 *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
53 (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);
54
55 return 0;
56}
57
58static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)
59{
60 unsigned int size;
61
62 if (dsize > GFS2_EA_MAX_DATA_LEN)
63 return -ERANGE;
64
65 ea_calc_size(sdp, nsize, dsize, &size);
66
67 /* This can only happen with 512 byte blocks */
68 if (size > sdp->sd_jbsize)
69 return -ERANGE;
70
71 return 0;
72}
73
74typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
75 struct gfs2_ea_header *ea,
76 struct gfs2_ea_header *prev, 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(GFS2_SB(&ip->i_inode), 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 && (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
110fail:
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 __be64 *eablk, *end;
119 int error;
120
121 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh);
122 if (error)
123 return error;
124
125 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
126 error = ea_foreach_i(ip, bh, ea_call, data);
127 goto out;
128 }
129
130 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
131 error = -EIO;
132 goto out;
133 }
134
135 eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
136 end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
137
138 for (; eablk < end; eablk++) {
139 u64 bn;
140
141 if (!*eablk)
142 break;
143 bn = be64_to_cpu(*eablk);
144
145 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh);
146 if (error)
147 break;
148 error = ea_foreach_i(ip, eabh, ea_call, data);
149 brelse(eabh);
150 if (error)
151 break;
152 }
153out:
154 brelse(bh);
155 return error;
156}
157
158struct ea_find {
159 int type;
160 const char *name;
161 size_t namel;
162 struct gfs2_ea_location *ef_el;
163};
164
165static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
166 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
167 void *private)
168{
169 struct ea_find *ef = private;
170
171 if (ea->ea_type == GFS2_EATYPE_UNUSED)
172 return 0;
173
174 if (ea->ea_type == ef->type) {
175 if (ea->ea_name_len == ef->namel &&
176 !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {
177 struct gfs2_ea_location *el = ef->ef_el;
178 get_bh(bh);
179 el->el_bh = bh;
180 el->el_ea = ea;
181 el->el_prev = prev;
182 return 1;
183 }
184 }
185
186 return 0;
187}
188
189static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
190 struct gfs2_ea_location *el)
191{
192 struct ea_find ef;
193 int error;
194
195 ef.type = type;
196 ef.name = name;
197 ef.namel = strlen(name);
198 ef.ef_el = el;
199
200 memset(el, 0, sizeof(struct gfs2_ea_location));
201
202 error = ea_foreach(ip, ea_find_i, &ef);
203 if (error > 0)
204 return 0;
205
206 return error;
207}
208
209/**
210 * ea_dealloc_unstuffed -
211 * @ip:
212 * @bh:
213 * @ea:
214 * @prev:
215 * @private:
216 *
217 * Take advantage of the fact that all unstuffed blocks are
218 * allocated from the same RG. But watch, this may not always
219 * be true.
220 *
221 * Returns: errno
222 */
223
224static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
225 struct gfs2_ea_header *ea,
226 struct gfs2_ea_header *prev, void *private)
227{
228 int *leave = private;
229 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
230 struct gfs2_rgrpd *rgd;
231 struct gfs2_holder rg_gh;
232 struct buffer_head *dibh;
233 __be64 *dataptrs;
234 u64 bn = 0;
235 u64 bstart = 0;
236 unsigned int blen = 0;
237 unsigned int blks = 0;
238 unsigned int x;
239 int error;
240
241 if (GFS2_EA_IS_STUFFED(ea))
242 return 0;
243
244 dataptrs = GFS2_EA2DATAPTRS(ea);
245 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
246 if (*dataptrs) {
247 blks++;
248 bn = be64_to_cpu(*dataptrs);
249 }
250 }
251 if (!blks)
252 return 0;
253
254 rgd = gfs2_blk2rgrpd(sdp, bn);
255 if (!rgd) {
256 gfs2_consist_inode(ip);
257 return -EIO;
258 }
259
260 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
261 if (error)
262 return error;
263
264 error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
265 RES_EATTR + RES_STATFS + RES_QUOTA, blks);
266 if (error)
267 goto out_gunlock;
268
269 gfs2_trans_add_bh(ip->i_gl, bh, 1);
270
271 dataptrs = GFS2_EA2DATAPTRS(ea);
272 for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
273 if (!*dataptrs)
274 break;
275 bn = be64_to_cpu(*dataptrs);
276
277 if (bstart + blen == bn)
278 blen++;
279 else {
280 if (bstart)
281 gfs2_free_meta(ip, bstart, blen);
282 bstart = bn;
283 blen = 1;
284 }
285
286 *dataptrs = 0;
287 gfs2_add_inode_blocks(&ip->i_inode, -1);
288 }
289 if (bstart)
290 gfs2_free_meta(ip, bstart, blen);
291
292 if (prev && !leave) {
293 u32 len;
294
295 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
296 prev->ea_rec_len = cpu_to_be32(len);
297
298 if (GFS2_EA_IS_LAST(ea))
299 prev->ea_flags |= GFS2_EAFLAG_LAST;
300 } else {
301 ea->ea_type = GFS2_EATYPE_UNUSED;
302 ea->ea_num_ptrs = 0;
303 }
304
305 error = gfs2_meta_inode_buffer(ip, &dibh);
306 if (!error) {
307 ip->i_inode.i_ctime = CURRENT_TIME;
308 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
309 gfs2_dinode_out(ip, dibh->b_data);
310 brelse(dibh);
311 }
312
313 gfs2_trans_end(sdp);
314
315out_gunlock:
316 gfs2_glock_dq_uninit(&rg_gh);
317 return error;
318}
319
320static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
321 struct gfs2_ea_header *ea,
322 struct gfs2_ea_header *prev, int leave)
323{
324 struct gfs2_alloc *al;
325 int error;
326
327 al = gfs2_alloc_get(ip);
328 if (!al)
329 return -ENOMEM;
330
331 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
332 if (error)
333 goto out_alloc;
334
335 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
336
337 gfs2_quota_unhold(ip);
338out_alloc:
339 gfs2_alloc_put(ip);
340 return error;
341}
342
343struct ea_list {
344 struct gfs2_ea_request *ei_er;
345 unsigned int ei_size;
346};
347
348static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
349{
350 switch (ea->ea_type) {
351 case GFS2_EATYPE_USR:
352 return 5 + ea->ea_name_len + 1;
353 case GFS2_EATYPE_SYS:
354 return 7 + ea->ea_name_len + 1;
355 case GFS2_EATYPE_SECURITY:
356 return 9 + ea->ea_name_len + 1;
357 default:
358 return 0;
359 }
360}
361
362static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
363 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
364 void *private)
365{
366 struct ea_list *ei = private;
367 struct gfs2_ea_request *er = ei->ei_er;
368 unsigned int ea_size = gfs2_ea_strlen(ea);
369
370 if (ea->ea_type == GFS2_EATYPE_UNUSED)
371 return 0;
372
373 if (er->er_data_len) {
374 char *prefix = NULL;
375 unsigned int l = 0;
376 char c = 0;
377
378 if (ei->ei_size + ea_size > er->er_data_len)
379 return -ERANGE;
380
381 switch (ea->ea_type) {
382 case GFS2_EATYPE_USR:
383 prefix = "user.";
384 l = 5;
385 break;
386 case GFS2_EATYPE_SYS:
387 prefix = "system.";
388 l = 7;
389 break;
390 case GFS2_EATYPE_SECURITY:
391 prefix = "security.";
392 l = 9;
393 break;
394 }
395
396 BUG_ON(l == 0);
397
398 memcpy(er->er_data + ei->ei_size, prefix, l);
399 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
400 ea->ea_name_len);
401 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
402 }
403
404 ei->ei_size += ea_size;
405
406 return 0;
407}
408
409/**
410 * gfs2_listxattr - List gfs2 extended attributes
411 * @dentry: The dentry whose inode we are interested in
412 * @buffer: The buffer to write the results
413 * @size: The size of the buffer
414 *
415 * Returns: actual size of data on success, -errno on error
416 */
417
418ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
419{
420 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
421 struct gfs2_ea_request er;
422 struct gfs2_holder i_gh;
423 int error;
424
425 memset(&er, 0, sizeof(struct gfs2_ea_request));
426 if (size) {
427 er.er_data = buffer;
428 er.er_data_len = size;
429 }
430
431 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
432 if (error)
433 return error;
434
435 if (ip->i_eattr) {
436 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
437
438 error = ea_foreach(ip, ea_list_i, &ei);
439 if (!error)
440 error = ei.ei_size;
441 }
442
443 gfs2_glock_dq_uninit(&i_gh);
444
445 return error;
446}
447
448/**
449 * ea_get_unstuffed - actually copies the unstuffed data into the
450 * request buffer
451 * @ip: The GFS2 inode
452 * @ea: The extended attribute header structure
453 * @data: The data to be copied
454 *
455 * Returns: errno
456 */
457
458static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
459 char *data)
460{
461 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
462 struct buffer_head **bh;
463 unsigned int amount = GFS2_EA_DATA_LEN(ea);
464 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
465 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
466 unsigned int x;
467 int error = 0;
468
469 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
470 if (!bh)
471 return -ENOMEM;
472
473 for (x = 0; x < nptrs; x++) {
474 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
475 bh + x);
476 if (error) {
477 while (x--)
478 brelse(bh[x]);
479 goto out;
480 }
481 dataptrs++;
482 }
483
484 for (x = 0; x < nptrs; x++) {
485 error = gfs2_meta_wait(sdp, bh[x]);
486 if (error) {
487 for (; x < nptrs; x++)
488 brelse(bh[x]);
489 goto out;
490 }
491 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
492 for (; x < nptrs; x++)
493 brelse(bh[x]);
494 error = -EIO;
495 goto out;
496 }
497
498 memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
499 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
500
501 amount -= sdp->sd_jbsize;
502 data += sdp->sd_jbsize;
503
504 brelse(bh[x]);
505 }
506
507out:
508 kfree(bh);
509 return error;
510}
511
512static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
513 char *data, size_t size)
514{
515 int ret;
516 size_t len = GFS2_EA_DATA_LEN(el->el_ea);
517 if (len > size)
518 return -ERANGE;
519
520 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
521 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
522 return len;
523 }
524 ret = ea_get_unstuffed(ip, el->el_ea, data);
525 if (ret < 0)
526 return ret;
527 return len;
528}
529
530int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
531{
532 struct gfs2_ea_location el;
533 int error;
534 int len;
535 char *data;
536
537 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
538 if (error)
539 return error;
540 if (!el.el_ea)
541 goto out;
542 if (!GFS2_EA_DATA_LEN(el.el_ea))
543 goto out;
544
545 len = GFS2_EA_DATA_LEN(el.el_ea);
546 data = kmalloc(len, GFP_NOFS);
547 error = -ENOMEM;
548 if (data == NULL)
549 goto out;
550
551 error = gfs2_ea_get_copy(ip, &el, data, len);
552 if (error < 0)
553 kfree(data);
554 else
555 *ppdata = data;
556out:
557 brelse(el.el_bh);
558 return error;
559}
560
561/**
562 * gfs2_xattr_get - Get a GFS2 extended attribute
563 * @inode: The inode
564 * @name: The name of the extended attribute
565 * @buffer: The buffer to write the result into
566 * @size: The size of the buffer
567 * @type: The type of extended attribute
568 *
569 * Returns: actual size of data on success, -errno on error
570 */
571static int gfs2_xattr_get(struct dentry *dentry, const char *name,
572 void *buffer, size_t size, int type)
573{
574 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
575 struct gfs2_ea_location el;
576 int error;
577
578 if (!ip->i_eattr)
579 return -ENODATA;
580 if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
581 return -EINVAL;
582
583 error = gfs2_ea_find(ip, type, name, &el);
584 if (error)
585 return error;
586 if (!el.el_ea)
587 return -ENODATA;
588 if (size)
589 error = gfs2_ea_get_copy(ip, &el, buffer, size);
590 else
591 error = GFS2_EA_DATA_LEN(el.el_ea);
592 brelse(el.el_bh);
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: Pointer to pointer to a struct buffer_head
601 *
602 * Returns: errno
603 */
604
605static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
606{
607 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
608 struct gfs2_ea_header *ea;
609 unsigned int n = 1;
610 u64 block;
611 int error;
612
613 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
614 if (error)
615 return error;
616 gfs2_trans_add_unrevoke(sdp, block, 1);
617 *bhp = gfs2_meta_new(ip->i_gl, block);
618 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
619 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
620 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
621
622 ea = GFS2_EA_BH2FIRST(*bhp);
623 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
624 ea->ea_type = GFS2_EATYPE_UNUSED;
625 ea->ea_flags = GFS2_EAFLAG_LAST;
626 ea->ea_num_ptrs = 0;
627
628 gfs2_add_inode_blocks(&ip->i_inode, 1);
629
630 return 0;
631}
632
633/**
634 * ea_write - writes the request info to an ea, creating new blocks if
635 * necessary
636 * @ip: inode that is being modified
637 * @ea: the location of the new ea in a block
638 * @er: the write request
639 *
640 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
641 *
642 * returns : errno
643 */
644
645static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
646 struct gfs2_ea_request *er)
647{
648 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
649 int error;
650
651 ea->ea_data_len = cpu_to_be32(er->er_data_len);
652 ea->ea_name_len = er->er_name_len;
653 ea->ea_type = er->er_type;
654 ea->__pad = 0;
655
656 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
657
658 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
659 ea->ea_num_ptrs = 0;
660 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
661 } else {
662 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
663 const char *data = er->er_data;
664 unsigned int data_len = er->er_data_len;
665 unsigned int copy;
666 unsigned int x;
667
668 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
669 for (x = 0; x < ea->ea_num_ptrs; x++) {
670 struct buffer_head *bh;
671 u64 block;
672 int mh_size = sizeof(struct gfs2_meta_header);
673 unsigned int n = 1;
674
675 error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
676 if (error)
677 return error;
678 gfs2_trans_add_unrevoke(sdp, block, 1);
679 bh = gfs2_meta_new(ip->i_gl, block);
680 gfs2_trans_add_bh(ip->i_gl, bh, 1);
681 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
682
683 gfs2_add_inode_blocks(&ip->i_inode, 1);
684
685 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
686 data_len;
687 memcpy(bh->b_data + mh_size, data, copy);
688 if (copy < sdp->sd_jbsize)
689 memset(bh->b_data + mh_size + copy, 0,
690 sdp->sd_jbsize - copy);
691
692 *dataptr++ = cpu_to_be64(bh->b_blocknr);
693 data += copy;
694 data_len -= copy;
695
696 brelse(bh);
697 }
698
699 gfs2_assert_withdraw(sdp, !data_len);
700 }
701
702 return 0;
703}
704
705typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
706 struct gfs2_ea_request *er, void *private);
707
708static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
709 unsigned int blks,
710 ea_skeleton_call_t skeleton_call, void *private)
711{
712 struct gfs2_alloc *al;
713 struct buffer_head *dibh;
714 int error;
715
716 al = gfs2_alloc_get(ip);
717 if (!al)
718 return -ENOMEM;
719
720 error = gfs2_quota_lock_check(ip);
721 if (error)
722 goto out;
723
724 al->al_requested = blks;
725
726 error = gfs2_inplace_reserve(ip);
727 if (error)
728 goto out_gunlock_q;
729
730 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
731 blks + gfs2_rg_blocks(ip) +
732 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
733 if (error)
734 goto out_ipres;
735
736 error = skeleton_call(ip, er, private);
737 if (error)
738 goto out_end_trans;
739
740 error = gfs2_meta_inode_buffer(ip, &dibh);
741 if (!error) {
742 ip->i_inode.i_ctime = CURRENT_TIME;
743 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
744 gfs2_dinode_out(ip, dibh->b_data);
745 brelse(dibh);
746 }
747
748out_end_trans:
749 gfs2_trans_end(GFS2_SB(&ip->i_inode));
750out_ipres:
751 gfs2_inplace_release(ip);
752out_gunlock_q:
753 gfs2_quota_unlock(ip);
754out:
755 gfs2_alloc_put(ip);
756 return error;
757}
758
759static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
760 void *private)
761{
762 struct buffer_head *bh;
763 int error;
764
765 error = ea_alloc_blk(ip, &bh);
766 if (error)
767 return error;
768
769 ip->i_eattr = bh->b_blocknr;
770 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
771
772 brelse(bh);
773
774 return error;
775}
776
777/**
778 * ea_init - initializes a new eattr block
779 * @ip:
780 * @er:
781 *
782 * Returns: errno
783 */
784
785static int ea_init(struct gfs2_inode *ip, int type, const char *name,
786 const void *data, size_t size)
787{
788 struct gfs2_ea_request er;
789 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
790 unsigned int blks = 1;
791
792 er.er_type = type;
793 er.er_name = name;
794 er.er_name_len = strlen(name);
795 er.er_data = (void *)data;
796 er.er_data_len = size;
797
798 if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
799 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
800
801 return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
802}
803
804static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
805{
806 u32 ea_size = GFS2_EA_SIZE(ea);
807 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
808 ea_size);
809 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
810 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
811
812 ea->ea_rec_len = cpu_to_be32(ea_size);
813 ea->ea_flags ^= last;
814
815 new->ea_rec_len = cpu_to_be32(new_size);
816 new->ea_flags = last;
817
818 return new;
819}
820
821static void ea_set_remove_stuffed(struct gfs2_inode *ip,
822 struct gfs2_ea_location *el)
823{
824 struct gfs2_ea_header *ea = el->el_ea;
825 struct gfs2_ea_header *prev = el->el_prev;
826 u32 len;
827
828 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
829
830 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
831 ea->ea_type = GFS2_EATYPE_UNUSED;
832 return;
833 } else if (GFS2_EA2NEXT(prev) != ea) {
834 prev = GFS2_EA2NEXT(prev);
835 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
836 }
837
838 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
839 prev->ea_rec_len = cpu_to_be32(len);
840
841 if (GFS2_EA_IS_LAST(ea))
842 prev->ea_flags |= GFS2_EAFLAG_LAST;
843}
844
845struct ea_set {
846 int ea_split;
847
848 struct gfs2_ea_request *es_er;
849 struct gfs2_ea_location *es_el;
850
851 struct buffer_head *es_bh;
852 struct gfs2_ea_header *es_ea;
853};
854
855static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
856 struct gfs2_ea_header *ea, struct ea_set *es)
857{
858 struct gfs2_ea_request *er = es->es_er;
859 struct buffer_head *dibh;
860 int error;
861
862 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
863 if (error)
864 return error;
865
866 gfs2_trans_add_bh(ip->i_gl, bh, 1);
867
868 if (es->ea_split)
869 ea = ea_split_ea(ea);
870
871 ea_write(ip, ea, er);
872
873 if (es->es_el)
874 ea_set_remove_stuffed(ip, es->es_el);
875
876 error = gfs2_meta_inode_buffer(ip, &dibh);
877 if (error)
878 goto out;
879 ip->i_inode.i_ctime = CURRENT_TIME;
880 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
881 gfs2_dinode_out(ip, dibh->b_data);
882 brelse(dibh);
883out:
884 gfs2_trans_end(GFS2_SB(&ip->i_inode));
885 return error;
886}
887
888static int ea_set_simple_alloc(struct gfs2_inode *ip,
889 struct gfs2_ea_request *er, void *private)
890{
891 struct ea_set *es = private;
892 struct gfs2_ea_header *ea = es->es_ea;
893 int error;
894
895 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
896
897 if (es->ea_split)
898 ea = ea_split_ea(ea);
899
900 error = ea_write(ip, ea, er);
901 if (error)
902 return error;
903
904 if (es->es_el)
905 ea_set_remove_stuffed(ip, es->es_el);
906
907 return 0;
908}
909
910static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
911 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
912 void *private)
913{
914 struct ea_set *es = private;
915 unsigned int size;
916 int stuffed;
917 int error;
918
919 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
920 es->es_er->er_data_len, &size);
921
922 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
923 if (GFS2_EA_REC_LEN(ea) < size)
924 return 0;
925 if (!GFS2_EA_IS_STUFFED(ea)) {
926 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
927 if (error)
928 return error;
929 }
930 es->ea_split = 0;
931 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
932 es->ea_split = 1;
933 else
934 return 0;
935
936 if (stuffed) {
937 error = ea_set_simple_noalloc(ip, bh, ea, es);
938 if (error)
939 return error;
940 } else {
941 unsigned int blks;
942
943 es->es_bh = bh;
944 es->es_ea = ea;
945 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
946 GFS2_SB(&ip->i_inode)->sd_jbsize);
947
948 error = ea_alloc_skeleton(ip, es->es_er, blks,
949 ea_set_simple_alloc, es);
950 if (error)
951 return error;
952 }
953
954 return 1;
955}
956
957static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
958 void *private)
959{
960 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
961 struct buffer_head *indbh, *newbh;
962 __be64 *eablk;
963 int error;
964 int mh_size = sizeof(struct gfs2_meta_header);
965
966 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
967 __be64 *end;
968
969 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT,
970 &indbh);
971 if (error)
972 return error;
973
974 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
975 error = -EIO;
976 goto out;
977 }
978
979 eablk = (__be64 *)(indbh->b_data + mh_size);
980 end = eablk + sdp->sd_inptrs;
981
982 for (; eablk < end; eablk++)
983 if (!*eablk)
984 break;
985
986 if (eablk == end) {
987 error = -ENOSPC;
988 goto out;
989 }
990
991 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
992 } else {
993 u64 blk;
994 unsigned int n = 1;
995 error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
996 if (error)
997 return error;
998 gfs2_trans_add_unrevoke(sdp, blk, 1);
999 indbh = gfs2_meta_new(ip->i_gl, blk);
1000 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1001 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1002 gfs2_buffer_clear_tail(indbh, mh_size);
1003
1004 eablk = (__be64 *)(indbh->b_data + mh_size);
1005 *eablk = cpu_to_be64(ip->i_eattr);
1006 ip->i_eattr = blk;
1007 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
1008 gfs2_add_inode_blocks(&ip->i_inode, 1);
1009
1010 eablk++;
1011 }
1012
1013 error = ea_alloc_blk(ip, &newbh);
1014 if (error)
1015 goto out;
1016
1017 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
1018 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1019 brelse(newbh);
1020 if (error)
1021 goto out;
1022
1023 if (private)
1024 ea_set_remove_stuffed(ip, private);
1025
1026out:
1027 brelse(indbh);
1028 return error;
1029}
1030
1031static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1032 const void *value, size_t size, struct gfs2_ea_location *el)
1033{
1034 struct gfs2_ea_request er;
1035 struct ea_set es;
1036 unsigned int blks = 2;
1037 int error;
1038
1039 er.er_type = type;
1040 er.er_name = name;
1041 er.er_data = (void *)value;
1042 er.er_name_len = strlen(name);
1043 er.er_data_len = size;
1044
1045 memset(&es, 0, sizeof(struct ea_set));
1046 es.es_er = &er;
1047 es.es_el = el;
1048
1049 error = ea_foreach(ip, ea_set_simple, &es);
1050 if (error > 0)
1051 return 0;
1052 if (error)
1053 return error;
1054
1055 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
1056 blks++;
1057 if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1058 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
1059
1060 return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
1061}
1062
1063static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1064 struct gfs2_ea_location *el)
1065{
1066 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1067 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1068 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
1069 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1070 }
1071
1072 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
1073}
1074
1075static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1076{
1077 struct gfs2_ea_header *ea = el->el_ea;
1078 struct gfs2_ea_header *prev = el->el_prev;
1079 struct buffer_head *dibh;
1080 int error;
1081
1082 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1083 if (error)
1084 return error;
1085
1086 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1087
1088 if (prev) {
1089 u32 len;
1090
1091 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1092 prev->ea_rec_len = cpu_to_be32(len);
1093
1094 if (GFS2_EA_IS_LAST(ea))
1095 prev->ea_flags |= GFS2_EAFLAG_LAST;
1096 } else {
1097 ea->ea_type = GFS2_EATYPE_UNUSED;
1098 }
1099
1100 error = gfs2_meta_inode_buffer(ip, &dibh);
1101 if (!error) {
1102 ip->i_inode.i_ctime = CURRENT_TIME;
1103 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1104 gfs2_dinode_out(ip, dibh->b_data);
1105 brelse(dibh);
1106 }
1107
1108 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1109
1110 return error;
1111}
1112
1113/**
1114 * gfs2_xattr_remove - Remove a GFS2 extended attribute
1115 * @ip: The inode
1116 * @type: The type of the extended attribute
1117 * @name: The name of the extended attribute
1118 *
1119 * This is not called directly by the VFS since we use the (common)
1120 * scheme of making a "set with NULL data" mean a remove request. Note
1121 * that this is different from a set with zero length data.
1122 *
1123 * Returns: 0, or errno on failure
1124 */
1125
1126static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
1127{
1128 struct gfs2_ea_location el;
1129 int error;
1130
1131 if (!ip->i_eattr)
1132 return -ENODATA;
1133
1134 error = gfs2_ea_find(ip, type, name, &el);
1135 if (error)
1136 return error;
1137 if (!el.el_ea)
1138 return -ENODATA;
1139
1140 if (GFS2_EA_IS_STUFFED(el.el_ea))
1141 error = ea_remove_stuffed(ip, &el);
1142 else
1143 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
1144
1145 brelse(el.el_bh);
1146
1147 return error;
1148}
1149
1150/**
1151 * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1152 * @ip: The inode
1153 * @name: The name of the extended attribute
1154 * @value: The value of the extended attribute (NULL for remove)
1155 * @size: The size of the @value argument
1156 * @flags: Create or Replace
1157 * @type: The type of the extended attribute
1158 *
1159 * See gfs2_xattr_remove() for details of the removal of xattrs.
1160 *
1161 * Returns: 0 or errno on failure
1162 */
1163
1164int __gfs2_xattr_set(struct inode *inode, const char *name,
1165 const void *value, size_t size, int flags, int type)
1166{
1167 struct gfs2_inode *ip = GFS2_I(inode);
1168 struct gfs2_sbd *sdp = GFS2_SB(inode);
1169 struct gfs2_ea_location el;
1170 unsigned int namel = strlen(name);
1171 int error;
1172
1173 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1174 return -EPERM;
1175 if (namel > GFS2_EA_MAX_NAME_LEN)
1176 return -ERANGE;
1177
1178 if (value == NULL)
1179 return gfs2_xattr_remove(ip, type, name);
1180
1181 if (ea_check_size(sdp, namel, size))
1182 return -ERANGE;
1183
1184 if (!ip->i_eattr) {
1185 if (flags & XATTR_REPLACE)
1186 return -ENODATA;
1187 return ea_init(ip, type, name, value, size);
1188 }
1189
1190 error = gfs2_ea_find(ip, type, name, &el);
1191 if (error)
1192 return error;
1193
1194 if (el.el_ea) {
1195 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1196 brelse(el.el_bh);
1197 return -EPERM;
1198 }
1199
1200 error = -EEXIST;
1201 if (!(flags & XATTR_CREATE)) {
1202 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1203 error = ea_set_i(ip, type, name, value, size, &el);
1204 if (!error && unstuffed)
1205 ea_set_remove_unstuffed(ip, &el);
1206 }
1207
1208 brelse(el.el_bh);
1209 return error;
1210 }
1211
1212 error = -ENODATA;
1213 if (!(flags & XATTR_REPLACE))
1214 error = ea_set_i(ip, type, name, value, size, NULL);
1215
1216 return error;
1217}
1218
1219static int gfs2_xattr_set(struct dentry *dentry, const char *name,
1220 const void *value, size_t size, int flags, int type)
1221{
1222 return __gfs2_xattr_set(dentry->d_inode, name, value,
1223 size, flags, type);
1224}
1225
1226static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1227 struct gfs2_ea_header *ea, char *data)
1228{
1229 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1230 struct buffer_head **bh;
1231 unsigned int amount = GFS2_EA_DATA_LEN(ea);
1232 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1233 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
1234 unsigned int x;
1235 int error;
1236
1237 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
1238 if (!bh)
1239 return -ENOMEM;
1240
1241 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1242 if (error)
1243 goto out;
1244
1245 for (x = 0; x < nptrs; x++) {
1246 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
1247 bh + x);
1248 if (error) {
1249 while (x--)
1250 brelse(bh[x]);
1251 goto fail;
1252 }
1253 dataptrs++;
1254 }
1255
1256 for (x = 0; x < nptrs; x++) {
1257 error = gfs2_meta_wait(sdp, bh[x]);
1258 if (error) {
1259 for (; x < nptrs; x++)
1260 brelse(bh[x]);
1261 goto fail;
1262 }
1263 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1264 for (; x < nptrs; x++)
1265 brelse(bh[x]);
1266 error = -EIO;
1267 goto fail;
1268 }
1269
1270 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1271
1272 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,
1273 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1274
1275 amount -= sdp->sd_jbsize;
1276 data += sdp->sd_jbsize;
1277
1278 brelse(bh[x]);
1279 }
1280
1281out:
1282 kfree(bh);
1283 return error;
1284
1285fail:
1286 gfs2_trans_end(sdp);
1287 kfree(bh);
1288 return error;
1289}
1290
1291int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
1292{
1293 struct inode *inode = &ip->i_inode;
1294 struct gfs2_sbd *sdp = GFS2_SB(inode);
1295 struct gfs2_ea_location el;
1296 int error;
1297
1298 error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
1299 if (error)
1300 return error;
1301
1302 if (GFS2_EA_IS_STUFFED(el.el_ea)) {
1303 error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0);
1304 if (error == 0) {
1305 gfs2_trans_add_bh(ip->i_gl, el.el_bh, 1);
1306 memcpy(GFS2_EA2DATA(el.el_ea), data,
1307 GFS2_EA_DATA_LEN(el.el_ea));
1308 }
1309 } else {
1310 error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);
1311 }
1312
1313 brelse(el.el_bh);
1314 if (error)
1315 return error;
1316
1317 error = gfs2_setattr_simple(inode, attr);
1318 gfs2_trans_end(sdp);
1319 return error;
1320}
1321
1322static int ea_dealloc_indirect(struct gfs2_inode *ip)
1323{
1324 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1325 struct gfs2_rgrp_list rlist;
1326 struct buffer_head *indbh, *dibh;
1327 __be64 *eablk, *end;
1328 unsigned int rg_blocks = 0;
1329 u64 bstart = 0;
1330 unsigned int blen = 0;
1331 unsigned int blks = 0;
1332 unsigned int x;
1333 int error;
1334
1335 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1336
1337 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);
1338 if (error)
1339 return error;
1340
1341 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1342 error = -EIO;
1343 goto out;
1344 }
1345
1346 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1347 end = eablk + sdp->sd_inptrs;
1348
1349 for (; eablk < end; eablk++) {
1350 u64 bn;
1351
1352 if (!*eablk)
1353 break;
1354 bn = be64_to_cpu(*eablk);
1355
1356 if (bstart + blen == bn)
1357 blen++;
1358 else {
1359 if (bstart)
1360 gfs2_rlist_add(ip, &rlist, bstart);
1361 bstart = bn;
1362 blen = 1;
1363 }
1364 blks++;
1365 }
1366 if (bstart)
1367 gfs2_rlist_add(ip, &rlist, bstart);
1368 else
1369 goto out;
1370
1371 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
1372
1373 for (x = 0; x < rlist.rl_rgrps; x++) {
1374 struct gfs2_rgrpd *rgd;
1375 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1376 rg_blocks += rgd->rd_length;
1377 }
1378
1379 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1380 if (error)
1381 goto out_rlist_free;
1382
1383 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1384 RES_STATFS + RES_QUOTA, blks);
1385 if (error)
1386 goto out_gunlock;
1387
1388 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1389
1390 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1391 bstart = 0;
1392 blen = 0;
1393
1394 for (; eablk < end; eablk++) {
1395 u64 bn;
1396
1397 if (!*eablk)
1398 break;
1399 bn = be64_to_cpu(*eablk);
1400
1401 if (bstart + blen == bn)
1402 blen++;
1403 else {
1404 if (bstart)
1405 gfs2_free_meta(ip, bstart, blen);
1406 bstart = bn;
1407 blen = 1;
1408 }
1409
1410 *eablk = 0;
1411 gfs2_add_inode_blocks(&ip->i_inode, -1);
1412 }
1413 if (bstart)
1414 gfs2_free_meta(ip, bstart, blen);
1415
1416 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
1417
1418 error = gfs2_meta_inode_buffer(ip, &dibh);
1419 if (!error) {
1420 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1421 gfs2_dinode_out(ip, dibh->b_data);
1422 brelse(dibh);
1423 }
1424
1425 gfs2_trans_end(sdp);
1426
1427out_gunlock:
1428 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1429out_rlist_free:
1430 gfs2_rlist_free(&rlist);
1431out:
1432 brelse(indbh);
1433 return error;
1434}
1435
1436static int ea_dealloc_block(struct gfs2_inode *ip)
1437{
1438 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1439 struct gfs2_alloc *al = ip->i_alloc;
1440 struct gfs2_rgrpd *rgd;
1441 struct buffer_head *dibh;
1442 int error;
1443
1444 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr);
1445 if (!rgd) {
1446 gfs2_consist_inode(ip);
1447 return -EIO;
1448 }
1449
1450 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1451 &al->al_rgd_gh);
1452 if (error)
1453 return error;
1454
1455 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1456 RES_QUOTA, 1);
1457 if (error)
1458 goto out_gunlock;
1459
1460 gfs2_free_meta(ip, ip->i_eattr, 1);
1461
1462 ip->i_eattr = 0;
1463 gfs2_add_inode_blocks(&ip->i_inode, -1);
1464
1465 error = gfs2_meta_inode_buffer(ip, &dibh);
1466 if (!error) {
1467 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1468 gfs2_dinode_out(ip, dibh->b_data);
1469 brelse(dibh);
1470 }
1471
1472 gfs2_trans_end(sdp);
1473
1474out_gunlock:
1475 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1476 return error;
1477}
1478
1479/**
1480 * gfs2_ea_dealloc - deallocate the extended attribute fork
1481 * @ip: the inode
1482 *
1483 * Returns: errno
1484 */
1485
1486int gfs2_ea_dealloc(struct gfs2_inode *ip)
1487{
1488 struct gfs2_alloc *al;
1489 int error;
1490
1491 al = gfs2_alloc_get(ip);
1492 if (!al)
1493 return -ENOMEM;
1494
1495 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1496 if (error)
1497 goto out_alloc;
1498
1499 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1500 if (error)
1501 goto out_quota;
1502
1503 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
1504 error = ea_dealloc_indirect(ip);
1505 if (error)
1506 goto out_quota;
1507 }
1508
1509 error = ea_dealloc_block(ip);
1510
1511out_quota:
1512 gfs2_quota_unhold(ip);
1513out_alloc:
1514 gfs2_alloc_put(ip);
1515 return error;
1516}
1517
1518static const struct xattr_handler gfs2_xattr_user_handler = {
1519 .prefix = XATTR_USER_PREFIX,
1520 .flags = GFS2_EATYPE_USR,
1521 .get = gfs2_xattr_get,
1522 .set = gfs2_xattr_set,
1523};
1524
1525static const struct xattr_handler gfs2_xattr_security_handler = {
1526 .prefix = XATTR_SECURITY_PREFIX,
1527 .flags = GFS2_EATYPE_SECURITY,
1528 .get = gfs2_xattr_get,
1529 .set = gfs2_xattr_set,
1530};
1531
1532const struct xattr_handler *gfs2_xattr_handlers[] = {
1533 &gfs2_xattr_user_handler,
1534 &gfs2_xattr_security_handler,
1535 &gfs2_xattr_system_handler,
1536 NULL,
1537};
1538
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