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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 <asm/semaphore.h>
17 #include <asm/uaccess.h>
18
19 #include "gfs2.h"
20 #include "acl.h"
21 #include "eaops.h"
22 #include "eattr.h"
23 #include "glock.h"
24 #include "inode.h"
25 #include "meta_io.h"
26 #include "quota.h"
27 #include "rgrp.h"
28 #include "trans.h"
29
30 /**
31  * ea_calc_size - returns the acutal number of bytes the request will take up
32  *                (not counting any unstuffed data blocks)
33  * @sdp:
34  * @er:
35  * @size:
36  *
37  * Returns: 1 if the EA should be stuffed
38  */
39
40 static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
41                         unsigned int *size)
42 {
43         *size = GFS2_EAREQ_SIZE_STUFFED(er);
44         if (*size <= sdp->sd_jbsize)
45                 return 1;
46
47         *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
48
49         return 0;
50 }
51
52 static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
53 {
54         unsigned int size;
55
56         if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
57                 return -ERANGE;
58
59         ea_calc_size(sdp, er, &size);
60
61         /* This can only happen with 512 byte blocks */
62         if (size > sdp->sd_jbsize)
63                 return -ERANGE;
64
65         return 0;
66 }
67
68 typedef int (*ea_call_t) (struct gfs2_inode *ip,
69                           struct buffer_head *bh,
70                           struct gfs2_ea_header *ea,
71                           struct gfs2_ea_header *prev,
72                           void *private);
73
74 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
75                         ea_call_t ea_call, void *data)
76 {
77         struct gfs2_ea_header *ea, *prev = NULL;
78         int error = 0;
79
80         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA))
81                 return -EIO;
82
83         for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
84                 if (!GFS2_EA_REC_LEN(ea))
85                         goto fail;
86                 if (!(bh->b_data <= (char *)ea &&
87                       (char *)GFS2_EA2NEXT(ea) <=
88                       bh->b_data + bh->b_size))
89                         goto fail;
90                 if (!GFS2_EATYPE_VALID(ea->ea_type))
91                         goto fail;
92
93                 error = ea_call(ip, bh, ea, prev, data);
94                 if (error)
95                         return error;
96
97                 if (GFS2_EA_IS_LAST(ea)) {
98                         if ((char *)GFS2_EA2NEXT(ea) !=
99                             bh->b_data + bh->b_size)
100                                 goto fail;
101                         break;
102                 }
103         }
104
105         return error;
106
107  fail:
108         gfs2_consist_inode(ip);
109         return -EIO;
110 }
111
112 static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
113 {
114         struct buffer_head *bh, *eabh;
115         uint64_t *eablk, *end;
116         int error;
117
118         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
119                                DIO_START | DIO_WAIT, &bh);
120         if (error)
121                 return error;
122
123         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
124                 error = ea_foreach_i(ip, bh, ea_call, data);
125                 goto out;
126         }
127
128         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
129                 error = -EIO;
130                 goto out;
131         }
132
133         eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
134         end = eablk + ip->i_sbd->sd_inptrs;
135
136         for (; eablk < end; eablk++) {
137                 uint64_t bn;
138
139                 if (!*eablk)
140                         break;
141                 bn = be64_to_cpu(*eablk);
142
143                 error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT,
144                                        &eabh);
145                 if (error)
146                         break;
147                 error = ea_foreach_i(ip, eabh, ea_call, data);
148                 brelse(eabh);
149                 if (error)
150                         break;
151         }
152  out:
153         brelse(bh);
154
155         return error;
156 }
157
158 struct ea_find {
159         struct gfs2_ea_request *ef_er;
160         struct gfs2_ea_location *ef_el;
161 };
162
163 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
164                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
165                      void *private)
166 {
167         struct ea_find *ef = private;
168         struct gfs2_ea_request *er = ef->ef_er;
169
170         if (ea->ea_type == GFS2_EATYPE_UNUSED)
171                 return 0;
172
173         if (ea->ea_type == er->er_type) {
174                 if (ea->ea_name_len == er->er_name_len &&
175                     !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
176                         struct gfs2_ea_location *el = ef->ef_el;
177                         get_bh(bh);
178                         el->el_bh = bh;
179                         el->el_ea = ea;
180                         el->el_prev = prev;
181                         return 1;
182                 }
183         }
184
185 #if 0
186         else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) &&
187                  er->er_type == GFS2_EATYPE_SYS)
188                 return 1;
189 #endif
190
191         return 0;
192 }
193
194 int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
195                  struct gfs2_ea_location *el)
196 {
197         struct ea_find ef;
198         int error;
199
200         ef.ef_er = er;
201         ef.ef_el = el;
202
203         memset(el, 0, sizeof(struct gfs2_ea_location));
204
205         error = ea_foreach(ip, ea_find_i, &ef);
206         if (error > 0)
207                 return 0;
208
209         return error;
210 }
211
212 /**
213  * ea_dealloc_unstuffed -
214  * @ip:
215  * @bh:
216  * @ea:
217  * @prev:
218  * @private:
219  *
220  * Take advantage of the fact that all unstuffed blocks are
221  * allocated from the same RG.  But watch, this may not always
222  * be true.
223  *
224  * Returns: errno
225  */
226
227 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
228                                 struct gfs2_ea_header *ea,
229                                 struct gfs2_ea_header *prev, void *private)
230 {
231         int *leave = private;
232         struct gfs2_sbd *sdp = ip->i_sbd;
233         struct gfs2_rgrpd *rgd;
234         struct gfs2_holder rg_gh;
235         struct buffer_head *dibh;
236         uint64_t *dataptrs, bn = 0;
237         uint64_t bstart = 0;
238         unsigned int blen = 0;
239         unsigned int blks = 0;
240         unsigned int x;
241         int error;
242
243         if (GFS2_EA_IS_STUFFED(ea))
244                 return 0;
245
246         dataptrs = GFS2_EA2DATAPTRS(ea);
247         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
248                 if (*dataptrs) {
249                         blks++;
250                         bn = be64_to_cpu(*dataptrs);
251                 }
252         if (!blks)
253                 return 0;
254
255         rgd = gfs2_blk2rgrpd(sdp, bn);
256         if (!rgd) {
257                 gfs2_consist_inode(ip);
258                 return -EIO;
259         }
260
261         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
262         if (error)
263                 return error;
264
265         error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length +
266                                  RES_DINODE + RES_EATTR + RES_STATFS +
267                                  RES_QUOTA, blks);
268         if (error)
269                 goto out_gunlock;
270
271         gfs2_trans_add_bh(ip->i_gl, bh, 1);
272
273         dataptrs = GFS2_EA2DATAPTRS(ea);
274         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
275                 if (!*dataptrs)
276                         break;
277                 bn = be64_to_cpu(*dataptrs);
278
279                 if (bstart + blen == bn)
280                         blen++;
281                 else {
282                         if (bstart)
283                                 gfs2_free_meta(ip, bstart, blen);
284                         bstart = bn;
285                         blen = 1;
286                 }
287
288                 *dataptrs = 0;
289                 if (!ip->i_di.di_blocks)
290                         gfs2_consist_inode(ip);
291                 ip->i_di.di_blocks--;
292         }
293         if (bstart)
294                 gfs2_free_meta(ip, bstart, blen);
295
296         if (prev && !leave) {
297                 uint32_t len;
298
299                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
300                 prev->ea_rec_len = cpu_to_be32(len);
301
302                 if (GFS2_EA_IS_LAST(ea))
303                         prev->ea_flags |= GFS2_EAFLAG_LAST;
304         } else {
305                 ea->ea_type = GFS2_EATYPE_UNUSED;
306                 ea->ea_num_ptrs = 0;
307         }
308
309         error = gfs2_meta_inode_buffer(ip, &dibh);
310         if (!error) {
311                 ip->i_di.di_ctime = get_seconds();
312                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
313                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
314                 brelse(dibh);
315         }
316
317         gfs2_trans_end(sdp);
318
319  out_gunlock:
320         gfs2_glock_dq_uninit(&rg_gh);
321
322         return error;
323 }
324
325 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
326                                struct gfs2_ea_header *ea,
327                                struct gfs2_ea_header *prev, int leave)
328 {
329         struct gfs2_alloc *al;
330         int error;
331
332         al = gfs2_alloc_get(ip);
333
334         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
335         if (error)
336                 goto out_alloc;
337
338         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
339         if (error)
340                 goto out_quota;
341
342         error = ea_dealloc_unstuffed(ip,
343                                      bh, ea, prev,
344                                      (leave) ? &error : NULL);
345
346         gfs2_glock_dq_uninit(&al->al_ri_gh);
347
348  out_quota:
349         gfs2_quota_unhold(ip);
350
351  out_alloc:
352         gfs2_alloc_put(ip);
353
354         return error;
355 }
356
357
358 static int gfs2_ea_repack_i(struct gfs2_inode *ip)
359 {
360         return -EOPNOTSUPP;
361 }
362
363 int gfs2_ea_repack(struct gfs2_inode *ip)
364 {
365         struct gfs2_holder gh;
366         int error;
367
368         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
369         if (error)
370                 return error;
371
372         /* Some sort of permissions checking would be nice */
373
374         error = gfs2_ea_repack_i(ip);
375
376         gfs2_glock_dq_uninit(&gh);
377
378         return error;
379 }
380
381 struct ea_list {
382         struct gfs2_ea_request *ei_er;
383         unsigned int ei_size;
384 };
385
386 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
387                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
388                      void *private)
389 {
390         struct ea_list *ei = private;
391         struct gfs2_ea_request *er = ei->ei_er;
392         unsigned int ea_size = GFS2_EA_STRLEN(ea);
393
394         if (ea->ea_type == GFS2_EATYPE_UNUSED)
395                 return 0;
396
397         if (er->er_data_len) {
398                 char *prefix;
399                 unsigned int l;
400                 char c = 0;
401
402                 if (ei->ei_size + ea_size > er->er_data_len)
403                         return -ERANGE;
404
405                 if (ea->ea_type == GFS2_EATYPE_USR) {
406                         prefix = "user.";
407                         l = 5;
408                 } else {
409                         prefix = "system.";
410                         l = 7;
411                 }
412
413                 memcpy(er->er_data + ei->ei_size,
414                        prefix, l);
415                 memcpy(er->er_data + ei->ei_size + l,
416                        GFS2_EA2NAME(ea),
417                        ea->ea_name_len);
418                 memcpy(er->er_data + ei->ei_size +
419                        ea_size - 1,
420                        &c, 1);
421         }
422
423         ei->ei_size += ea_size;
424
425         return 0;
426 }
427
428 /**
429  * gfs2_ea_list -
430  * @ip:
431  * @er:
432  *
433  * Returns: actual size of data on success, -errno on error
434  */
435
436 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
437 {
438         struct gfs2_holder i_gh;
439         int error;
440
441         if (!er->er_data || !er->er_data_len) {
442                 er->er_data = NULL;
443                 er->er_data_len = 0;
444         }
445
446         error = gfs2_glock_nq_init(ip->i_gl,
447                                   LM_ST_SHARED, LM_FLAG_ANY,
448                                   &i_gh);
449         if (error)
450                 return error;
451
452         if (ip->i_di.di_eattr) {
453                 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
454
455                 error = ea_foreach(ip, ea_list_i, &ei);
456                 if (!error)
457                         error = ei.ei_size;
458         }
459
460         gfs2_glock_dq_uninit(&i_gh);
461
462         return error;
463 }
464
465 /**
466  * ea_get_unstuffed - actually copies the unstuffed data into the
467  *                    request buffer
468  * @ip:
469  * @ea:
470  * @data:
471  *
472  * Returns: errno
473  */
474
475 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
476                             char *data)
477 {
478         struct gfs2_sbd *sdp = ip->i_sbd;
479         struct buffer_head **bh;
480         unsigned int amount = GFS2_EA_DATA_LEN(ea);
481         unsigned int nptrs = DIV_RU(amount, sdp->sd_jbsize);
482         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
483         unsigned int x;
484         int error = 0;
485
486         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
487         if (!bh)
488                 return -ENOMEM;
489
490         for (x = 0; x < nptrs; x++) {
491                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
492                                        DIO_START, bh + x);
493                 if (error) {
494                         while (x--)
495                                 brelse(bh[x]);
496                         goto out;
497                 }
498                 dataptrs++;
499         }
500
501         for (x = 0; x < nptrs; x++) {
502                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
503                 if (error) {
504                         for (; x < nptrs; x++)
505                                 brelse(bh[x]);
506                         goto out;
507                 }
508                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
509                         for (; x < nptrs; x++)
510                                 brelse(bh[x]);
511                         error = -EIO;
512                         goto out;
513                 }
514
515                 memcpy(data,
516                        bh[x]->b_data + sizeof(struct gfs2_meta_header),
517                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
518
519                 amount -= sdp->sd_jbsize;
520                 data += sdp->sd_jbsize;
521
522                 brelse(bh[x]);
523         }
524
525  out:
526         kfree(bh);
527
528         return error;
529 }
530
531 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
532                      char *data)
533 {
534         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
535                 memcpy(data,
536                        GFS2_EA2DATA(el->el_ea),
537                        GFS2_EA_DATA_LEN(el->el_ea));
538                 return 0;
539         } else
540                 return ea_get_unstuffed(ip, el->el_ea, data);
541 }
542
543 /**
544  * gfs2_ea_get_i -
545  * @ip:
546  * @er:
547  *
548  * Returns: actual size of data on success, -errno on error
549  */
550
551 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
552 {
553         struct gfs2_ea_location el;
554         int error;
555
556         if (!ip->i_di.di_eattr)
557                 return -ENODATA;
558
559         error = gfs2_ea_find(ip, er, &el);
560         if (error)
561                 return error;
562         if (!el.el_ea)
563                 return -ENODATA;
564
565         if (er->er_data_len) {
566                 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
567                         error =  -ERANGE;
568                 else
569                         error = gfs2_ea_get_copy(ip, &el, er->er_data);
570         }
571         if (!error)
572                 error = GFS2_EA_DATA_LEN(el.el_ea);
573
574         brelse(el.el_bh);
575
576         return error;
577 }
578
579 /**
580  * gfs2_ea_get -
581  * @ip:
582  * @er:
583  *
584  * Returns: actual size of data on success, -errno on error
585  */
586
587 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
588 {
589         struct gfs2_holder i_gh;
590         int error;
591
592         if (!er->er_name_len ||
593             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
594                 return -EINVAL;
595         if (!er->er_data || !er->er_data_len) {
596                 er->er_data = NULL;
597                 er->er_data_len = 0;
598         }
599
600         error = gfs2_glock_nq_init(ip->i_gl,
601                                   LM_ST_SHARED, LM_FLAG_ANY,
602                                   &i_gh);
603         if (error)
604                 return error;
605
606         error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
607
608         gfs2_glock_dq_uninit(&i_gh);
609
610         return error;
611 }
612
613 /**
614  * ea_alloc_blk - allocates a new block for extended attributes.
615  * @ip: A pointer to the inode that's getting extended attributes
616  * @bhp:
617  *
618  * Returns: errno
619  */
620
621 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
622 {
623         struct gfs2_sbd *sdp = ip->i_sbd;
624         struct gfs2_ea_header *ea;
625         uint64_t block;
626
627         block = gfs2_alloc_meta(ip);
628
629         *bhp = gfs2_meta_new(ip->i_gl, block);
630         gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
631         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
632         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
633
634         ea = GFS2_EA_BH2FIRST(*bhp);
635         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
636         ea->ea_type = GFS2_EATYPE_UNUSED;
637         ea->ea_flags = GFS2_EAFLAG_LAST;
638         ea->ea_num_ptrs = 0;
639
640         ip->i_di.di_blocks++;
641
642         return 0;
643 }
644
645 /**
646  * ea_write - writes the request info to an ea, creating new blocks if
647  *            necessary
648  * @ip:  inode that is being modified
649  * @ea:  the location of the new ea in a block
650  * @er: the write request
651  *
652  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
653  *
654  * returns : errno
655  */
656
657 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
658                     struct gfs2_ea_request *er)
659 {
660         struct gfs2_sbd *sdp = ip->i_sbd;
661
662         ea->ea_data_len = cpu_to_be32(er->er_data_len);
663         ea->ea_name_len = er->er_name_len;
664         ea->ea_type = er->er_type;
665         ea->__pad = 0;
666
667         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
668
669         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
670                 ea->ea_num_ptrs = 0;
671                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
672         } else {
673                 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
674                 const char *data = er->er_data;
675                 unsigned int data_len = er->er_data_len;
676                 unsigned int copy;
677                 unsigned int x;
678
679                 ea->ea_num_ptrs = DIV_RU(er->er_data_len, sdp->sd_jbsize);
680                 for (x = 0; x < ea->ea_num_ptrs; x++) {
681                         struct buffer_head *bh;
682                         uint64_t block;
683                         int mh_size = sizeof(struct gfs2_meta_header);
684
685                         block = gfs2_alloc_meta(ip);
686
687                         bh = gfs2_meta_new(ip->i_gl, block);
688                         gfs2_trans_add_bh(ip->i_gl, bh, 1);
689                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
690
691                         ip->i_di.di_blocks++;
692
693                         copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
694                                                              data_len;
695                         memcpy(bh->b_data + mh_size, data, copy);
696                         if (copy < sdp->sd_jbsize)
697                                 memset(bh->b_data + mh_size + copy, 0,
698                                        sdp->sd_jbsize - copy);
699
700                         *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
701                         data += copy;
702                         data_len -= copy;
703
704                         brelse(bh);
705                 }
706
707                 gfs2_assert_withdraw(sdp, !data_len);
708         }
709
710         return 0;
711 }
712
713 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
714                                    struct gfs2_ea_request *er,
715                                    void *private);
716
717 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
718                              unsigned int blks,
719                              ea_skeleton_call_t skeleton_call,
720                              void *private)
721 {
722         struct gfs2_alloc *al;
723         struct buffer_head *dibh;
724         int error;
725
726         al = gfs2_alloc_get(ip);
727
728         error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
729         if (error)
730                 goto out;
731
732         error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
733         if (error)
734                 goto out_gunlock_q;
735
736         al->al_requested = blks;
737
738         error = gfs2_inplace_reserve(ip);
739         if (error)
740                 goto out_gunlock_q;
741
742         error = gfs2_trans_begin(ip->i_sbd,
743                                  blks + al->al_rgd->rd_ri.ri_length +
744                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
745         if (error)
746                 goto out_ipres;
747
748         error = skeleton_call(ip, er, private);
749         if (error)
750                 goto out_end_trans;
751
752         error = gfs2_meta_inode_buffer(ip, &dibh);
753         if (!error) {
754                 if (er->er_flags & GFS2_ERF_MODE) {
755                         gfs2_assert_withdraw(ip->i_sbd,
756                                             (ip->i_di.di_mode & S_IFMT) ==
757                                             (er->er_mode & S_IFMT));
758                         ip->i_di.di_mode = er->er_mode;
759                 }
760                 ip->i_di.di_ctime = get_seconds();
761                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
762                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
763                 brelse(dibh);
764         }
765
766  out_end_trans:
767         gfs2_trans_end(ip->i_sbd);
768
769  out_ipres:
770         gfs2_inplace_release(ip);
771
772  out_gunlock_q:
773         gfs2_quota_unlock(ip);
774
775  out:
776         gfs2_alloc_put(ip);
777
778         return error;
779 }
780
781 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
782                      void *private)
783 {
784         struct buffer_head *bh;
785         int error;
786
787         error = ea_alloc_blk(ip, &bh);
788         if (error)
789                 return error;
790
791         ip->i_di.di_eattr = bh->b_blocknr;
792         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
793
794         brelse(bh);
795
796         return error;
797 }
798
799 /**
800  * ea_init - initializes a new eattr block
801  * @ip:
802  * @er:
803  *
804  * Returns: errno
805  */
806
807 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
808 {
809         unsigned int jbsize = ip->i_sbd->sd_jbsize;
810         unsigned int blks = 1;
811
812         if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
813                 blks += DIV_RU(er->er_data_len, jbsize);
814
815         return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
816 }
817
818 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
819 {
820         uint32_t ea_size = GFS2_EA_SIZE(ea);
821         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
822                                      ea_size);
823         uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
824         int last = ea->ea_flags & GFS2_EAFLAG_LAST;
825
826         ea->ea_rec_len = cpu_to_be32(ea_size);
827         ea->ea_flags ^= last;
828
829         new->ea_rec_len = cpu_to_be32(new_size);
830         new->ea_flags = last;
831
832         return new;
833 }
834
835 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
836                                   struct gfs2_ea_location *el)
837 {
838         struct gfs2_ea_header *ea = el->el_ea;
839         struct gfs2_ea_header *prev = el->el_prev;
840         uint32_t len;
841
842         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
843
844         if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
845                 ea->ea_type = GFS2_EATYPE_UNUSED;
846                 return;
847         } else if (GFS2_EA2NEXT(prev) != ea) {
848                 prev = GFS2_EA2NEXT(prev);
849                 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
850         }
851
852         len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
853         prev->ea_rec_len = cpu_to_be32(len);
854
855         if (GFS2_EA_IS_LAST(ea))
856                 prev->ea_flags |= GFS2_EAFLAG_LAST;
857 }
858
859 struct ea_set {
860         int ea_split;
861
862         struct gfs2_ea_request *es_er;
863         struct gfs2_ea_location *es_el;
864
865         struct buffer_head *es_bh;
866         struct gfs2_ea_header *es_ea;
867 };
868
869 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
870                                  struct gfs2_ea_header *ea, struct ea_set *es)
871 {
872         struct gfs2_ea_request *er = es->es_er;
873         struct buffer_head *dibh;
874         int error;
875
876         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
877         if (error)
878                 return error;
879
880         gfs2_trans_add_bh(ip->i_gl, bh, 1);
881
882         if (es->ea_split)
883                 ea = ea_split_ea(ea);
884
885         ea_write(ip, ea, er);
886
887         if (es->es_el)
888                 ea_set_remove_stuffed(ip, es->es_el);
889
890         error = gfs2_meta_inode_buffer(ip, &dibh);
891         if (error)
892                 goto out;
893
894         if (er->er_flags & GFS2_ERF_MODE) {
895                 gfs2_assert_withdraw(ip->i_sbd,
896                         (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
897                 ip->i_di.di_mode = er->er_mode;
898         }
899         ip->i_di.di_ctime = get_seconds();
900         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
901         gfs2_dinode_out(&ip->i_di, dibh->b_data);
902         brelse(dibh);
903  out:
904         gfs2_trans_end(ip->i_sbd);
905
906         return error;
907 }
908
909 static int ea_set_simple_alloc(struct gfs2_inode *ip,
910                                struct gfs2_ea_request *er, void *private)
911 {
912         struct ea_set *es = private;
913         struct gfs2_ea_header *ea = es->es_ea;
914         int error;
915
916         gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
917
918         if (es->ea_split)
919                 ea = ea_split_ea(ea);
920
921         error = ea_write(ip, ea, er);
922         if (error)
923                 return error;
924
925         if (es->es_el)
926                 ea_set_remove_stuffed(ip, es->es_el);
927
928         return 0;
929 }
930
931 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
932                          struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
933                          void *private)
934 {
935         struct ea_set *es = private;
936         unsigned int size;
937         int stuffed;
938         int error;
939
940         stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size);
941
942         if (ea->ea_type == GFS2_EATYPE_UNUSED) {
943                 if (GFS2_EA_REC_LEN(ea) < size)
944                         return 0;
945                 if (!GFS2_EA_IS_STUFFED(ea)) {
946                         error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
947                         if (error)
948                                 return error;
949                 }
950                 es->ea_split = 0;
951         } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
952                 es->ea_split = 1;
953         else
954                 return 0;
955
956         if (stuffed) {
957                 error = ea_set_simple_noalloc(ip, bh, ea, es);
958                 if (error)
959                         return error;
960         } else {
961                 unsigned int blks;
962
963                 es->es_bh = bh;
964                 es->es_ea = ea;
965                 blks = 2 + DIV_RU(es->es_er->er_data_len, ip->i_sbd->sd_jbsize);
966
967                 error = ea_alloc_skeleton(ip, es->es_er, blks,
968                                           ea_set_simple_alloc, es);
969                 if (error)
970                         return error;
971         }
972
973         return 1;
974 }
975
976 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
977                         void *private)
978 {
979         struct gfs2_sbd *sdp = ip->i_sbd;
980         struct buffer_head *indbh, *newbh;
981         uint64_t *eablk;
982         int error;
983         int mh_size = sizeof(struct gfs2_meta_header);
984
985         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
986                 uint64_t *end;
987
988                 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
989                                        DIO_START | DIO_WAIT, &indbh);
990                 if (error)
991                         return error;
992
993                 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
994                         error = -EIO;
995                         goto out;
996                 }
997
998                 eablk = (uint64_t *)(indbh->b_data + mh_size);
999                 end = eablk + sdp->sd_inptrs;
1000
1001                 for (; eablk < end; eablk++)
1002                         if (!*eablk)
1003                                 break;
1004
1005                 if (eablk == end) {
1006                         error = -ENOSPC;
1007                         goto out;
1008                 }
1009
1010                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1011         } else {
1012                 uint64_t blk;
1013
1014                 blk = gfs2_alloc_meta(ip);
1015
1016                 indbh = gfs2_meta_new(ip->i_gl, blk);
1017                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1018                 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1019                 gfs2_buffer_clear_tail(indbh, mh_size);
1020
1021                 eablk = (uint64_t *)(indbh->b_data + mh_size);
1022                 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1023                 ip->i_di.di_eattr = blk;
1024                 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1025                 ip->i_di.di_blocks++;
1026
1027                 eablk++;
1028         }
1029
1030         error = ea_alloc_blk(ip, &newbh);
1031         if (error)
1032                 goto out;
1033
1034         *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1035         error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1036         brelse(newbh);
1037         if (error)
1038                 goto out;
1039
1040         if (private)
1041                 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1042
1043  out:
1044         brelse(indbh);
1045
1046         return error;
1047 }
1048
1049 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1050                     struct gfs2_ea_location *el)
1051 {
1052         struct ea_set es;
1053         unsigned int blks = 2;
1054         int error;
1055
1056         memset(&es, 0, sizeof(struct ea_set));
1057         es.es_er = er;
1058         es.es_el = el;
1059
1060         error = ea_foreach(ip, ea_set_simple, &es);
1061         if (error > 0)
1062                 return 0;
1063         if (error)
1064                 return error;
1065
1066         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1067                 blks++;
1068         if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
1069                 blks += DIV_RU(er->er_data_len, ip->i_sbd->sd_jbsize);
1070
1071         return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1072 }
1073
1074 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1075                                    struct gfs2_ea_location *el)
1076 {
1077         if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1078                 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1079                 gfs2_assert_withdraw(ip->i_sbd,
1080                                      GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1081         }
1082
1083         return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1084 }
1085
1086 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1087 {
1088         struct gfs2_ea_location el;
1089         int error;
1090
1091         if (!ip->i_di.di_eattr) {
1092                 if (er->er_flags & XATTR_REPLACE)
1093                         return -ENODATA;
1094                 return ea_init(ip, er);
1095         }
1096
1097         error = gfs2_ea_find(ip, er, &el);
1098         if (error)
1099                 return error;
1100
1101         if (el.el_ea) {
1102                 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1103                         brelse(el.el_bh);
1104                         return -EPERM;
1105                 }
1106
1107                 error = -EEXIST;
1108                 if (!(er->er_flags & XATTR_CREATE)) {
1109                         int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1110                         error = ea_set_i(ip, er, &el);
1111                         if (!error && unstuffed)
1112                                 ea_set_remove_unstuffed(ip, &el);
1113                 }
1114
1115                 brelse(el.el_bh);
1116         } else {
1117                 error = -ENODATA;
1118                 if (!(er->er_flags & XATTR_REPLACE))
1119                         error = ea_set_i(ip, er, NULL);
1120         }
1121
1122         return error;
1123 }
1124
1125 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1126 {
1127         struct gfs2_holder i_gh;
1128         int error;
1129
1130         if (!er->er_name_len ||
1131             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1132                 return -EINVAL;
1133         if (!er->er_data || !er->er_data_len) {
1134                 er->er_data = NULL;
1135                 er->er_data_len = 0;
1136         }
1137         error = ea_check_size(ip->i_sbd, er);
1138         if (error)
1139                 return error;
1140
1141         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1142         if (error)
1143                 return error;
1144
1145         if (IS_IMMUTABLE(ip->i_vnode))
1146                 error = -EPERM;
1147         else
1148                 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1149
1150         gfs2_glock_dq_uninit(&i_gh);
1151
1152         return error;
1153 }
1154
1155 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1156 {
1157         struct gfs2_ea_header *ea = el->el_ea;
1158         struct gfs2_ea_header *prev = el->el_prev;
1159         struct buffer_head *dibh;
1160         int error;
1161
1162         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1163         if (error)
1164                 return error;
1165
1166         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1167
1168         if (prev) {
1169                 uint32_t len;
1170
1171                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1172                 prev->ea_rec_len = cpu_to_be32(len);
1173
1174                 if (GFS2_EA_IS_LAST(ea))
1175                         prev->ea_flags |= GFS2_EAFLAG_LAST;
1176         } else
1177                 ea->ea_type = GFS2_EATYPE_UNUSED;
1178
1179         error = gfs2_meta_inode_buffer(ip, &dibh);
1180         if (!error) {
1181                 ip->i_di.di_ctime = get_seconds();
1182                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1183                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1184                 brelse(dibh);
1185         }       
1186
1187         gfs2_trans_end(ip->i_sbd);
1188
1189         return error;
1190 }
1191
1192 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1193 {
1194         struct gfs2_ea_location el;
1195         int error;
1196
1197         if (!ip->i_di.di_eattr)
1198                 return -ENODATA;
1199
1200         error = gfs2_ea_find(ip, er, &el);
1201         if (error)
1202                 return error;
1203         if (!el.el_ea)
1204                 return -ENODATA;
1205
1206         if (GFS2_EA_IS_STUFFED(el.el_ea))
1207                 error = ea_remove_stuffed(ip, &el);
1208         else
1209                 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1210                                             0);
1211
1212         brelse(el.el_bh);
1213
1214         return error;
1215 }
1216
1217 /**
1218  * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1219  * @ip: pointer to the inode of the target file
1220  * @er: request information
1221  *
1222  * Returns: errno
1223  */
1224
1225 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1226 {
1227         struct gfs2_holder i_gh;
1228         int error;
1229
1230         if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1231                 return -EINVAL;
1232
1233         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1234         if (error)
1235                 return error;
1236
1237         if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1238                 error = -EPERM;
1239         else
1240                 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1241
1242         gfs2_glock_dq_uninit(&i_gh);
1243
1244         return error;
1245 }
1246
1247 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1248                                   struct gfs2_ea_header *ea, char *data)
1249 {
1250         struct gfs2_sbd *sdp = ip->i_sbd;
1251         struct buffer_head **bh;
1252         unsigned int amount = GFS2_EA_DATA_LEN(ea);
1253         unsigned int nptrs = DIV_RU(amount, sdp->sd_jbsize);
1254         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1255         unsigned int x;
1256         int error;
1257
1258         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1259         if (!bh)
1260                 return -ENOMEM;
1261
1262         error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1263         if (error)
1264                 goto out;
1265
1266         for (x = 0; x < nptrs; x++) {
1267                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1268                                        DIO_START, bh + x);
1269                 if (error) {
1270                         while (x--)
1271                                 brelse(bh[x]);
1272                         goto fail;
1273                 }
1274                 dataptrs++;
1275         }
1276
1277         for (x = 0; x < nptrs; x++) {
1278                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1279                 if (error) {
1280                         for (; x < nptrs; x++)
1281                                 brelse(bh[x]);
1282                         goto fail;
1283                 }
1284                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1285                         for (; x < nptrs; x++)
1286                                 brelse(bh[x]);
1287                         error = -EIO;
1288                         goto fail;
1289                 }
1290
1291                 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1292
1293                 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1294                        data,
1295                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1296
1297                 amount -= sdp->sd_jbsize;
1298                 data += sdp->sd_jbsize;
1299
1300                 brelse(bh[x]);
1301         }
1302
1303  out:
1304         kfree(bh);
1305
1306         return error;
1307
1308  fail:
1309         gfs2_trans_end(sdp);
1310         kfree(bh);
1311
1312         return error;
1313 }
1314
1315 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1316                       struct iattr *attr, char *data)
1317 {
1318         struct buffer_head *dibh;
1319         int error;
1320
1321         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1322                 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1323                 if (error)
1324                         return error;
1325
1326                 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1327                 memcpy(GFS2_EA2DATA(el->el_ea),
1328                        data,
1329                        GFS2_EA_DATA_LEN(el->el_ea));
1330         } else
1331                 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1332
1333         if (error)
1334                 return error;
1335
1336         error = gfs2_meta_inode_buffer(ip, &dibh);
1337         if (!error) {
1338                 error = inode_setattr(ip->i_vnode, attr);
1339                 gfs2_assert_warn(ip->i_sbd, !error);
1340                 gfs2_inode_attr_out(ip);
1341                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1342                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1343                 brelse(dibh);
1344         }
1345
1346         gfs2_trans_end(ip->i_sbd);
1347
1348         return error;
1349 }
1350
1351 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1352 {
1353         struct gfs2_sbd *sdp = ip->i_sbd;
1354         struct gfs2_rgrp_list rlist;
1355         struct buffer_head *indbh, *dibh;
1356         uint64_t *eablk, *end;
1357         unsigned int rg_blocks = 0;
1358         uint64_t bstart = 0;
1359         unsigned int blen = 0;
1360         unsigned int blks = 0;
1361         unsigned int x;
1362         int error;
1363
1364         memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1365
1366         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1367                                DIO_START | DIO_WAIT, &indbh);
1368         if (error)
1369                 return error;
1370
1371         if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1372                 error = -EIO;
1373                 goto out;
1374         }
1375
1376         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1377         end = eablk + sdp->sd_inptrs;
1378
1379         for (; eablk < end; eablk++) {
1380                 uint64_t bn;
1381
1382                 if (!*eablk)
1383                         break;
1384                 bn = be64_to_cpu(*eablk);
1385
1386                 if (bstart + blen == bn)
1387                         blen++;
1388                 else {
1389                         if (bstart)
1390                                 gfs2_rlist_add(sdp, &rlist, bstart);
1391                         bstart = bn;
1392                         blen = 1;
1393                 }
1394                 blks++;
1395         }
1396         if (bstart)
1397                 gfs2_rlist_add(sdp, &rlist, bstart);
1398         else
1399                 goto out;
1400
1401         gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1402
1403         for (x = 0; x < rlist.rl_rgrps; x++) {
1404                 struct gfs2_rgrpd *rgd;
1405                 rgd = get_gl2rgd(rlist.rl_ghs[x].gh_gl);
1406                 rg_blocks += rgd->rd_ri.ri_length;
1407         }
1408
1409         error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1410         if (error)
1411                 goto out_rlist_free;
1412
1413         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1414                                  RES_INDIRECT + RES_STATFS +
1415                                  RES_QUOTA, blks);
1416         if (error)
1417                 goto out_gunlock;
1418
1419         gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1420
1421         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1422         bstart = 0;
1423         blen = 0;
1424
1425         for (; eablk < end; eablk++) {
1426                 uint64_t bn;
1427
1428                 if (!*eablk)
1429                         break;
1430                 bn = be64_to_cpu(*eablk);
1431
1432                 if (bstart + blen == bn)
1433                         blen++;
1434                 else {
1435                         if (bstart)
1436                                 gfs2_free_meta(ip, bstart, blen);
1437                         bstart = bn;
1438                         blen = 1;
1439                 }
1440
1441                 *eablk = 0;
1442                 if (!ip->i_di.di_blocks)
1443                         gfs2_consist_inode(ip);
1444                 ip->i_di.di_blocks--;
1445         }
1446         if (bstart)
1447                 gfs2_free_meta(ip, bstart, blen);
1448
1449         ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1450
1451         error = gfs2_meta_inode_buffer(ip, &dibh);
1452         if (!error) {
1453                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1454                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1455                 brelse(dibh);
1456         }
1457
1458         gfs2_trans_end(sdp);
1459
1460  out_gunlock:
1461         gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1462
1463  out_rlist_free:
1464         gfs2_rlist_free(&rlist);
1465
1466  out:
1467         brelse(indbh);
1468
1469         return error;
1470 }
1471
1472 static int ea_dealloc_block(struct gfs2_inode *ip)
1473 {
1474         struct gfs2_sbd *sdp = ip->i_sbd;
1475         struct gfs2_alloc *al = &ip->i_alloc;
1476         struct gfs2_rgrpd *rgd;
1477         struct buffer_head *dibh;
1478         int error;
1479
1480         rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1481         if (!rgd) {
1482                 gfs2_consist_inode(ip);
1483                 return -EIO;
1484         }
1485
1486         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1487                                    &al->al_rgd_gh);
1488         if (error)
1489                 return error;
1490
1491         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1492                                  RES_STATFS + RES_QUOTA, 1);
1493         if (error)
1494                 goto out_gunlock;
1495
1496         gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1497
1498         ip->i_di.di_eattr = 0;
1499         if (!ip->i_di.di_blocks)
1500                 gfs2_consist_inode(ip);
1501         ip->i_di.di_blocks--;
1502
1503         error = gfs2_meta_inode_buffer(ip, &dibh);
1504         if (!error) {
1505                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1506                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1507                 brelse(dibh);
1508         }
1509
1510         gfs2_trans_end(sdp);
1511
1512  out_gunlock:
1513         gfs2_glock_dq_uninit(&al->al_rgd_gh);
1514
1515         return error;
1516 }
1517
1518 /**
1519  * gfs2_ea_dealloc - deallocate the extended attribute fork
1520  * @ip: the inode
1521  *
1522  * Returns: errno
1523  */
1524
1525 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1526 {
1527         struct gfs2_alloc *al;
1528         int error;
1529
1530         al = gfs2_alloc_get(ip);
1531
1532         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1533         if (error)
1534                 goto out_alloc;
1535
1536         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1537         if (error)
1538                 goto out_quota;
1539
1540         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1541         if (error)
1542                 goto out_rindex;
1543
1544         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1545                 error = ea_dealloc_indirect(ip);
1546                 if (error)
1547                         goto out_rindex;
1548         }
1549
1550         error = ea_dealloc_block(ip);
1551
1552  out_rindex:
1553         gfs2_glock_dq_uninit(&al->al_ri_gh);
1554
1555  out_quota:
1556         gfs2_quota_unhold(ip);
1557
1558  out_alloc:
1559         gfs2_alloc_put(ip);
1560
1561         return error;
1562 }
1563