3930304bc511ea5ebd7e276dcaee6ec67fd85980
[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/uaccess.h>
18
19 #include "gfs2.h"
20 #include "lm_interface.h"
21 #include "incore.h"
22 #include "acl.h"
23 #include "eaops.h"
24 #include "eattr.h"
25 #include "glock.h"
26 #include "inode.h"
27 #include "meta_io.h"
28 #include "quota.h"
29 #include "rgrp.h"
30 #include "trans.h"
31 #include "util.h"
32
33 /**
34  * ea_calc_size - returns the acutal number of bytes the request will take up
35  *                (not counting any unstuffed data blocks)
36  * @sdp:
37  * @er:
38  * @size:
39  *
40  * Returns: 1 if the EA should be stuffed
41  */
42
43 static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
44                         unsigned int *size)
45 {
46         *size = GFS2_EAREQ_SIZE_STUFFED(er);
47         if (*size <= sdp->sd_jbsize)
48                 return 1;
49
50         *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
51
52         return 0;
53 }
54
55 static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
56 {
57         unsigned int size;
58
59         if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
60                 return -ERANGE;
61
62         ea_calc_size(sdp, er, &size);
63
64         /* This can only happen with 512 byte blocks */
65         if (size > sdp->sd_jbsize)
66                 return -ERANGE;
67
68         return 0;
69 }
70
71 typedef int (*ea_call_t) (struct gfs2_inode *ip,
72                           struct buffer_head *bh,
73                           struct gfs2_ea_header *ea,
74                           struct gfs2_ea_header *prev,
75                           void *private);
76
77 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
78                         ea_call_t ea_call, void *data)
79 {
80         struct gfs2_ea_header *ea, *prev = NULL;
81         int error = 0;
82
83         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA))
84                 return -EIO;
85
86         for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
87                 if (!GFS2_EA_REC_LEN(ea))
88                         goto fail;
89                 if (!(bh->b_data <= (char *)ea &&
90                       (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
110  fail:
111         gfs2_consist_inode(ip);
112         return -EIO;
113 }
114
115 static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
116 {
117         struct buffer_head *bh, *eabh;
118         uint64_t *eablk, *end;
119         int error;
120
121         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
122                                DIO_START | DIO_WAIT, &bh);
123         if (error)
124                 return error;
125
126         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
127                 error = ea_foreach_i(ip, bh, ea_call, data);
128                 goto out;
129         }
130
131         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
132                 error = -EIO;
133                 goto out;
134         }
135
136         eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
137         end = eablk + ip->i_sbd->sd_inptrs;
138
139         for (; eablk < end; eablk++) {
140                 uint64_t bn;
141
142                 if (!*eablk)
143                         break;
144                 bn = be64_to_cpu(*eablk);
145
146                 error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT,
147                                        &eabh);
148                 if (error)
149                         break;
150                 error = ea_foreach_i(ip, eabh, ea_call, data);
151                 brelse(eabh);
152                 if (error)
153                         break;
154         }
155  out:
156         brelse(bh);
157
158         return error;
159 }
160
161 struct ea_find {
162         struct gfs2_ea_request *ef_er;
163         struct gfs2_ea_location *ef_el;
164 };
165
166 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
167                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
168                      void *private)
169 {
170         struct ea_find *ef = private;
171         struct gfs2_ea_request *er = ef->ef_er;
172
173         if (ea->ea_type == GFS2_EATYPE_UNUSED)
174                 return 0;
175
176         if (ea->ea_type == er->er_type) {
177                 if (ea->ea_name_len == er->er_name_len &&
178                     !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
179                         struct gfs2_ea_location *el = ef->ef_el;
180                         get_bh(bh);
181                         el->el_bh = bh;
182                         el->el_ea = ea;
183                         el->el_prev = prev;
184                         return 1;
185                 }
186         }
187
188 #if 0
189         else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) &&
190                  er->er_type == GFS2_EATYPE_SYS)
191                 return 1;
192 #endif
193
194         return 0;
195 }
196
197 int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
198                  struct gfs2_ea_location *el)
199 {
200         struct ea_find ef;
201         int error;
202
203         ef.ef_er = er;
204         ef.ef_el = el;
205
206         memset(el, 0, sizeof(struct gfs2_ea_location));
207
208         error = ea_foreach(ip, ea_find_i, &ef);
209         if (error > 0)
210                 return 0;
211
212         return error;
213 }
214
215 /**
216  * ea_dealloc_unstuffed -
217  * @ip:
218  * @bh:
219  * @ea:
220  * @prev:
221  * @private:
222  *
223  * Take advantage of the fact that all unstuffed blocks are
224  * allocated from the same RG.  But watch, this may not always
225  * be true.
226  *
227  * Returns: errno
228  */
229
230 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
231                                 struct gfs2_ea_header *ea,
232                                 struct gfs2_ea_header *prev, void *private)
233 {
234         int *leave = private;
235         struct gfs2_sbd *sdp = ip->i_sbd;
236         struct gfs2_rgrpd *rgd;
237         struct gfs2_holder rg_gh;
238         struct buffer_head *dibh;
239         uint64_t *dataptrs, bn = 0;
240         uint64_t bstart = 0;
241         unsigned int blen = 0;
242         unsigned int blks = 0;
243         unsigned int x;
244         int error;
245
246         if (GFS2_EA_IS_STUFFED(ea))
247                 return 0;
248
249         dataptrs = GFS2_EA2DATAPTRS(ea);
250         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
251                 if (*dataptrs) {
252                         blks++;
253                         bn = be64_to_cpu(*dataptrs);
254                 }
255         if (!blks)
256                 return 0;
257
258         rgd = gfs2_blk2rgrpd(sdp, bn);
259         if (!rgd) {
260                 gfs2_consist_inode(ip);
261                 return -EIO;
262         }
263
264         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
265         if (error)
266                 return error;
267
268         error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length +
269                                  RES_DINODE + RES_EATTR + RES_STATFS +
270                                  RES_QUOTA, blks);
271         if (error)
272                 goto out_gunlock;
273
274         gfs2_trans_add_bh(ip->i_gl, bh, 1);
275
276         dataptrs = GFS2_EA2DATAPTRS(ea);
277         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
278                 if (!*dataptrs)
279                         break;
280                 bn = be64_to_cpu(*dataptrs);
281
282                 if (bstart + blen == bn)
283                         blen++;
284                 else {
285                         if (bstart)
286                                 gfs2_free_meta(ip, bstart, blen);
287                         bstart = bn;
288                         blen = 1;
289                 }
290
291                 *dataptrs = 0;
292                 if (!ip->i_di.di_blocks)
293                         gfs2_consist_inode(ip);
294                 ip->i_di.di_blocks--;
295         }
296         if (bstart)
297                 gfs2_free_meta(ip, bstart, blen);
298
299         if (prev && !leave) {
300                 uint32_t len;
301
302                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
303                 prev->ea_rec_len = cpu_to_be32(len);
304
305                 if (GFS2_EA_IS_LAST(ea))
306                         prev->ea_flags |= GFS2_EAFLAG_LAST;
307         } else {
308                 ea->ea_type = GFS2_EATYPE_UNUSED;
309                 ea->ea_num_ptrs = 0;
310         }
311
312         error = gfs2_meta_inode_buffer(ip, &dibh);
313         if (!error) {
314                 ip->i_di.di_ctime = get_seconds();
315                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
316                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
317                 brelse(dibh);
318         }
319
320         gfs2_trans_end(sdp);
321
322  out_gunlock:
323         gfs2_glock_dq_uninit(&rg_gh);
324
325         return error;
326 }
327
328 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
329                                struct gfs2_ea_header *ea,
330                                struct gfs2_ea_header *prev, int leave)
331 {
332         struct gfs2_alloc *al;
333         int error;
334
335         al = gfs2_alloc_get(ip);
336
337         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
338         if (error)
339                 goto out_alloc;
340
341         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
342         if (error)
343                 goto out_quota;
344
345         error = ea_dealloc_unstuffed(ip,
346                                      bh, ea, prev,
347                                      (leave) ? &error : NULL);
348
349         gfs2_glock_dq_uninit(&al->al_ri_gh);
350
351  out_quota:
352         gfs2_quota_unhold(ip);
353
354  out_alloc:
355         gfs2_alloc_put(ip);
356
357         return error;
358 }
359
360 struct ea_list {
361         struct gfs2_ea_request *ei_er;
362         unsigned int ei_size;
363 };
364
365 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
366                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
367                      void *private)
368 {
369         struct ea_list *ei = private;
370         struct gfs2_ea_request *er = ei->ei_er;
371         unsigned int ea_size = GFS2_EA_STRLEN(ea);
372
373         if (ea->ea_type == GFS2_EATYPE_UNUSED)
374                 return 0;
375
376         if (er->er_data_len) {
377                 char *prefix;
378                 unsigned int l;
379                 char c = 0;
380
381                 if (ei->ei_size + ea_size > er->er_data_len)
382                         return -ERANGE;
383
384                 if (ea->ea_type == GFS2_EATYPE_USR) {
385                         prefix = "user.";
386                         l = 5;
387                 } else {
388                         prefix = "system.";
389                         l = 7;
390                 }
391
392                 memcpy(er->er_data + ei->ei_size,
393                        prefix, l);
394                 memcpy(er->er_data + ei->ei_size + l,
395                        GFS2_EA2NAME(ea),
396                        ea->ea_name_len);
397                 memcpy(er->er_data + ei->ei_size +
398                        ea_size - 1,
399                        &c, 1);
400         }
401
402         ei->ei_size += ea_size;
403
404         return 0;
405 }
406
407 /**
408  * gfs2_ea_list -
409  * @ip:
410  * @er:
411  *
412  * Returns: actual size of data on success, -errno on error
413  */
414
415 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
416 {
417         struct gfs2_holder i_gh;
418         int error;
419
420         if (!er->er_data || !er->er_data_len) {
421                 er->er_data = NULL;
422                 er->er_data_len = 0;
423         }
424
425         error = gfs2_glock_nq_init(ip->i_gl,
426                                   LM_ST_SHARED, LM_FLAG_ANY,
427                                   &i_gh);
428         if (error)
429                 return error;
430
431         if (ip->i_di.di_eattr) {
432                 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
433
434                 error = ea_foreach(ip, ea_list_i, &ei);
435                 if (!error)
436                         error = ei.ei_size;
437         }
438
439         gfs2_glock_dq_uninit(&i_gh);
440
441         return error;
442 }
443
444 /**
445  * ea_get_unstuffed - actually copies the unstuffed data into the
446  *                    request buffer
447  * @ip:
448  * @ea:
449  * @data:
450  *
451  * Returns: errno
452  */
453
454 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
455                             char *data)
456 {
457         struct gfs2_sbd *sdp = ip->i_sbd;
458         struct buffer_head **bh;
459         unsigned int amount = GFS2_EA_DATA_LEN(ea);
460         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
461         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
462         unsigned int x;
463         int error = 0;
464
465         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
466         if (!bh)
467                 return -ENOMEM;
468
469         for (x = 0; x < nptrs; x++) {
470                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
471                                        DIO_START, bh + x);
472                 if (error) {
473                         while (x--)
474                                 brelse(bh[x]);
475                         goto out;
476                 }
477                 dataptrs++;
478         }
479
480         for (x = 0; x < nptrs; x++) {
481                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
482                 if (error) {
483                         for (; x < nptrs; x++)
484                                 brelse(bh[x]);
485                         goto out;
486                 }
487                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
488                         for (; x < nptrs; x++)
489                                 brelse(bh[x]);
490                         error = -EIO;
491                         goto out;
492                 }
493
494                 memcpy(data,
495                        bh[x]->b_data + sizeof(struct gfs2_meta_header),
496                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
497
498                 amount -= sdp->sd_jbsize;
499                 data += sdp->sd_jbsize;
500
501                 brelse(bh[x]);
502         }
503
504  out:
505         kfree(bh);
506
507         return error;
508 }
509
510 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
511                      char *data)
512 {
513         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
514                 memcpy(data,
515                        GFS2_EA2DATA(el->el_ea),
516                        GFS2_EA_DATA_LEN(el->el_ea));
517                 return 0;
518         } else
519                 return ea_get_unstuffed(ip, el->el_ea, data);
520 }
521
522 /**
523  * gfs2_ea_get_i -
524  * @ip:
525  * @er:
526  *
527  * Returns: actual size of data on success, -errno on error
528  */
529
530 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
531 {
532         struct gfs2_ea_location el;
533         int error;
534
535         if (!ip->i_di.di_eattr)
536                 return -ENODATA;
537
538         error = gfs2_ea_find(ip, er, &el);
539         if (error)
540                 return error;
541         if (!el.el_ea)
542                 return -ENODATA;
543
544         if (er->er_data_len) {
545                 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
546                         error =  -ERANGE;
547                 else
548                         error = gfs2_ea_get_copy(ip, &el, er->er_data);
549         }
550         if (!error)
551                 error = GFS2_EA_DATA_LEN(el.el_ea);
552
553         brelse(el.el_bh);
554
555         return error;
556 }
557
558 /**
559  * gfs2_ea_get -
560  * @ip:
561  * @er:
562  *
563  * Returns: actual size of data on success, -errno on error
564  */
565
566 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
567 {
568         struct gfs2_holder i_gh;
569         int error;
570
571         if (!er->er_name_len ||
572             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
573                 return -EINVAL;
574         if (!er->er_data || !er->er_data_len) {
575                 er->er_data = NULL;
576                 er->er_data_len = 0;
577         }
578
579         error = gfs2_glock_nq_init(ip->i_gl,
580                                   LM_ST_SHARED, LM_FLAG_ANY,
581                                   &i_gh);
582         if (error)
583                 return error;
584
585         error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
586
587         gfs2_glock_dq_uninit(&i_gh);
588
589         return error;
590 }
591
592 /**
593  * ea_alloc_blk - allocates a new block for extended attributes.
594  * @ip: A pointer to the inode that's getting extended attributes
595  * @bhp:
596  *
597  * Returns: errno
598  */
599
600 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
601 {
602         struct gfs2_sbd *sdp = ip->i_sbd;
603         struct gfs2_ea_header *ea;
604         uint64_t block;
605
606         block = gfs2_alloc_meta(ip);
607
608         *bhp = gfs2_meta_new(ip->i_gl, block);
609         gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
610         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
611         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
612
613         ea = GFS2_EA_BH2FIRST(*bhp);
614         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
615         ea->ea_type = GFS2_EATYPE_UNUSED;
616         ea->ea_flags = GFS2_EAFLAG_LAST;
617         ea->ea_num_ptrs = 0;
618
619         ip->i_di.di_blocks++;
620
621         return 0;
622 }
623
624 /**
625  * ea_write - writes the request info to an ea, creating new blocks if
626  *            necessary
627  * @ip:  inode that is being modified
628  * @ea:  the location of the new ea in a block
629  * @er: the write request
630  *
631  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
632  *
633  * returns : errno
634  */
635
636 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
637                     struct gfs2_ea_request *er)
638 {
639         struct gfs2_sbd *sdp = ip->i_sbd;
640
641         ea->ea_data_len = cpu_to_be32(er->er_data_len);
642         ea->ea_name_len = er->er_name_len;
643         ea->ea_type = er->er_type;
644         ea->__pad = 0;
645
646         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
647
648         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
649                 ea->ea_num_ptrs = 0;
650                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
651         } else {
652                 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
653                 const char *data = er->er_data;
654                 unsigned int data_len = er->er_data_len;
655                 unsigned int copy;
656                 unsigned int x;
657
658                 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
659                 for (x = 0; x < ea->ea_num_ptrs; x++) {
660                         struct buffer_head *bh;
661                         uint64_t block;
662                         int mh_size = sizeof(struct gfs2_meta_header);
663
664                         block = gfs2_alloc_meta(ip);
665
666                         bh = gfs2_meta_new(ip->i_gl, block);
667                         gfs2_trans_add_bh(ip->i_gl, bh, 1);
668                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
669
670                         ip->i_di.di_blocks++;
671
672                         copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
673                                                              data_len;
674                         memcpy(bh->b_data + mh_size, data, copy);
675                         if (copy < sdp->sd_jbsize)
676                                 memset(bh->b_data + mh_size + copy, 0,
677                                        sdp->sd_jbsize - copy);
678
679                         *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
680                         data += copy;
681                         data_len -= copy;
682
683                         brelse(bh);
684                 }
685
686                 gfs2_assert_withdraw(sdp, !data_len);
687         }
688
689         return 0;
690 }
691
692 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
693                                    struct gfs2_ea_request *er,
694                                    void *private);
695
696 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
697                              unsigned int blks,
698                              ea_skeleton_call_t skeleton_call,
699                              void *private)
700 {
701         struct gfs2_alloc *al;
702         struct buffer_head *dibh;
703         int error;
704
705         al = gfs2_alloc_get(ip);
706
707         error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
708         if (error)
709                 goto out;
710
711         error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
712         if (error)
713                 goto out_gunlock_q;
714
715         al->al_requested = blks;
716
717         error = gfs2_inplace_reserve(ip);
718         if (error)
719                 goto out_gunlock_q;
720
721         error = gfs2_trans_begin(ip->i_sbd,
722                                  blks + al->al_rgd->rd_ri.ri_length +
723                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
724         if (error)
725                 goto out_ipres;
726
727         error = skeleton_call(ip, er, private);
728         if (error)
729                 goto out_end_trans;
730
731         error = gfs2_meta_inode_buffer(ip, &dibh);
732         if (!error) {
733                 if (er->er_flags & GFS2_ERF_MODE) {
734                         gfs2_assert_withdraw(ip->i_sbd,
735                                             (ip->i_di.di_mode & S_IFMT) ==
736                                             (er->er_mode & S_IFMT));
737                         ip->i_di.di_mode = er->er_mode;
738                 }
739                 ip->i_di.di_ctime = get_seconds();
740                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
741                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
742                 brelse(dibh);
743         }
744
745  out_end_trans:
746         gfs2_trans_end(ip->i_sbd);
747
748  out_ipres:
749         gfs2_inplace_release(ip);
750
751  out_gunlock_q:
752         gfs2_quota_unlock(ip);
753
754  out:
755         gfs2_alloc_put(ip);
756
757         return error;
758 }
759
760 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
761                      void *private)
762 {
763         struct buffer_head *bh;
764         int error;
765
766         error = ea_alloc_blk(ip, &bh);
767         if (error)
768                 return error;
769
770         ip->i_di.di_eattr = bh->b_blocknr;
771         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
772
773         brelse(bh);
774
775         return error;
776 }
777
778 /**
779  * ea_init - initializes a new eattr block
780  * @ip:
781  * @er:
782  *
783  * Returns: errno
784  */
785
786 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
787 {
788         unsigned int jbsize = ip->i_sbd->sd_jbsize;
789         unsigned int blks = 1;
790
791         if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
792                 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
793
794         return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
795 }
796
797 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
798 {
799         uint32_t ea_size = GFS2_EA_SIZE(ea);
800         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
801                                      ea_size);
802         uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
803         int last = ea->ea_flags & GFS2_EAFLAG_LAST;
804
805         ea->ea_rec_len = cpu_to_be32(ea_size);
806         ea->ea_flags ^= last;
807
808         new->ea_rec_len = cpu_to_be32(new_size);
809         new->ea_flags = last;
810
811         return new;
812 }
813
814 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
815                                   struct gfs2_ea_location *el)
816 {
817         struct gfs2_ea_header *ea = el->el_ea;
818         struct gfs2_ea_header *prev = el->el_prev;
819         uint32_t len;
820
821         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
822
823         if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
824                 ea->ea_type = GFS2_EATYPE_UNUSED;
825                 return;
826         } else if (GFS2_EA2NEXT(prev) != ea) {
827                 prev = GFS2_EA2NEXT(prev);
828                 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
829         }
830
831         len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
832         prev->ea_rec_len = cpu_to_be32(len);
833
834         if (GFS2_EA_IS_LAST(ea))
835                 prev->ea_flags |= GFS2_EAFLAG_LAST;
836 }
837
838 struct ea_set {
839         int ea_split;
840
841         struct gfs2_ea_request *es_er;
842         struct gfs2_ea_location *es_el;
843
844         struct buffer_head *es_bh;
845         struct gfs2_ea_header *es_ea;
846 };
847
848 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
849                                  struct gfs2_ea_header *ea, struct ea_set *es)
850 {
851         struct gfs2_ea_request *er = es->es_er;
852         struct buffer_head *dibh;
853         int error;
854
855         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
856         if (error)
857                 return error;
858
859         gfs2_trans_add_bh(ip->i_gl, bh, 1);
860
861         if (es->ea_split)
862                 ea = ea_split_ea(ea);
863
864         ea_write(ip, ea, er);
865
866         if (es->es_el)
867                 ea_set_remove_stuffed(ip, es->es_el);
868
869         error = gfs2_meta_inode_buffer(ip, &dibh);
870         if (error)
871                 goto out;
872
873         if (er->er_flags & GFS2_ERF_MODE) {
874                 gfs2_assert_withdraw(ip->i_sbd,
875                         (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
876                 ip->i_di.di_mode = er->er_mode;
877         }
878         ip->i_di.di_ctime = get_seconds();
879         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
880         gfs2_dinode_out(&ip->i_di, dibh->b_data);
881         brelse(dibh);
882  out:
883         gfs2_trans_end(ip->i_sbd);
884
885         return error;
886 }
887
888 static 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
910 static 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(ip->i_sbd, es->es_er, &size);
920
921         if (ea->ea_type == GFS2_EATYPE_UNUSED) {
922                 if (GFS2_EA_REC_LEN(ea) < size)
923                         return 0;
924                 if (!GFS2_EA_IS_STUFFED(ea)) {
925                         error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
926                         if (error)
927                                 return error;
928                 }
929                 es->ea_split = 0;
930         } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
931                 es->ea_split = 1;
932         else
933                 return 0;
934
935         if (stuffed) {
936                 error = ea_set_simple_noalloc(ip, bh, ea, es);
937                 if (error)
938                         return error;
939         } else {
940                 unsigned int blks;
941
942                 es->es_bh = bh;
943                 es->es_ea = ea;
944                 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
945                                         ip->i_sbd->sd_jbsize);
946
947                 error = ea_alloc_skeleton(ip, es->es_er, blks,
948                                           ea_set_simple_alloc, es);
949                 if (error)
950                         return error;
951         }
952
953         return 1;
954 }
955
956 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
957                         void *private)
958 {
959         struct gfs2_sbd *sdp = ip->i_sbd;
960         struct buffer_head *indbh, *newbh;
961         uint64_t *eablk;
962         int error;
963         int mh_size = sizeof(struct gfs2_meta_header);
964
965         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
966                 uint64_t *end;
967
968                 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
969                                        DIO_START | DIO_WAIT, &indbh);
970                 if (error)
971                         return error;
972
973                 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
974                         error = -EIO;
975                         goto out;
976                 }
977
978                 eablk = (uint64_t *)(indbh->b_data + mh_size);
979                 end = eablk + sdp->sd_inptrs;
980
981                 for (; eablk < end; eablk++)
982                         if (!*eablk)
983                                 break;
984
985                 if (eablk == end) {
986                         error = -ENOSPC;
987                         goto out;
988                 }
989
990                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
991         } else {
992                 uint64_t blk;
993
994                 blk = gfs2_alloc_meta(ip);
995
996                 indbh = gfs2_meta_new(ip->i_gl, blk);
997                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
998                 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
999                 gfs2_buffer_clear_tail(indbh, mh_size);
1000
1001                 eablk = (uint64_t *)(indbh->b_data + mh_size);
1002                 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1003                 ip->i_di.di_eattr = blk;
1004                 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1005                 ip->i_di.di_blocks++;
1006
1007                 eablk++;
1008         }
1009
1010         error = ea_alloc_blk(ip, &newbh);
1011         if (error)
1012                 goto out;
1013
1014         *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1015         error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1016         brelse(newbh);
1017         if (error)
1018                 goto out;
1019
1020         if (private)
1021                 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1022
1023  out:
1024         brelse(indbh);
1025
1026         return error;
1027 }
1028
1029 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1030                     struct gfs2_ea_location *el)
1031 {
1032         struct ea_set es;
1033         unsigned int blks = 2;
1034         int error;
1035
1036         memset(&es, 0, sizeof(struct ea_set));
1037         es.es_er = er;
1038         es.es_el = el;
1039
1040         error = ea_foreach(ip, ea_set_simple, &es);
1041         if (error > 0)
1042                 return 0;
1043         if (error)
1044                 return error;
1045
1046         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1047                 blks++;
1048         if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
1049                 blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize);
1050
1051         return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1052 }
1053
1054 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1055                                    struct gfs2_ea_location *el)
1056 {
1057         if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1058                 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1059                 gfs2_assert_withdraw(ip->i_sbd,
1060                                      GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1061         }
1062
1063         return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1064 }
1065
1066 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1067 {
1068         struct gfs2_ea_location el;
1069         int error;
1070
1071         if (!ip->i_di.di_eattr) {
1072                 if (er->er_flags & XATTR_REPLACE)
1073                         return -ENODATA;
1074                 return ea_init(ip, er);
1075         }
1076
1077         error = gfs2_ea_find(ip, er, &el);
1078         if (error)
1079                 return error;
1080
1081         if (el.el_ea) {
1082                 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1083                         brelse(el.el_bh);
1084                         return -EPERM;
1085                 }
1086
1087                 error = -EEXIST;
1088                 if (!(er->er_flags & XATTR_CREATE)) {
1089                         int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1090                         error = ea_set_i(ip, er, &el);
1091                         if (!error && unstuffed)
1092                                 ea_set_remove_unstuffed(ip, &el);
1093                 }
1094
1095                 brelse(el.el_bh);
1096         } else {
1097                 error = -ENODATA;
1098                 if (!(er->er_flags & XATTR_REPLACE))
1099                         error = ea_set_i(ip, er, NULL);
1100         }
1101
1102         return error;
1103 }
1104
1105 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1106 {
1107         struct gfs2_holder i_gh;
1108         int error;
1109
1110         if (!er->er_name_len ||
1111             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1112                 return -EINVAL;
1113         if (!er->er_data || !er->er_data_len) {
1114                 er->er_data = NULL;
1115                 er->er_data_len = 0;
1116         }
1117         error = ea_check_size(ip->i_sbd, er);
1118         if (error)
1119                 return error;
1120
1121         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1122         if (error)
1123                 return error;
1124
1125         if (IS_IMMUTABLE(ip->i_vnode))
1126                 error = -EPERM;
1127         else
1128                 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1129
1130         gfs2_glock_dq_uninit(&i_gh);
1131
1132         return error;
1133 }
1134
1135 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1136 {
1137         struct gfs2_ea_header *ea = el->el_ea;
1138         struct gfs2_ea_header *prev = el->el_prev;
1139         struct buffer_head *dibh;
1140         int error;
1141
1142         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1143         if (error)
1144                 return error;
1145
1146         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1147
1148         if (prev) {
1149                 uint32_t len;
1150
1151                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1152                 prev->ea_rec_len = cpu_to_be32(len);
1153
1154                 if (GFS2_EA_IS_LAST(ea))
1155                         prev->ea_flags |= GFS2_EAFLAG_LAST;
1156         } else
1157                 ea->ea_type = GFS2_EATYPE_UNUSED;
1158
1159         error = gfs2_meta_inode_buffer(ip, &dibh);
1160         if (!error) {
1161                 ip->i_di.di_ctime = get_seconds();
1162                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1163                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1164                 brelse(dibh);
1165         }       
1166
1167         gfs2_trans_end(ip->i_sbd);
1168
1169         return error;
1170 }
1171
1172 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1173 {
1174         struct gfs2_ea_location el;
1175         int error;
1176
1177         if (!ip->i_di.di_eattr)
1178                 return -ENODATA;
1179
1180         error = gfs2_ea_find(ip, er, &el);
1181         if (error)
1182                 return error;
1183         if (!el.el_ea)
1184                 return -ENODATA;
1185
1186         if (GFS2_EA_IS_STUFFED(el.el_ea))
1187                 error = ea_remove_stuffed(ip, &el);
1188         else
1189                 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1190                                             0);
1191
1192         brelse(el.el_bh);
1193
1194         return error;
1195 }
1196
1197 /**
1198  * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1199  * @ip: pointer to the inode of the target file
1200  * @er: request information
1201  *
1202  * Returns: errno
1203  */
1204
1205 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1206 {
1207         struct gfs2_holder i_gh;
1208         int error;
1209
1210         if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1211                 return -EINVAL;
1212
1213         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1214         if (error)
1215                 return error;
1216
1217         if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1218                 error = -EPERM;
1219         else
1220                 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1221
1222         gfs2_glock_dq_uninit(&i_gh);
1223
1224         return error;
1225 }
1226
1227 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1228                                   struct gfs2_ea_header *ea, char *data)
1229 {
1230         struct gfs2_sbd *sdp = ip->i_sbd;
1231         struct buffer_head **bh;
1232         unsigned int amount = GFS2_EA_DATA_LEN(ea);
1233         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1234         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1235         unsigned int x;
1236         int error;
1237
1238         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1239         if (!bh)
1240                 return -ENOMEM;
1241
1242         error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1243         if (error)
1244                 goto out;
1245
1246         for (x = 0; x < nptrs; x++) {
1247                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1248                                        DIO_START, bh + x);
1249                 if (error) {
1250                         while (x--)
1251                                 brelse(bh[x]);
1252                         goto fail;
1253                 }
1254                 dataptrs++;
1255         }
1256
1257         for (x = 0; x < nptrs; x++) {
1258                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1259                 if (error) {
1260                         for (; x < nptrs; x++)
1261                                 brelse(bh[x]);
1262                         goto fail;
1263                 }
1264                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1265                         for (; x < nptrs; x++)
1266                                 brelse(bh[x]);
1267                         error = -EIO;
1268                         goto fail;
1269                 }
1270
1271                 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1272
1273                 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1274                        data,
1275                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1276
1277                 amount -= sdp->sd_jbsize;
1278                 data += sdp->sd_jbsize;
1279
1280                 brelse(bh[x]);
1281         }
1282
1283  out:
1284         kfree(bh);
1285
1286         return error;
1287
1288  fail:
1289         gfs2_trans_end(sdp);
1290         kfree(bh);
1291
1292         return error;
1293 }
1294
1295 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1296                       struct iattr *attr, char *data)
1297 {
1298         struct buffer_head *dibh;
1299         int error;
1300
1301         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1302                 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1303                 if (error)
1304                         return error;
1305
1306                 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1307                 memcpy(GFS2_EA2DATA(el->el_ea),
1308                        data,
1309                        GFS2_EA_DATA_LEN(el->el_ea));
1310         } else
1311                 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1312
1313         if (error)
1314                 return error;
1315
1316         error = gfs2_meta_inode_buffer(ip, &dibh);
1317         if (!error) {
1318                 error = inode_setattr(ip->i_vnode, attr);
1319                 gfs2_assert_warn(ip->i_sbd, !error);
1320                 gfs2_inode_attr_out(ip);
1321                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1322                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1323                 brelse(dibh);
1324         }
1325
1326         gfs2_trans_end(ip->i_sbd);
1327
1328         return error;
1329 }
1330
1331 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1332 {
1333         struct gfs2_sbd *sdp = ip->i_sbd;
1334         struct gfs2_rgrp_list rlist;
1335         struct buffer_head *indbh, *dibh;
1336         uint64_t *eablk, *end;
1337         unsigned int rg_blocks = 0;
1338         uint64_t bstart = 0;
1339         unsigned int blen = 0;
1340         unsigned int blks = 0;
1341         unsigned int x;
1342         int error;
1343
1344         memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1345
1346         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1347                                DIO_START | DIO_WAIT, &indbh);
1348         if (error)
1349                 return error;
1350
1351         if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1352                 error = -EIO;
1353                 goto out;
1354         }
1355
1356         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1357         end = eablk + sdp->sd_inptrs;
1358
1359         for (; eablk < end; eablk++) {
1360                 uint64_t bn;
1361
1362                 if (!*eablk)
1363                         break;
1364                 bn = be64_to_cpu(*eablk);
1365
1366                 if (bstart + blen == bn)
1367                         blen++;
1368                 else {
1369                         if (bstart)
1370                                 gfs2_rlist_add(sdp, &rlist, bstart);
1371                         bstart = bn;
1372                         blen = 1;
1373                 }
1374                 blks++;
1375         }
1376         if (bstart)
1377                 gfs2_rlist_add(sdp, &rlist, bstart);
1378         else
1379                 goto out;
1380
1381         gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1382
1383         for (x = 0; x < rlist.rl_rgrps; x++) {
1384                 struct gfs2_rgrpd *rgd;
1385                 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1386                 rg_blocks += rgd->rd_ri.ri_length;
1387         }
1388
1389         error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1390         if (error)
1391                 goto out_rlist_free;
1392
1393         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1394                                  RES_INDIRECT + RES_STATFS +
1395                                  RES_QUOTA, blks);
1396         if (error)
1397                 goto out_gunlock;
1398
1399         gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1400
1401         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1402         bstart = 0;
1403         blen = 0;
1404
1405         for (; eablk < end; eablk++) {
1406                 uint64_t bn;
1407
1408                 if (!*eablk)
1409                         break;
1410                 bn = be64_to_cpu(*eablk);
1411
1412                 if (bstart + blen == bn)
1413                         blen++;
1414                 else {
1415                         if (bstart)
1416                                 gfs2_free_meta(ip, bstart, blen);
1417                         bstart = bn;
1418                         blen = 1;
1419                 }
1420
1421                 *eablk = 0;
1422                 if (!ip->i_di.di_blocks)
1423                         gfs2_consist_inode(ip);
1424                 ip->i_di.di_blocks--;
1425         }
1426         if (bstart)
1427                 gfs2_free_meta(ip, bstart, blen);
1428
1429         ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1430
1431         error = gfs2_meta_inode_buffer(ip, &dibh);
1432         if (!error) {
1433                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1434                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1435                 brelse(dibh);
1436         }
1437
1438         gfs2_trans_end(sdp);
1439
1440  out_gunlock:
1441         gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1442
1443  out_rlist_free:
1444         gfs2_rlist_free(&rlist);
1445
1446  out:
1447         brelse(indbh);
1448
1449         return error;
1450 }
1451
1452 static int ea_dealloc_block(struct gfs2_inode *ip)
1453 {
1454         struct gfs2_sbd *sdp = ip->i_sbd;
1455         struct gfs2_alloc *al = &ip->i_alloc;
1456         struct gfs2_rgrpd *rgd;
1457         struct buffer_head *dibh;
1458         int error;
1459
1460         rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1461         if (!rgd) {
1462                 gfs2_consist_inode(ip);
1463                 return -EIO;
1464         }
1465
1466         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1467                                    &al->al_rgd_gh);
1468         if (error)
1469                 return error;
1470
1471         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1472                                  RES_STATFS + RES_QUOTA, 1);
1473         if (error)
1474                 goto out_gunlock;
1475
1476         gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1477
1478         ip->i_di.di_eattr = 0;
1479         if (!ip->i_di.di_blocks)
1480                 gfs2_consist_inode(ip);
1481         ip->i_di.di_blocks--;
1482
1483         error = gfs2_meta_inode_buffer(ip, &dibh);
1484         if (!error) {
1485                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1486                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1487                 brelse(dibh);
1488         }
1489
1490         gfs2_trans_end(sdp);
1491
1492  out_gunlock:
1493         gfs2_glock_dq_uninit(&al->al_rgd_gh);
1494
1495         return error;
1496 }
1497
1498 /**
1499  * gfs2_ea_dealloc - deallocate the extended attribute fork
1500  * @ip: the inode
1501  *
1502  * Returns: errno
1503  */
1504
1505 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1506 {
1507         struct gfs2_alloc *al;
1508         int error;
1509
1510         al = gfs2_alloc_get(ip);
1511
1512         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1513         if (error)
1514                 goto out_alloc;
1515
1516         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1517         if (error)
1518                 goto out_quota;
1519
1520         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1521         if (error)
1522                 goto out_rindex;
1523
1524         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1525                 error = ea_dealloc_indirect(ip);
1526                 if (error)
1527                         goto out_rindex;
1528         }
1529
1530         error = ea_dealloc_block(ip);
1531
1532  out_rindex:
1533         gfs2_glock_dq_uninit(&al->al_ri_gh);
1534
1535  out_quota:
1536         gfs2_quota_unhold(ip);
1537
1538  out_alloc:
1539         gfs2_alloc_put(ip);
1540
1541         return error;
1542 }
1543