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-rw-r--r--fs/gfs2/xattr.c1558
1 files changed, 1558 insertions, 0 deletions
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
new file mode 100644
index 000000000000..34ae9ba4c9fe
--- /dev/null
+++ b/fs/gfs2/xattr.c
@@ -0,0 +1,1558 @@
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
189int 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 = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
336 if (error)
337 goto out_quota;
338
339 error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
340
341 gfs2_glock_dq_uninit(&al->al_ri_gh);
342
343out_quota:
344 gfs2_quota_unhold(ip);
345out_alloc:
346 gfs2_alloc_put(ip);
347 return error;
348}
349
350struct ea_list {
351 struct gfs2_ea_request *ei_er;
352 unsigned int ei_size;
353};
354
355static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
356{
357 switch (ea->ea_type) {
358 case GFS2_EATYPE_USR:
359 return 5 + ea->ea_name_len + 1;
360 case GFS2_EATYPE_SYS:
361 return 7 + ea->ea_name_len + 1;
362 case GFS2_EATYPE_SECURITY:
363 return 9 + ea->ea_name_len + 1;
364 default:
365 return 0;
366 }
367}
368
369static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
370 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
371 void *private)
372{
373 struct ea_list *ei = private;
374 struct gfs2_ea_request *er = ei->ei_er;
375 unsigned int ea_size = gfs2_ea_strlen(ea);
376
377 if (ea->ea_type == GFS2_EATYPE_UNUSED)
378 return 0;
379
380 if (er->er_data_len) {
381 char *prefix = NULL;
382 unsigned int l = 0;
383 char c = 0;
384
385 if (ei->ei_size + ea_size > er->er_data_len)
386 return -ERANGE;
387
388 switch (ea->ea_type) {
389 case GFS2_EATYPE_USR:
390 prefix = "user.";
391 l = 5;
392 break;
393 case GFS2_EATYPE_SYS:
394 prefix = "system.";
395 l = 7;
396 break;
397 case GFS2_EATYPE_SECURITY:
398 prefix = "security.";
399 l = 9;
400 break;
401 }
402
403 BUG_ON(l == 0);
404
405 memcpy(er->er_data + ei->ei_size, prefix, l);
406 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
407 ea->ea_name_len);
408 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
409 }
410
411 ei->ei_size += ea_size;
412
413 return 0;
414}
415
416/**
417 * gfs2_listxattr - List gfs2 extended attributes
418 * @dentry: The dentry whose inode we are interested in
419 * @buffer: The buffer to write the results
420 * @size: The size of the buffer
421 *
422 * Returns: actual size of data on success, -errno on error
423 */
424
425ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
426{
427 struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
428 struct gfs2_ea_request er;
429 struct gfs2_holder i_gh;
430 int error;
431
432 memset(&er, 0, sizeof(struct gfs2_ea_request));
433 if (size) {
434 er.er_data = buffer;
435 er.er_data_len = size;
436 }
437
438 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
439 if (error)
440 return error;
441
442 if (ip->i_eattr) {
443 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
444
445 error = ea_foreach(ip, ea_list_i, &ei);
446 if (!error)
447 error = ei.ei_size;
448 }
449
450 gfs2_glock_dq_uninit(&i_gh);
451
452 return error;
453}
454
455/**
456 * ea_get_unstuffed - actually copies the unstuffed data into the
457 * request buffer
458 * @ip: The GFS2 inode
459 * @ea: The extended attribute header structure
460 * @data: The data to be copied
461 *
462 * Returns: errno
463 */
464
465static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
466 char *data)
467{
468 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
469 struct buffer_head **bh;
470 unsigned int amount = GFS2_EA_DATA_LEN(ea);
471 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
472 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
473 unsigned int x;
474 int error = 0;
475
476 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
477 if (!bh)
478 return -ENOMEM;
479
480 for (x = 0; x < nptrs; x++) {
481 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
482 bh + x);
483 if (error) {
484 while (x--)
485 brelse(bh[x]);
486 goto out;
487 }
488 dataptrs++;
489 }
490
491 for (x = 0; x < nptrs; x++) {
492 error = gfs2_meta_wait(sdp, bh[x]);
493 if (error) {
494 for (; x < nptrs; x++)
495 brelse(bh[x]);
496 goto out;
497 }
498 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
499 for (; x < nptrs; x++)
500 brelse(bh[x]);
501 error = -EIO;
502 goto out;
503 }
504
505 memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
506 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
507
508 amount -= sdp->sd_jbsize;
509 data += sdp->sd_jbsize;
510
511 brelse(bh[x]);
512 }
513
514out:
515 kfree(bh);
516 return error;
517}
518
519int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
520 char *data, size_t size)
521{
522 int ret;
523 size_t len = GFS2_EA_DATA_LEN(el->el_ea);
524 if (len > size)
525 return -ERANGE;
526
527 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
528 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
529 return len;
530 }
531 ret = ea_get_unstuffed(ip, el->el_ea, data);
532 if (ret < 0)
533 return ret;
534 return len;
535}
536
537/**
538 * gfs2_xattr_get - Get a GFS2 extended attribute
539 * @inode: The inode
540 * @type: The type of extended attribute
541 * @name: The name of the extended attribute
542 * @buffer: The buffer to write the result into
543 * @size: The size of the buffer
544 *
545 * Returns: actual size of data on success, -errno on error
546 */
547
548int gfs2_xattr_get(struct inode *inode, int type, const char *name,
549 void *buffer, size_t size)
550{
551 struct gfs2_inode *ip = GFS2_I(inode);
552 struct gfs2_ea_location el;
553 int error;
554
555 if (!ip->i_eattr)
556 return -ENODATA;
557 if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
558 return -EINVAL;
559
560 error = gfs2_ea_find(ip, type, name, &el);
561 if (error)
562 return error;
563 if (!el.el_ea)
564 return -ENODATA;
565 if (size)
566 error = gfs2_ea_get_copy(ip, &el, buffer, size);
567 else
568 error = GFS2_EA_DATA_LEN(el.el_ea);
569 brelse(el.el_bh);
570
571 return error;
572}
573
574/**
575 * ea_alloc_blk - allocates a new block for extended attributes.
576 * @ip: A pointer to the inode that's getting extended attributes
577 * @bhp: Pointer to pointer to a struct buffer_head
578 *
579 * Returns: errno
580 */
581
582static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
583{
584 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
585 struct gfs2_ea_header *ea;
586 unsigned int n = 1;
587 u64 block;
588 int error;
589
590 error = gfs2_alloc_block(ip, &block, &n);
591 if (error)
592 return error;
593 gfs2_trans_add_unrevoke(sdp, block, 1);
594 *bhp = gfs2_meta_new(ip->i_gl, block);
595 gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
596 gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
597 gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
598
599 ea = GFS2_EA_BH2FIRST(*bhp);
600 ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
601 ea->ea_type = GFS2_EATYPE_UNUSED;
602 ea->ea_flags = GFS2_EAFLAG_LAST;
603 ea->ea_num_ptrs = 0;
604
605 gfs2_add_inode_blocks(&ip->i_inode, 1);
606
607 return 0;
608}
609
610/**
611 * ea_write - writes the request info to an ea, creating new blocks if
612 * necessary
613 * @ip: inode that is being modified
614 * @ea: the location of the new ea in a block
615 * @er: the write request
616 *
617 * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
618 *
619 * returns : errno
620 */
621
622static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
623 struct gfs2_ea_request *er)
624{
625 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
626 int error;
627
628 ea->ea_data_len = cpu_to_be32(er->er_data_len);
629 ea->ea_name_len = er->er_name_len;
630 ea->ea_type = er->er_type;
631 ea->__pad = 0;
632
633 memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
634
635 if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
636 ea->ea_num_ptrs = 0;
637 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
638 } else {
639 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
640 const char *data = er->er_data;
641 unsigned int data_len = er->er_data_len;
642 unsigned int copy;
643 unsigned int x;
644
645 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
646 for (x = 0; x < ea->ea_num_ptrs; x++) {
647 struct buffer_head *bh;
648 u64 block;
649 int mh_size = sizeof(struct gfs2_meta_header);
650 unsigned int n = 1;
651
652 error = gfs2_alloc_block(ip, &block, &n);
653 if (error)
654 return error;
655 gfs2_trans_add_unrevoke(sdp, block, 1);
656 bh = gfs2_meta_new(ip->i_gl, block);
657 gfs2_trans_add_bh(ip->i_gl, bh, 1);
658 gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
659
660 gfs2_add_inode_blocks(&ip->i_inode, 1);
661
662 copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
663 data_len;
664 memcpy(bh->b_data + mh_size, data, copy);
665 if (copy < sdp->sd_jbsize)
666 memset(bh->b_data + mh_size + copy, 0,
667 sdp->sd_jbsize - copy);
668
669 *dataptr++ = cpu_to_be64(bh->b_blocknr);
670 data += copy;
671 data_len -= copy;
672
673 brelse(bh);
674 }
675
676 gfs2_assert_withdraw(sdp, !data_len);
677 }
678
679 return 0;
680}
681
682typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
683 struct gfs2_ea_request *er, void *private);
684
685static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
686 unsigned int blks,
687 ea_skeleton_call_t skeleton_call, void *private)
688{
689 struct gfs2_alloc *al;
690 struct buffer_head *dibh;
691 int error;
692
693 al = gfs2_alloc_get(ip);
694 if (!al)
695 return -ENOMEM;
696
697 error = gfs2_quota_lock_check(ip);
698 if (error)
699 goto out;
700
701 al->al_requested = blks;
702
703 error = gfs2_inplace_reserve(ip);
704 if (error)
705 goto out_gunlock_q;
706
707 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
708 blks + al->al_rgd->rd_length +
709 RES_DINODE + RES_STATFS + RES_QUOTA, 0);
710 if (error)
711 goto out_ipres;
712
713 error = skeleton_call(ip, er, private);
714 if (error)
715 goto out_end_trans;
716
717 error = gfs2_meta_inode_buffer(ip, &dibh);
718 if (!error) {
719 ip->i_inode.i_ctime = CURRENT_TIME;
720 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
721 gfs2_dinode_out(ip, dibh->b_data);
722 brelse(dibh);
723 }
724
725out_end_trans:
726 gfs2_trans_end(GFS2_SB(&ip->i_inode));
727out_ipres:
728 gfs2_inplace_release(ip);
729out_gunlock_q:
730 gfs2_quota_unlock(ip);
731out:
732 gfs2_alloc_put(ip);
733 return error;
734}
735
736static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
737 void *private)
738{
739 struct buffer_head *bh;
740 int error;
741
742 error = ea_alloc_blk(ip, &bh);
743 if (error)
744 return error;
745
746 ip->i_eattr = bh->b_blocknr;
747 error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
748
749 brelse(bh);
750
751 return error;
752}
753
754/**
755 * ea_init - initializes a new eattr block
756 * @ip:
757 * @er:
758 *
759 * Returns: errno
760 */
761
762static int ea_init(struct gfs2_inode *ip, int type, const char *name,
763 const void *data, size_t size)
764{
765 struct gfs2_ea_request er;
766 unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
767 unsigned int blks = 1;
768
769 er.er_type = type;
770 er.er_name = name;
771 er.er_name_len = strlen(name);
772 er.er_data = (void *)data;
773 er.er_data_len = size;
774
775 if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
776 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
777
778 return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
779}
780
781static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
782{
783 u32 ea_size = GFS2_EA_SIZE(ea);
784 struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
785 ea_size);
786 u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
787 int last = ea->ea_flags & GFS2_EAFLAG_LAST;
788
789 ea->ea_rec_len = cpu_to_be32(ea_size);
790 ea->ea_flags ^= last;
791
792 new->ea_rec_len = cpu_to_be32(new_size);
793 new->ea_flags = last;
794
795 return new;
796}
797
798static void ea_set_remove_stuffed(struct gfs2_inode *ip,
799 struct gfs2_ea_location *el)
800{
801 struct gfs2_ea_header *ea = el->el_ea;
802 struct gfs2_ea_header *prev = el->el_prev;
803 u32 len;
804
805 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
806
807 if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
808 ea->ea_type = GFS2_EATYPE_UNUSED;
809 return;
810 } else if (GFS2_EA2NEXT(prev) != ea) {
811 prev = GFS2_EA2NEXT(prev);
812 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
813 }
814
815 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
816 prev->ea_rec_len = cpu_to_be32(len);
817
818 if (GFS2_EA_IS_LAST(ea))
819 prev->ea_flags |= GFS2_EAFLAG_LAST;
820}
821
822struct ea_set {
823 int ea_split;
824
825 struct gfs2_ea_request *es_er;
826 struct gfs2_ea_location *es_el;
827
828 struct buffer_head *es_bh;
829 struct gfs2_ea_header *es_ea;
830};
831
832static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
833 struct gfs2_ea_header *ea, struct ea_set *es)
834{
835 struct gfs2_ea_request *er = es->es_er;
836 struct buffer_head *dibh;
837 int error;
838
839 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
840 if (error)
841 return error;
842
843 gfs2_trans_add_bh(ip->i_gl, bh, 1);
844
845 if (es->ea_split)
846 ea = ea_split_ea(ea);
847
848 ea_write(ip, ea, er);
849
850 if (es->es_el)
851 ea_set_remove_stuffed(ip, es->es_el);
852
853 error = gfs2_meta_inode_buffer(ip, &dibh);
854 if (error)
855 goto out;
856 ip->i_inode.i_ctime = CURRENT_TIME;
857 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
858 gfs2_dinode_out(ip, dibh->b_data);
859 brelse(dibh);
860out:
861 gfs2_trans_end(GFS2_SB(&ip->i_inode));
862 return error;
863}
864
865static int ea_set_simple_alloc(struct gfs2_inode *ip,
866 struct gfs2_ea_request *er, void *private)
867{
868 struct ea_set *es = private;
869 struct gfs2_ea_header *ea = es->es_ea;
870 int error;
871
872 gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
873
874 if (es->ea_split)
875 ea = ea_split_ea(ea);
876
877 error = ea_write(ip, ea, er);
878 if (error)
879 return error;
880
881 if (es->es_el)
882 ea_set_remove_stuffed(ip, es->es_el);
883
884 return 0;
885}
886
887static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
888 struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
889 void *private)
890{
891 struct ea_set *es = private;
892 unsigned int size;
893 int stuffed;
894 int error;
895
896 stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
897 es->es_er->er_data_len, &size);
898
899 if (ea->ea_type == GFS2_EATYPE_UNUSED) {
900 if (GFS2_EA_REC_LEN(ea) < size)
901 return 0;
902 if (!GFS2_EA_IS_STUFFED(ea)) {
903 error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
904 if (error)
905 return error;
906 }
907 es->ea_split = 0;
908 } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
909 es->ea_split = 1;
910 else
911 return 0;
912
913 if (stuffed) {
914 error = ea_set_simple_noalloc(ip, bh, ea, es);
915 if (error)
916 return error;
917 } else {
918 unsigned int blks;
919
920 es->es_bh = bh;
921 es->es_ea = ea;
922 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
923 GFS2_SB(&ip->i_inode)->sd_jbsize);
924
925 error = ea_alloc_skeleton(ip, es->es_er, blks,
926 ea_set_simple_alloc, es);
927 if (error)
928 return error;
929 }
930
931 return 1;
932}
933
934static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
935 void *private)
936{
937 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
938 struct buffer_head *indbh, *newbh;
939 __be64 *eablk;
940 int error;
941 int mh_size = sizeof(struct gfs2_meta_header);
942
943 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
944 __be64 *end;
945
946 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT,
947 &indbh);
948 if (error)
949 return error;
950
951 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
952 error = -EIO;
953 goto out;
954 }
955
956 eablk = (__be64 *)(indbh->b_data + mh_size);
957 end = eablk + sdp->sd_inptrs;
958
959 for (; eablk < end; eablk++)
960 if (!*eablk)
961 break;
962
963 if (eablk == end) {
964 error = -ENOSPC;
965 goto out;
966 }
967
968 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
969 } else {
970 u64 blk;
971 unsigned int n = 1;
972 error = gfs2_alloc_block(ip, &blk, &n);
973 if (error)
974 return error;
975 gfs2_trans_add_unrevoke(sdp, blk, 1);
976 indbh = gfs2_meta_new(ip->i_gl, blk);
977 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
978 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
979 gfs2_buffer_clear_tail(indbh, mh_size);
980
981 eablk = (__be64 *)(indbh->b_data + mh_size);
982 *eablk = cpu_to_be64(ip->i_eattr);
983 ip->i_eattr = blk;
984 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
985 gfs2_add_inode_blocks(&ip->i_inode, 1);
986
987 eablk++;
988 }
989
990 error = ea_alloc_blk(ip, &newbh);
991 if (error)
992 goto out;
993
994 *eablk = cpu_to_be64((u64)newbh->b_blocknr);
995 error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
996 brelse(newbh);
997 if (error)
998 goto out;
999
1000 if (private)
1001 ea_set_remove_stuffed(ip, private);
1002
1003out:
1004 brelse(indbh);
1005 return error;
1006}
1007
1008static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1009 const void *value, size_t size, struct gfs2_ea_location *el)
1010{
1011 struct gfs2_ea_request er;
1012 struct ea_set es;
1013 unsigned int blks = 2;
1014 int error;
1015
1016 er.er_type = type;
1017 er.er_name = name;
1018 er.er_data = (void *)value;
1019 er.er_name_len = strlen(name);
1020 er.er_data_len = size;
1021
1022 memset(&es, 0, sizeof(struct ea_set));
1023 es.es_er = &er;
1024 es.es_el = el;
1025
1026 error = ea_foreach(ip, ea_set_simple, &es);
1027 if (error > 0)
1028 return 0;
1029 if (error)
1030 return error;
1031
1032 if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
1033 blks++;
1034 if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1035 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
1036
1037 return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
1038}
1039
1040static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1041 struct gfs2_ea_location *el)
1042{
1043 if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1044 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1045 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
1046 GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1047 }
1048
1049 return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1050}
1051
1052static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1053{
1054 struct gfs2_ea_header *ea = el->el_ea;
1055 struct gfs2_ea_header *prev = el->el_prev;
1056 struct buffer_head *dibh;
1057 int error;
1058
1059 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1060 if (error)
1061 return error;
1062
1063 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1064
1065 if (prev) {
1066 u32 len;
1067
1068 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1069 prev->ea_rec_len = cpu_to_be32(len);
1070
1071 if (GFS2_EA_IS_LAST(ea))
1072 prev->ea_flags |= GFS2_EAFLAG_LAST;
1073 } else {
1074 ea->ea_type = GFS2_EATYPE_UNUSED;
1075 }
1076
1077 error = gfs2_meta_inode_buffer(ip, &dibh);
1078 if (!error) {
1079 ip->i_inode.i_ctime = CURRENT_TIME;
1080 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1081 gfs2_dinode_out(ip, dibh->b_data);
1082 brelse(dibh);
1083 }
1084
1085 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1086
1087 return error;
1088}
1089
1090/**
1091 * gfs2_xattr_remove - Remove a GFS2 extended attribute
1092 * @inode: The inode
1093 * @type: The type of the extended attribute
1094 * @name: The name of the extended attribute
1095 *
1096 * This is not called directly by the VFS since we use the (common)
1097 * scheme of making a "set with NULL data" mean a remove request. Note
1098 * that this is different from a set with zero length data.
1099 *
1100 * Returns: 0, or errno on failure
1101 */
1102
1103static int gfs2_xattr_remove(struct inode *inode, int type, const char *name)
1104{
1105 struct gfs2_inode *ip = GFS2_I(inode);
1106 struct gfs2_ea_location el;
1107 int error;
1108
1109 if (!ip->i_eattr)
1110 return -ENODATA;
1111
1112 error = gfs2_ea_find(ip, type, name, &el);
1113 if (error)
1114 return error;
1115 if (!el.el_ea)
1116 return -ENODATA;
1117
1118 if (GFS2_EA_IS_STUFFED(el.el_ea))
1119 error = ea_remove_stuffed(ip, &el);
1120 else
1121 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
1122
1123 brelse(el.el_bh);
1124
1125 return error;
1126}
1127
1128/**
1129 * gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1130 * @inode: The inode
1131 * @type: The type of the extended attribute
1132 * @name: The name of the extended attribute
1133 * @value: The value of the extended attribute (NULL for remove)
1134 * @size: The size of the @value argument
1135 * @flags: Create or Replace
1136 *
1137 * See gfs2_xattr_remove() for details of the removal of xattrs.
1138 *
1139 * Returns: 0 or errno on failure
1140 */
1141
1142int gfs2_xattr_set(struct inode *inode, int type, const char *name,
1143 const void *value, size_t size, int flags)
1144{
1145 struct gfs2_sbd *sdp = GFS2_SB(inode);
1146 struct gfs2_inode *ip = GFS2_I(inode);
1147 struct gfs2_ea_location el;
1148 unsigned int namel = strlen(name);
1149 int error;
1150
1151 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1152 return -EPERM;
1153 if (namel > GFS2_EA_MAX_NAME_LEN)
1154 return -ERANGE;
1155
1156 if (value == NULL)
1157 return gfs2_xattr_remove(inode, type, name);
1158
1159 if (ea_check_size(sdp, namel, size))
1160 return -ERANGE;
1161
1162 if (!ip->i_eattr) {
1163 if (flags & XATTR_REPLACE)
1164 return -ENODATA;
1165 return ea_init(ip, type, name, value, size);
1166 }
1167
1168 error = gfs2_ea_find(ip, type, name, &el);
1169 if (error)
1170 return error;
1171
1172 if (el.el_ea) {
1173 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1174 brelse(el.el_bh);
1175 return -EPERM;
1176 }
1177
1178 error = -EEXIST;
1179 if (!(flags & XATTR_CREATE)) {
1180 int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1181 error = ea_set_i(ip, type, name, value, size, &el);
1182 if (!error && unstuffed)
1183 ea_set_remove_unstuffed(ip, &el);
1184 }
1185
1186 brelse(el.el_bh);
1187 return error;
1188 }
1189
1190 error = -ENODATA;
1191 if (!(flags & XATTR_REPLACE))
1192 error = ea_set_i(ip, type, name, value, size, NULL);
1193
1194 return error;
1195}
1196
1197static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1198 struct gfs2_ea_header *ea, char *data)
1199{
1200 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1201 struct buffer_head **bh;
1202 unsigned int amount = GFS2_EA_DATA_LEN(ea);
1203 unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1204 __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
1205 unsigned int x;
1206 int error;
1207
1208 bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
1209 if (!bh)
1210 return -ENOMEM;
1211
1212 error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1213 if (error)
1214 goto out;
1215
1216 for (x = 0; x < nptrs; x++) {
1217 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
1218 bh + x);
1219 if (error) {
1220 while (x--)
1221 brelse(bh[x]);
1222 goto fail;
1223 }
1224 dataptrs++;
1225 }
1226
1227 for (x = 0; x < nptrs; x++) {
1228 error = gfs2_meta_wait(sdp, bh[x]);
1229 if (error) {
1230 for (; x < nptrs; x++)
1231 brelse(bh[x]);
1232 goto fail;
1233 }
1234 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1235 for (; x < nptrs; x++)
1236 brelse(bh[x]);
1237 error = -EIO;
1238 goto fail;
1239 }
1240
1241 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1242
1243 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,
1244 (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1245
1246 amount -= sdp->sd_jbsize;
1247 data += sdp->sd_jbsize;
1248
1249 brelse(bh[x]);
1250 }
1251
1252out:
1253 kfree(bh);
1254 return error;
1255
1256fail:
1257 gfs2_trans_end(sdp);
1258 kfree(bh);
1259 return error;
1260}
1261
1262int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1263 struct iattr *attr, char *data)
1264{
1265 struct buffer_head *dibh;
1266 int error;
1267
1268 if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1269 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1270 if (error)
1271 return error;
1272
1273 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1274 memcpy(GFS2_EA2DATA(el->el_ea), data,
1275 GFS2_EA_DATA_LEN(el->el_ea));
1276 } else
1277 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1278
1279 if (error)
1280 return error;
1281
1282 error = gfs2_meta_inode_buffer(ip, &dibh);
1283 if (!error) {
1284 error = inode_setattr(&ip->i_inode, attr);
1285 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
1286 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1287 gfs2_dinode_out(ip, dibh->b_data);
1288 brelse(dibh);
1289 }
1290
1291 gfs2_trans_end(GFS2_SB(&ip->i_inode));
1292
1293 return error;
1294}
1295
1296static int ea_dealloc_indirect(struct gfs2_inode *ip)
1297{
1298 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1299 struct gfs2_rgrp_list rlist;
1300 struct buffer_head *indbh, *dibh;
1301 __be64 *eablk, *end;
1302 unsigned int rg_blocks = 0;
1303 u64 bstart = 0;
1304 unsigned int blen = 0;
1305 unsigned int blks = 0;
1306 unsigned int x;
1307 int error;
1308
1309 memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1310
1311 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);
1312 if (error)
1313 return error;
1314
1315 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1316 error = -EIO;
1317 goto out;
1318 }
1319
1320 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1321 end = eablk + sdp->sd_inptrs;
1322
1323 for (; eablk < end; eablk++) {
1324 u64 bn;
1325
1326 if (!*eablk)
1327 break;
1328 bn = be64_to_cpu(*eablk);
1329
1330 if (bstart + blen == bn)
1331 blen++;
1332 else {
1333 if (bstart)
1334 gfs2_rlist_add(sdp, &rlist, bstart);
1335 bstart = bn;
1336 blen = 1;
1337 }
1338 blks++;
1339 }
1340 if (bstart)
1341 gfs2_rlist_add(sdp, &rlist, bstart);
1342 else
1343 goto out;
1344
1345 gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
1346
1347 for (x = 0; x < rlist.rl_rgrps; x++) {
1348 struct gfs2_rgrpd *rgd;
1349 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1350 rg_blocks += rgd->rd_length;
1351 }
1352
1353 error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1354 if (error)
1355 goto out_rlist_free;
1356
1357 error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1358 RES_STATFS + RES_QUOTA, blks);
1359 if (error)
1360 goto out_gunlock;
1361
1362 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1363
1364 eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1365 bstart = 0;
1366 blen = 0;
1367
1368 for (; eablk < end; eablk++) {
1369 u64 bn;
1370
1371 if (!*eablk)
1372 break;
1373 bn = be64_to_cpu(*eablk);
1374
1375 if (bstart + blen == bn)
1376 blen++;
1377 else {
1378 if (bstart)
1379 gfs2_free_meta(ip, bstart, blen);
1380 bstart = bn;
1381 blen = 1;
1382 }
1383
1384 *eablk = 0;
1385 gfs2_add_inode_blocks(&ip->i_inode, -1);
1386 }
1387 if (bstart)
1388 gfs2_free_meta(ip, bstart, blen);
1389
1390 ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
1391
1392 error = gfs2_meta_inode_buffer(ip, &dibh);
1393 if (!error) {
1394 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1395 gfs2_dinode_out(ip, dibh->b_data);
1396 brelse(dibh);
1397 }
1398
1399 gfs2_trans_end(sdp);
1400
1401out_gunlock:
1402 gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1403out_rlist_free:
1404 gfs2_rlist_free(&rlist);
1405out:
1406 brelse(indbh);
1407 return error;
1408}
1409
1410static int ea_dealloc_block(struct gfs2_inode *ip)
1411{
1412 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1413 struct gfs2_alloc *al = ip->i_alloc;
1414 struct gfs2_rgrpd *rgd;
1415 struct buffer_head *dibh;
1416 int error;
1417
1418 rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr);
1419 if (!rgd) {
1420 gfs2_consist_inode(ip);
1421 return -EIO;
1422 }
1423
1424 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1425 &al->al_rgd_gh);
1426 if (error)
1427 return error;
1428
1429 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1430 RES_QUOTA, 1);
1431 if (error)
1432 goto out_gunlock;
1433
1434 gfs2_free_meta(ip, ip->i_eattr, 1);
1435
1436 ip->i_eattr = 0;
1437 gfs2_add_inode_blocks(&ip->i_inode, -1);
1438
1439 error = gfs2_meta_inode_buffer(ip, &dibh);
1440 if (!error) {
1441 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1442 gfs2_dinode_out(ip, dibh->b_data);
1443 brelse(dibh);
1444 }
1445
1446 gfs2_trans_end(sdp);
1447
1448out_gunlock:
1449 gfs2_glock_dq_uninit(&al->al_rgd_gh);
1450 return error;
1451}
1452
1453/**
1454 * gfs2_ea_dealloc - deallocate the extended attribute fork
1455 * @ip: the inode
1456 *
1457 * Returns: errno
1458 */
1459
1460int gfs2_ea_dealloc(struct gfs2_inode *ip)
1461{
1462 struct gfs2_alloc *al;
1463 int error;
1464
1465 al = gfs2_alloc_get(ip);
1466 if (!al)
1467 return -ENOMEM;
1468
1469 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1470 if (error)
1471 goto out_alloc;
1472
1473 error = gfs2_rindex_hold(GFS2_SB(&ip->i_inode), &al->al_ri_gh);
1474 if (error)
1475 goto out_quota;
1476
1477 error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1478 if (error)
1479 goto out_rindex;
1480
1481 if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
1482 error = ea_dealloc_indirect(ip);
1483 if (error)
1484 goto out_rindex;
1485 }
1486
1487 error = ea_dealloc_block(ip);
1488
1489out_rindex:
1490 gfs2_glock_dq_uninit(&al->al_ri_gh);
1491out_quota:
1492 gfs2_quota_unhold(ip);
1493out_alloc:
1494 gfs2_alloc_put(ip);
1495 return error;
1496}
1497
1498static int gfs2_xattr_user_get(struct inode *inode, const char *name,
1499 void *buffer, size_t size)
1500{
1501 return gfs2_xattr_get(inode, GFS2_EATYPE_USR, name, buffer, size);
1502}
1503
1504static int gfs2_xattr_user_set(struct inode *inode, const char *name,
1505 const void *value, size_t size, int flags)
1506{
1507 return gfs2_xattr_set(inode, GFS2_EATYPE_USR, name, value, size, flags);
1508}
1509
1510static int gfs2_xattr_system_get(struct inode *inode, const char *name,
1511 void *buffer, size_t size)
1512{
1513 return gfs2_xattr_get(inode, GFS2_EATYPE_SYS, name, buffer, size);
1514}
1515
1516static int gfs2_xattr_system_set(struct inode *inode, const char *name,
1517 const void *value, size_t size, int flags)
1518{
1519 return gfs2_xattr_set(inode, GFS2_EATYPE_SYS, name, value, size, flags);
1520}
1521
1522static int gfs2_xattr_security_get(struct inode *inode, const char *name,
1523 void *buffer, size_t size)
1524{
1525 return gfs2_xattr_get(inode, GFS2_EATYPE_SECURITY, name, buffer, size);
1526}
1527
1528static int gfs2_xattr_security_set(struct inode *inode, const char *name,
1529 const void *value, size_t size, int flags)
1530{
1531 return gfs2_xattr_set(inode, GFS2_EATYPE_SECURITY, name, value, size, flags);
1532}
1533
1534static struct xattr_handler gfs2_xattr_user_handler = {
1535 .prefix = XATTR_USER_PREFIX,
1536 .get = gfs2_xattr_user_get,
1537 .set = gfs2_xattr_user_set,
1538};
1539
1540static struct xattr_handler gfs2_xattr_security_handler = {
1541 .prefix = XATTR_SECURITY_PREFIX,
1542 .get = gfs2_xattr_security_get,
1543 .set = gfs2_xattr_security_set,
1544};
1545
1546static struct xattr_handler gfs2_xattr_system_handler = {
1547 .prefix = XATTR_SYSTEM_PREFIX,
1548 .get = gfs2_xattr_system_get,
1549 .set = gfs2_xattr_system_set,
1550};
1551
1552struct xattr_handler *gfs2_xattr_handlers[] = {
1553 &gfs2_xattr_user_handler,
1554 &gfs2_xattr_security_handler,
1555 &gfs2_xattr_system_handler,
1556 NULL,
1557};
1558
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-23 10:10:14 -0500