[GFS2] Remove some unused code
[linux-2.6.git] / fs / gfs2 / eattr.c
1 /*
2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3  * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
4  *
5  * This copyrighted material is made available to anyone wishing to use,
6  * modify, copy, or redistribute it subject to the terms and conditions
7  * of the GNU General Public License v.2.
8  */
9
10 #include <linux/sched.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/xattr.h>
16 #include <linux/gfs2_ondisk.h>
17 #include <asm/semaphore.h>
18 #include <asm/uaccess.h>
19
20 #include "gfs2.h"
21 #include "lm_interface.h"
22 #include "incore.h"
23 #include "acl.h"
24 #include "eaops.h"
25 #include "eattr.h"
26 #include "glock.h"
27 #include "inode.h"
28 #include "meta_io.h"
29 #include "quota.h"
30 #include "rgrp.h"
31 #include "trans.h"
32 #include "util.h"
33
34 /**
35  * ea_calc_size - returns the acutal number of bytes the request will take up
36  *                (not counting any unstuffed data blocks)
37  * @sdp:
38  * @er:
39  * @size:
40  *
41  * Returns: 1 if the EA should be stuffed
42  */
43
44 static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
45                         unsigned int *size)
46 {
47         *size = GFS2_EAREQ_SIZE_STUFFED(er);
48         if (*size <= sdp->sd_jbsize)
49                 return 1;
50
51         *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
52
53         return 0;
54 }
55
56 static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
57 {
58         unsigned int size;
59
60         if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
61                 return -ERANGE;
62
63         ea_calc_size(sdp, er, &size);
64
65         /* This can only happen with 512 byte blocks */
66         if (size > sdp->sd_jbsize)
67                 return -ERANGE;
68
69         return 0;
70 }
71
72 typedef int (*ea_call_t) (struct gfs2_inode *ip,
73                           struct buffer_head *bh,
74                           struct gfs2_ea_header *ea,
75                           struct gfs2_ea_header *prev,
76                           void *private);
77
78 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
79                         ea_call_t ea_call, void *data)
80 {
81         struct gfs2_ea_header *ea, *prev = NULL;
82         int error = 0;
83
84         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA))
85                 return -EIO;
86
87         for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
88                 if (!GFS2_EA_REC_LEN(ea))
89                         goto fail;
90                 if (!(bh->b_data <= (char *)ea &&
91                       (char *)GFS2_EA2NEXT(ea) <=
92                       bh->b_data + bh->b_size))
93                         goto fail;
94                 if (!GFS2_EATYPE_VALID(ea->ea_type))
95                         goto fail;
96
97                 error = ea_call(ip, bh, ea, prev, data);
98                 if (error)
99                         return error;
100
101                 if (GFS2_EA_IS_LAST(ea)) {
102                         if ((char *)GFS2_EA2NEXT(ea) !=
103                             bh->b_data + bh->b_size)
104                                 goto fail;
105                         break;
106                 }
107         }
108
109         return error;
110
111  fail:
112         gfs2_consist_inode(ip);
113         return -EIO;
114 }
115
116 static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
117 {
118         struct buffer_head *bh, *eabh;
119         uint64_t *eablk, *end;
120         int error;
121
122         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
123                                DIO_START | DIO_WAIT, &bh);
124         if (error)
125                 return error;
126
127         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
128                 error = ea_foreach_i(ip, bh, ea_call, data);
129                 goto out;
130         }
131
132         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
133                 error = -EIO;
134                 goto out;
135         }
136
137         eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
138         end = eablk + ip->i_sbd->sd_inptrs;
139
140         for (; eablk < end; eablk++) {
141                 uint64_t bn;
142
143                 if (!*eablk)
144                         break;
145                 bn = be64_to_cpu(*eablk);
146
147                 error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT,
148                                        &eabh);
149                 if (error)
150                         break;
151                 error = ea_foreach_i(ip, eabh, ea_call, data);
152                 brelse(eabh);
153                 if (error)
154                         break;
155         }
156  out:
157         brelse(bh);
158
159         return error;
160 }
161
162 struct ea_find {
163         struct gfs2_ea_request *ef_er;
164         struct gfs2_ea_location *ef_el;
165 };
166
167 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
168                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
169                      void *private)
170 {
171         struct ea_find *ef = private;
172         struct gfs2_ea_request *er = ef->ef_er;
173
174         if (ea->ea_type == GFS2_EATYPE_UNUSED)
175                 return 0;
176
177         if (ea->ea_type == er->er_type) {
178                 if (ea->ea_name_len == er->er_name_len &&
179                     !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
180                         struct gfs2_ea_location *el = ef->ef_el;
181                         get_bh(bh);
182                         el->el_bh = bh;
183                         el->el_ea = ea;
184                         el->el_prev = prev;
185                         return 1;
186                 }
187         }
188
189 #if 0
190         else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) &&
191                  er->er_type == GFS2_EATYPE_SYS)
192                 return 1;
193 #endif
194
195         return 0;
196 }
197
198 int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
199                  struct gfs2_ea_location *el)
200 {
201         struct ea_find ef;
202         int error;
203
204         ef.ef_er = er;
205         ef.ef_el = el;
206
207         memset(el, 0, sizeof(struct gfs2_ea_location));
208
209         error = ea_foreach(ip, ea_find_i, &ef);
210         if (error > 0)
211                 return 0;
212
213         return error;
214 }
215
216 /**
217  * ea_dealloc_unstuffed -
218  * @ip:
219  * @bh:
220  * @ea:
221  * @prev:
222  * @private:
223  *
224  * Take advantage of the fact that all unstuffed blocks are
225  * allocated from the same RG.  But watch, this may not always
226  * be true.
227  *
228  * Returns: errno
229  */
230
231 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
232                                 struct gfs2_ea_header *ea,
233                                 struct gfs2_ea_header *prev, void *private)
234 {
235         int *leave = private;
236         struct gfs2_sbd *sdp = ip->i_sbd;
237         struct gfs2_rgrpd *rgd;
238         struct gfs2_holder rg_gh;
239         struct buffer_head *dibh;
240         uint64_t *dataptrs, bn = 0;
241         uint64_t bstart = 0;
242         unsigned int blen = 0;
243         unsigned int blks = 0;
244         unsigned int x;
245         int error;
246
247         if (GFS2_EA_IS_STUFFED(ea))
248                 return 0;
249
250         dataptrs = GFS2_EA2DATAPTRS(ea);
251         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
252                 if (*dataptrs) {
253                         blks++;
254                         bn = be64_to_cpu(*dataptrs);
255                 }
256         if (!blks)
257                 return 0;
258
259         rgd = gfs2_blk2rgrpd(sdp, bn);
260         if (!rgd) {
261                 gfs2_consist_inode(ip);
262                 return -EIO;
263         }
264
265         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
266         if (error)
267                 return error;
268
269         error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length +
270                                  RES_DINODE + RES_EATTR + RES_STATFS +
271                                  RES_QUOTA, blks);
272         if (error)
273                 goto out_gunlock;
274
275         gfs2_trans_add_bh(ip->i_gl, bh, 1);
276
277         dataptrs = GFS2_EA2DATAPTRS(ea);
278         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
279                 if (!*dataptrs)
280                         break;
281                 bn = be64_to_cpu(*dataptrs);
282
283                 if (bstart + blen == bn)
284                         blen++;
285                 else {
286                         if (bstart)
287                                 gfs2_free_meta(ip, bstart, blen);
288                         bstart = bn;
289                         blen = 1;
290                 }
291
292                 *dataptrs = 0;
293                 if (!ip->i_di.di_blocks)
294                         gfs2_consist_inode(ip);
295                 ip->i_di.di_blocks--;
296         }
297         if (bstart)
298                 gfs2_free_meta(ip, bstart, blen);
299
300         if (prev && !leave) {
301                 uint32_t len;
302
303                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
304                 prev->ea_rec_len = cpu_to_be32(len);
305
306                 if (GFS2_EA_IS_LAST(ea))
307                         prev->ea_flags |= GFS2_EAFLAG_LAST;
308         } else {
309                 ea->ea_type = GFS2_EATYPE_UNUSED;
310                 ea->ea_num_ptrs = 0;
311         }
312
313         error = gfs2_meta_inode_buffer(ip, &dibh);
314         if (!error) {
315                 ip->i_di.di_ctime = get_seconds();
316                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
317                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
318                 brelse(dibh);
319         }
320
321         gfs2_trans_end(sdp);
322
323  out_gunlock:
324         gfs2_glock_dq_uninit(&rg_gh);
325
326         return error;
327 }
328
329 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
330                                struct gfs2_ea_header *ea,
331                                struct gfs2_ea_header *prev, int leave)
332 {
333         struct gfs2_alloc *al;
334         int error;
335
336         al = gfs2_alloc_get(ip);
337
338         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
339         if (error)
340                 goto out_alloc;
341
342         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
343         if (error)
344                 goto out_quota;
345
346         error = ea_dealloc_unstuffed(ip,
347                                      bh, ea, prev,
348                                      (leave) ? &error : NULL);
349
350         gfs2_glock_dq_uninit(&al->al_ri_gh);
351
352  out_quota:
353         gfs2_quota_unhold(ip);
354
355  out_alloc:
356         gfs2_alloc_put(ip);
357
358         return error;
359 }
360
361 struct ea_list {
362         struct gfs2_ea_request *ei_er;
363         unsigned int ei_size;
364 };
365
366 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
367                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
368                      void *private)
369 {
370         struct ea_list *ei = private;
371         struct gfs2_ea_request *er = ei->ei_er;
372         unsigned int ea_size = GFS2_EA_STRLEN(ea);
373
374         if (ea->ea_type == GFS2_EATYPE_UNUSED)
375                 return 0;
376
377         if (er->er_data_len) {
378                 char *prefix;
379                 unsigned int l;
380                 char c = 0;
381
382                 if (ei->ei_size + ea_size > er->er_data_len)
383                         return -ERANGE;
384
385                 if (ea->ea_type == GFS2_EATYPE_USR) {
386                         prefix = "user.";
387                         l = 5;
388                 } else {
389                         prefix = "system.";
390                         l = 7;
391                 }
392
393                 memcpy(er->er_data + ei->ei_size,
394                        prefix, l);
395                 memcpy(er->er_data + ei->ei_size + l,
396                        GFS2_EA2NAME(ea),
397                        ea->ea_name_len);
398                 memcpy(er->er_data + ei->ei_size +
399                        ea_size - 1,
400                        &c, 1);
401         }
402
403         ei->ei_size += ea_size;
404
405         return 0;
406 }
407
408 /**
409  * gfs2_ea_list -
410  * @ip:
411  * @er:
412  *
413  * Returns: actual size of data on success, -errno on error
414  */
415
416 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
417 {
418         struct gfs2_holder i_gh;
419         int error;
420
421         if (!er->er_data || !er->er_data_len) {
422                 er->er_data = NULL;
423                 er->er_data_len = 0;
424         }
425
426         error = gfs2_glock_nq_init(ip->i_gl,
427                                   LM_ST_SHARED, LM_FLAG_ANY,
428                                   &i_gh);
429         if (error)
430                 return error;
431
432         if (ip->i_di.di_eattr) {
433                 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
434
435                 error = ea_foreach(ip, ea_list_i, &ei);
436                 if (!error)
437                         error = ei.ei_size;
438         }
439
440         gfs2_glock_dq_uninit(&i_gh);
441
442         return error;
443 }
444
445 /**
446  * ea_get_unstuffed - actually copies the unstuffed data into the
447  *                    request buffer
448  * @ip:
449  * @ea:
450  * @data:
451  *
452  * Returns: errno
453  */
454
455 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
456                             char *data)
457 {
458         struct gfs2_sbd *sdp = ip->i_sbd;
459         struct buffer_head **bh;
460         unsigned int amount = GFS2_EA_DATA_LEN(ea);
461         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
462         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
463         unsigned int x;
464         int error = 0;
465
466         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
467         if (!bh)
468                 return -ENOMEM;
469
470         for (x = 0; x < nptrs; x++) {
471                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
472                                        DIO_START, bh + x);
473                 if (error) {
474                         while (x--)
475                                 brelse(bh[x]);
476                         goto out;
477                 }
478                 dataptrs++;
479         }
480
481         for (x = 0; x < nptrs; x++) {
482                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
483                 if (error) {
484                         for (; x < nptrs; x++)
485                                 brelse(bh[x]);
486                         goto out;
487                 }
488                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
489                         for (; x < nptrs; x++)
490                                 brelse(bh[x]);
491                         error = -EIO;
492                         goto out;
493                 }
494
495                 memcpy(data,
496                        bh[x]->b_data + sizeof(struct gfs2_meta_header),
497                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
498
499                 amount -= sdp->sd_jbsize;
500                 data += sdp->sd_jbsize;
501
502                 brelse(bh[x]);
503         }
504
505  out:
506         kfree(bh);
507
508         return error;
509 }
510
511 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
512                      char *data)
513 {
514         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
515                 memcpy(data,
516                        GFS2_EA2DATA(el->el_ea),
517                        GFS2_EA_DATA_LEN(el->el_ea));
518                 return 0;
519         } else
520                 return ea_get_unstuffed(ip, el->el_ea, data);
521 }
522
523 /**
524  * gfs2_ea_get_i -
525  * @ip:
526  * @er:
527  *
528  * Returns: actual size of data on success, -errno on error
529  */
530
531 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
532 {
533         struct gfs2_ea_location el;
534         int error;
535
536         if (!ip->i_di.di_eattr)
537                 return -ENODATA;
538
539         error = gfs2_ea_find(ip, er, &el);
540         if (error)
541                 return error;
542         if (!el.el_ea)
543                 return -ENODATA;
544
545         if (er->er_data_len) {
546                 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
547                         error =  -ERANGE;
548                 else
549                         error = gfs2_ea_get_copy(ip, &el, er->er_data);
550         }
551         if (!error)
552                 error = GFS2_EA_DATA_LEN(el.el_ea);
553
554         brelse(el.el_bh);
555
556         return error;
557 }
558
559 /**
560  * gfs2_ea_get -
561  * @ip:
562  * @er:
563  *
564  * Returns: actual size of data on success, -errno on error
565  */
566
567 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
568 {
569         struct gfs2_holder i_gh;
570         int error;
571
572         if (!er->er_name_len ||
573             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
574                 return -EINVAL;
575         if (!er->er_data || !er->er_data_len) {
576                 er->er_data = NULL;
577                 er->er_data_len = 0;
578         }
579
580         error = gfs2_glock_nq_init(ip->i_gl,
581                                   LM_ST_SHARED, LM_FLAG_ANY,
582                                   &i_gh);
583         if (error)
584                 return error;
585
586         error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
587
588         gfs2_glock_dq_uninit(&i_gh);
589
590         return error;
591 }
592
593 /**
594  * ea_alloc_blk - allocates a new block for extended attributes.
595  * @ip: A pointer to the inode that's getting extended attributes
596  * @bhp:
597  *
598  * Returns: errno
599  */
600
601 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
602 {
603         struct gfs2_sbd *sdp = ip->i_sbd;
604         struct gfs2_ea_header *ea;
605         uint64_t block;
606
607         block = gfs2_alloc_meta(ip);
608
609         *bhp = gfs2_meta_new(ip->i_gl, block);
610         gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
611         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
612         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
613
614         ea = GFS2_EA_BH2FIRST(*bhp);
615         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
616         ea->ea_type = GFS2_EATYPE_UNUSED;
617         ea->ea_flags = GFS2_EAFLAG_LAST;
618         ea->ea_num_ptrs = 0;
619
620         ip->i_di.di_blocks++;
621
622         return 0;
623 }
624
625 /**
626  * ea_write - writes the request info to an ea, creating new blocks if
627  *            necessary
628  * @ip:  inode that is being modified
629  * @ea:  the location of the new ea in a block
630  * @er: the write request
631  *
632  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
633  *
634  * returns : errno
635  */
636
637 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
638                     struct gfs2_ea_request *er)
639 {
640         struct gfs2_sbd *sdp = ip->i_sbd;
641
642         ea->ea_data_len = cpu_to_be32(er->er_data_len);
643         ea->ea_name_len = er->er_name_len;
644         ea->ea_type = er->er_type;
645         ea->__pad = 0;
646
647         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
648
649         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
650                 ea->ea_num_ptrs = 0;
651                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
652         } else {
653                 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
654                 const char *data = er->er_data;
655                 unsigned int data_len = er->er_data_len;
656                 unsigned int copy;
657                 unsigned int x;
658
659                 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
660                 for (x = 0; x < ea->ea_num_ptrs; x++) {
661                         struct buffer_head *bh;
662                         uint64_t block;
663                         int mh_size = sizeof(struct gfs2_meta_header);
664
665                         block = gfs2_alloc_meta(ip);
666
667                         bh = gfs2_meta_new(ip->i_gl, block);
668                         gfs2_trans_add_bh(ip->i_gl, bh, 1);
669                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
670
671                         ip->i_di.di_blocks++;
672
673                         copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
674                                                              data_len;
675                         memcpy(bh->b_data + mh_size, data, copy);
676                         if (copy < sdp->sd_jbsize)
677                                 memset(bh->b_data + mh_size + copy, 0,
678                                        sdp->sd_jbsize - copy);
679
680                         *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
681                         data += copy;
682                         data_len -= copy;
683
684                         brelse(bh);
685                 }
686
687                 gfs2_assert_withdraw(sdp, !data_len);
688         }
689
690         return 0;
691 }
692
693 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
694                                    struct gfs2_ea_request *er,
695                                    void *private);
696
697 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
698                              unsigned int blks,
699                              ea_skeleton_call_t skeleton_call,
700                              void *private)
701 {
702         struct gfs2_alloc *al;
703         struct buffer_head *dibh;
704         int error;
705
706         al = gfs2_alloc_get(ip);
707
708         error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
709         if (error)
710                 goto out;
711
712         error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
713         if (error)
714                 goto out_gunlock_q;
715
716         al->al_requested = blks;
717
718         error = gfs2_inplace_reserve(ip);
719         if (error)
720                 goto out_gunlock_q;
721
722         error = gfs2_trans_begin(ip->i_sbd,
723                                  blks + al->al_rgd->rd_ri.ri_length +
724                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
725         if (error)
726                 goto out_ipres;
727
728         error = skeleton_call(ip, er, private);
729         if (error)
730                 goto out_end_trans;
731
732         error = gfs2_meta_inode_buffer(ip, &dibh);
733         if (!error) {
734                 if (er->er_flags & GFS2_ERF_MODE) {
735                         gfs2_assert_withdraw(ip->i_sbd,
736                                             (ip->i_di.di_mode & S_IFMT) ==
737                                             (er->er_mode & S_IFMT));
738                         ip->i_di.di_mode = er->er_mode;
739                 }
740                 ip->i_di.di_ctime = get_seconds();
741                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
742                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
743                 brelse(dibh);
744         }
745
746  out_end_trans:
747         gfs2_trans_end(ip->i_sbd);
748
749  out_ipres:
750         gfs2_inplace_release(ip);
751
752  out_gunlock_q:
753         gfs2_quota_unlock(ip);
754
755  out:
756         gfs2_alloc_put(ip);
757
758         return error;
759 }
760
761 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
762                      void *private)
763 {
764         struct buffer_head *bh;
765         int error;
766
767         error = ea_alloc_blk(ip, &bh);
768         if (error)
769                 return error;
770
771         ip->i_di.di_eattr = bh->b_blocknr;
772         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
773
774         brelse(bh);
775
776         return error;
777 }
778
779 /**
780  * ea_init - initializes a new eattr block
781  * @ip:
782  * @er:
783  *
784  * Returns: errno
785  */
786
787 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
788 {
789         unsigned int jbsize = ip->i_sbd->sd_jbsize;
790         unsigned int blks = 1;
791
792         if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
793                 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
794
795         return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
796 }
797
798 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
799 {
800         uint32_t ea_size = GFS2_EA_SIZE(ea);
801         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
802                                      ea_size);
803         uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
804         int last = ea->ea_flags & GFS2_EAFLAG_LAST;
805
806         ea->ea_rec_len = cpu_to_be32(ea_size);
807         ea->ea_flags ^= last;
808
809         new->ea_rec_len = cpu_to_be32(new_size);
810         new->ea_flags = last;
811
812         return new;
813 }
814
815 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
816                                   struct gfs2_ea_location *el)
817 {
818         struct gfs2_ea_header *ea = el->el_ea;
819         struct gfs2_ea_header *prev = el->el_prev;
820         uint32_t len;
821
822         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
823
824         if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
825                 ea->ea_type = GFS2_EATYPE_UNUSED;
826                 return;
827         } else if (GFS2_EA2NEXT(prev) != ea) {
828                 prev = GFS2_EA2NEXT(prev);
829                 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
830         }
831
832         len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
833         prev->ea_rec_len = cpu_to_be32(len);
834
835         if (GFS2_EA_IS_LAST(ea))
836                 prev->ea_flags |= GFS2_EAFLAG_LAST;
837 }
838
839 struct ea_set {
840         int ea_split;
841
842         struct gfs2_ea_request *es_er;
843         struct gfs2_ea_location *es_el;
844
845         struct buffer_head *es_bh;
846         struct gfs2_ea_header *es_ea;
847 };
848
849 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
850                                  struct gfs2_ea_header *ea, struct ea_set *es)
851 {
852         struct gfs2_ea_request *er = es->es_er;
853         struct buffer_head *dibh;
854         int error;
855
856         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
857         if (error)
858                 return error;
859
860         gfs2_trans_add_bh(ip->i_gl, bh, 1);
861
862         if (es->ea_split)
863                 ea = ea_split_ea(ea);
864
865         ea_write(ip, ea, er);
866
867         if (es->es_el)
868                 ea_set_remove_stuffed(ip, es->es_el);
869
870         error = gfs2_meta_inode_buffer(ip, &dibh);
871         if (error)
872                 goto out;
873
874         if (er->er_flags & GFS2_ERF_MODE) {
875                 gfs2_assert_withdraw(ip->i_sbd,
876                         (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
877                 ip->i_di.di_mode = er->er_mode;
878         }
879         ip->i_di.di_ctime = get_seconds();
880         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
881         gfs2_dinode_out(&ip->i_di, dibh->b_data);
882         brelse(dibh);
883  out:
884         gfs2_trans_end(ip->i_sbd);
885
886         return error;
887 }
888
889 static int ea_set_simple_alloc(struct gfs2_inode *ip,
890                                struct gfs2_ea_request *er, void *private)
891 {
892         struct ea_set *es = private;
893         struct gfs2_ea_header *ea = es->es_ea;
894         int error;
895
896         gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
897
898         if (es->ea_split)
899                 ea = ea_split_ea(ea);
900
901         error = ea_write(ip, ea, er);
902         if (error)
903                 return error;
904
905         if (es->es_el)
906                 ea_set_remove_stuffed(ip, es->es_el);
907
908         return 0;
909 }
910
911 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
912                          struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
913                          void *private)
914 {
915         struct ea_set *es = private;
916         unsigned int size;
917         int stuffed;
918         int error;
919
920         stuffed = ea_calc_size(ip->i_sbd, es->es_er, &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                                         ip->i_sbd->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
957 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
958                         void *private)
959 {
960         struct gfs2_sbd *sdp = ip->i_sbd;
961         struct buffer_head *indbh, *newbh;
962         uint64_t *eablk;
963         int error;
964         int mh_size = sizeof(struct gfs2_meta_header);
965
966         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
967                 uint64_t *end;
968
969                 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
970                                        DIO_START | DIO_WAIT, &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 = (uint64_t *)(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                 uint64_t blk;
994
995                 blk = gfs2_alloc_meta(ip);
996
997                 indbh = gfs2_meta_new(ip->i_gl, blk);
998                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
999                 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1000                 gfs2_buffer_clear_tail(indbh, mh_size);
1001
1002                 eablk = (uint64_t *)(indbh->b_data + mh_size);
1003                 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1004                 ip->i_di.di_eattr = blk;
1005                 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1006                 ip->i_di.di_blocks++;
1007
1008                 eablk++;
1009         }
1010
1011         error = ea_alloc_blk(ip, &newbh);
1012         if (error)
1013                 goto out;
1014
1015         *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1016         error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1017         brelse(newbh);
1018         if (error)
1019                 goto out;
1020
1021         if (private)
1022                 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1023
1024  out:
1025         brelse(indbh);
1026
1027         return error;
1028 }
1029
1030 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1031                     struct gfs2_ea_location *el)
1032 {
1033         struct ea_set es;
1034         unsigned int blks = 2;
1035         int error;
1036
1037         memset(&es, 0, sizeof(struct ea_set));
1038         es.es_er = er;
1039         es.es_el = el;
1040
1041         error = ea_foreach(ip, ea_set_simple, &es);
1042         if (error > 0)
1043                 return 0;
1044         if (error)
1045                 return error;
1046
1047         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1048                 blks++;
1049         if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
1050                 blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize);
1051
1052         return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1053 }
1054
1055 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1056                                    struct gfs2_ea_location *el)
1057 {
1058         if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1059                 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1060                 gfs2_assert_withdraw(ip->i_sbd,
1061                                      GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1062         }
1063
1064         return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1065 }
1066
1067 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1068 {
1069         struct gfs2_ea_location el;
1070         int error;
1071
1072         if (!ip->i_di.di_eattr) {
1073                 if (er->er_flags & XATTR_REPLACE)
1074                         return -ENODATA;
1075                 return ea_init(ip, er);
1076         }
1077
1078         error = gfs2_ea_find(ip, er, &el);
1079         if (error)
1080                 return error;
1081
1082         if (el.el_ea) {
1083                 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1084                         brelse(el.el_bh);
1085                         return -EPERM;
1086                 }
1087
1088                 error = -EEXIST;
1089                 if (!(er->er_flags & XATTR_CREATE)) {
1090                         int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1091                         error = ea_set_i(ip, er, &el);
1092                         if (!error && unstuffed)
1093                                 ea_set_remove_unstuffed(ip, &el);
1094                 }
1095
1096                 brelse(el.el_bh);
1097         } else {
1098                 error = -ENODATA;
1099                 if (!(er->er_flags & XATTR_REPLACE))
1100                         error = ea_set_i(ip, er, NULL);
1101         }
1102
1103         return error;
1104 }
1105
1106 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1107 {
1108         struct gfs2_holder i_gh;
1109         int error;
1110
1111         if (!er->er_name_len ||
1112             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1113                 return -EINVAL;
1114         if (!er->er_data || !er->er_data_len) {
1115                 er->er_data = NULL;
1116                 er->er_data_len = 0;
1117         }
1118         error = ea_check_size(ip->i_sbd, er);
1119         if (error)
1120                 return error;
1121
1122         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1123         if (error)
1124                 return error;
1125
1126         if (IS_IMMUTABLE(ip->i_vnode))
1127                 error = -EPERM;
1128         else
1129                 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1130
1131         gfs2_glock_dq_uninit(&i_gh);
1132
1133         return error;
1134 }
1135
1136 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1137 {
1138         struct gfs2_ea_header *ea = el->el_ea;
1139         struct gfs2_ea_header *prev = el->el_prev;
1140         struct buffer_head *dibh;
1141         int error;
1142
1143         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1144         if (error)
1145                 return error;
1146
1147         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1148
1149         if (prev) {
1150                 uint32_t len;
1151
1152                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1153                 prev->ea_rec_len = cpu_to_be32(len);
1154
1155                 if (GFS2_EA_IS_LAST(ea))
1156                         prev->ea_flags |= GFS2_EAFLAG_LAST;
1157         } else
1158                 ea->ea_type = GFS2_EATYPE_UNUSED;
1159
1160         error = gfs2_meta_inode_buffer(ip, &dibh);
1161         if (!error) {
1162                 ip->i_di.di_ctime = get_seconds();
1163                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1164                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1165                 brelse(dibh);
1166         }       
1167
1168         gfs2_trans_end(ip->i_sbd);
1169
1170         return error;
1171 }
1172
1173 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1174 {
1175         struct gfs2_ea_location el;
1176         int error;
1177
1178         if (!ip->i_di.di_eattr)
1179                 return -ENODATA;
1180
1181         error = gfs2_ea_find(ip, er, &el);
1182         if (error)
1183                 return error;
1184         if (!el.el_ea)
1185                 return -ENODATA;
1186
1187         if (GFS2_EA_IS_STUFFED(el.el_ea))
1188                 error = ea_remove_stuffed(ip, &el);
1189         else
1190                 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1191                                             0);
1192
1193         brelse(el.el_bh);
1194
1195         return error;
1196 }
1197
1198 /**
1199  * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1200  * @ip: pointer to the inode of the target file
1201  * @er: request information
1202  *
1203  * Returns: errno
1204  */
1205
1206 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1207 {
1208         struct gfs2_holder i_gh;
1209         int error;
1210
1211         if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1212                 return -EINVAL;
1213
1214         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1215         if (error)
1216                 return error;
1217
1218         if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1219                 error = -EPERM;
1220         else
1221                 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1222
1223         gfs2_glock_dq_uninit(&i_gh);
1224
1225         return error;
1226 }
1227
1228 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1229                                   struct gfs2_ea_header *ea, char *data)
1230 {
1231         struct gfs2_sbd *sdp = ip->i_sbd;
1232         struct buffer_head **bh;
1233         unsigned int amount = GFS2_EA_DATA_LEN(ea);
1234         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1235         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1236         unsigned int x;
1237         int error;
1238
1239         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1240         if (!bh)
1241                 return -ENOMEM;
1242
1243         error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1244         if (error)
1245                 goto out;
1246
1247         for (x = 0; x < nptrs; x++) {
1248                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1249                                        DIO_START, bh + x);
1250                 if (error) {
1251                         while (x--)
1252                                 brelse(bh[x]);
1253                         goto fail;
1254                 }
1255                 dataptrs++;
1256         }
1257
1258         for (x = 0; x < nptrs; x++) {
1259                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1260                 if (error) {
1261                         for (; x < nptrs; x++)
1262                                 brelse(bh[x]);
1263                         goto fail;
1264                 }
1265                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1266                         for (; x < nptrs; x++)
1267                                 brelse(bh[x]);
1268                         error = -EIO;
1269                         goto fail;
1270                 }
1271
1272                 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1273
1274                 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1275                        data,
1276                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1277
1278                 amount -= sdp->sd_jbsize;
1279                 data += sdp->sd_jbsize;
1280
1281                 brelse(bh[x]);
1282         }
1283
1284  out:
1285         kfree(bh);
1286
1287         return error;
1288
1289  fail:
1290         gfs2_trans_end(sdp);
1291         kfree(bh);
1292
1293         return error;
1294 }
1295
1296 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1297                       struct iattr *attr, char *data)
1298 {
1299         struct buffer_head *dibh;
1300         int error;
1301
1302         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1303                 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1304                 if (error)
1305                         return error;
1306
1307                 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1308                 memcpy(GFS2_EA2DATA(el->el_ea),
1309                        data,
1310                        GFS2_EA_DATA_LEN(el->el_ea));
1311         } else
1312                 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1313
1314         if (error)
1315                 return error;
1316
1317         error = gfs2_meta_inode_buffer(ip, &dibh);
1318         if (!error) {
1319                 error = inode_setattr(ip->i_vnode, attr);
1320                 gfs2_assert_warn(ip->i_sbd, !error);
1321                 gfs2_inode_attr_out(ip);
1322                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1323                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1324                 brelse(dibh);
1325         }
1326
1327         gfs2_trans_end(ip->i_sbd);
1328
1329         return error;
1330 }
1331
1332 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1333 {
1334         struct gfs2_sbd *sdp = ip->i_sbd;
1335         struct gfs2_rgrp_list rlist;
1336         struct buffer_head *indbh, *dibh;
1337         uint64_t *eablk, *end;
1338         unsigned int rg_blocks = 0;
1339         uint64_t bstart = 0;
1340         unsigned int blen = 0;
1341         unsigned int blks = 0;
1342         unsigned int x;
1343         int error;
1344
1345         memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1346
1347         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1348                                DIO_START | DIO_WAIT, &indbh);
1349         if (error)
1350                 return error;
1351
1352         if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1353                 error = -EIO;
1354                 goto out;
1355         }
1356
1357         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1358         end = eablk + sdp->sd_inptrs;
1359
1360         for (; eablk < end; eablk++) {
1361                 uint64_t bn;
1362
1363                 if (!*eablk)
1364                         break;
1365                 bn = be64_to_cpu(*eablk);
1366
1367                 if (bstart + blen == bn)
1368                         blen++;
1369                 else {
1370                         if (bstart)
1371                                 gfs2_rlist_add(sdp, &rlist, bstart);
1372                         bstart = bn;
1373                         blen = 1;
1374                 }
1375                 blks++;
1376         }
1377         if (bstart)
1378                 gfs2_rlist_add(sdp, &rlist, bstart);
1379         else
1380                 goto out;
1381
1382         gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1383
1384         for (x = 0; x < rlist.rl_rgrps; x++) {
1385                 struct gfs2_rgrpd *rgd;
1386                 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1387                 rg_blocks += rgd->rd_ri.ri_length;
1388         }
1389
1390         error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1391         if (error)
1392                 goto out_rlist_free;
1393
1394         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1395                                  RES_INDIRECT + RES_STATFS +
1396                                  RES_QUOTA, blks);
1397         if (error)
1398                 goto out_gunlock;
1399
1400         gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1401
1402         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1403         bstart = 0;
1404         blen = 0;
1405
1406         for (; eablk < end; eablk++) {
1407                 uint64_t bn;
1408
1409                 if (!*eablk)
1410                         break;
1411                 bn = be64_to_cpu(*eablk);
1412
1413                 if (bstart + blen == bn)
1414                         blen++;
1415                 else {
1416                         if (bstart)
1417                                 gfs2_free_meta(ip, bstart, blen);
1418                         bstart = bn;
1419                         blen = 1;
1420                 }
1421
1422                 *eablk = 0;
1423                 if (!ip->i_di.di_blocks)
1424                         gfs2_consist_inode(ip);
1425                 ip->i_di.di_blocks--;
1426         }
1427         if (bstart)
1428                 gfs2_free_meta(ip, bstart, blen);
1429
1430         ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1431
1432         error = gfs2_meta_inode_buffer(ip, &dibh);
1433         if (!error) {
1434                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1435                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1436                 brelse(dibh);
1437         }
1438
1439         gfs2_trans_end(sdp);
1440
1441  out_gunlock:
1442         gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1443
1444  out_rlist_free:
1445         gfs2_rlist_free(&rlist);
1446
1447  out:
1448         brelse(indbh);
1449
1450         return error;
1451 }
1452
1453 static int ea_dealloc_block(struct gfs2_inode *ip)
1454 {
1455         struct gfs2_sbd *sdp = ip->i_sbd;
1456         struct gfs2_alloc *al = &ip->i_alloc;
1457         struct gfs2_rgrpd *rgd;
1458         struct buffer_head *dibh;
1459         int error;
1460
1461         rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1462         if (!rgd) {
1463                 gfs2_consist_inode(ip);
1464                 return -EIO;
1465         }
1466
1467         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1468                                    &al->al_rgd_gh);
1469         if (error)
1470                 return error;
1471
1472         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1473                                  RES_STATFS + RES_QUOTA, 1);
1474         if (error)
1475                 goto out_gunlock;
1476
1477         gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1478
1479         ip->i_di.di_eattr = 0;
1480         if (!ip->i_di.di_blocks)
1481                 gfs2_consist_inode(ip);
1482         ip->i_di.di_blocks--;
1483
1484         error = gfs2_meta_inode_buffer(ip, &dibh);
1485         if (!error) {
1486                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1487                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1488                 brelse(dibh);
1489         }
1490
1491         gfs2_trans_end(sdp);
1492
1493  out_gunlock:
1494         gfs2_glock_dq_uninit(&al->al_rgd_gh);
1495
1496         return error;
1497 }
1498
1499 /**
1500  * gfs2_ea_dealloc - deallocate the extended attribute fork
1501  * @ip: the inode
1502  *
1503  * Returns: errno
1504  */
1505
1506 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1507 {
1508         struct gfs2_alloc *al;
1509         int error;
1510
1511         al = gfs2_alloc_get(ip);
1512
1513         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1514         if (error)
1515                 goto out_alloc;
1516
1517         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1518         if (error)
1519                 goto out_quota;
1520
1521         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1522         if (error)
1523                 goto out_rindex;
1524
1525         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1526                 error = ea_dealloc_indirect(ip);
1527                 if (error)
1528                         goto out_rindex;
1529         }
1530
1531         error = ea_dealloc_block(ip);
1532
1533  out_rindex:
1534         gfs2_glock_dq_uninit(&al->al_ri_gh);
1535
1536  out_quota:
1537         gfs2_quota_unhold(ip);
1538
1539  out_alloc:
1540         gfs2_alloc_put(ip);
1541
1542         return error;
1543 }
1544