err.no Git - linux-2.6/blob - fs/gfs2/eattr.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License 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                 switch (ea->ea_type) {
 385                 case GFS2_EATYPE_USR:
 386                         prefix = "user.";
 387                         l = 5;
 388                         break;
 389                 case GFS2_EATYPE_SYS:
 390                         prefix = "system.";
 391                         l = 7;
 392                         break;
 393                 case GFS2_EATYPE_SECURITY:
 394                         prefix = "security.";
 395                         l = 9;
 396                         break;
 397                 default:
 398                         break;
 399                 }
 400
 401                 memcpy(er->er_data + ei->ei_size,
 402                        prefix, l);
 403                 memcpy(er->er_data + ei->ei_size + l,
 404                        GFS2_EA2NAME(ea),
 405                        ea->ea_name_len);
 406                 memcpy(er->er_data + ei->ei_size +
 407                        ea_size - 1,
 408                        &c, 1);
 409         }
 410
 411         ei->ei_size += ea_size;
 412
 413         return 0;
 414 }
 415
 416 /**
 417  * gfs2_ea_list -
 418  * @ip:
 419  * @er:
 420  *
 421  * Returns: actual size of data on success, -errno on error
 422  */
 423
 424 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 425 {
 426         struct gfs2_holder i_gh;
 427         int error;
 428
 429         if (!er->er_data || !er->er_data_len) {
 430                 er->er_data = NULL;
 431                 er->er_data_len = 0;
 432         }
 433
 434         error = gfs2_glock_nq_init(ip->i_gl,
 435                                   LM_ST_SHARED, LM_FLAG_ANY,
 436                                   &i_gh);
 437         if (error)
 438                 return error;
 439
 440         if (ip->i_di.di_eattr) {
 441                 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
 442
 443                 error = ea_foreach(ip, ea_list_i, &ei);
 444                 if (!error)
 445                         error = ei.ei_size;
 446         }
 447
 448         gfs2_glock_dq_uninit(&i_gh);
 449
 450         return error;
 451 }
 452
 453 /**
 454  * ea_get_unstuffed - actually copies the unstuffed data into the
 455  *                    request buffer
 456  * @ip:
 457  * @ea:
 458  * @data:
 459  *
 460  * Returns: errno
 461  */
 462
 463 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 464                             char *data)
 465 {
 466         struct gfs2_sbd *sdp = ip->i_sbd;
 467         struct buffer_head **bh;
 468         unsigned int amount = GFS2_EA_DATA_LEN(ea);
 469         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
 470         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
 471         unsigned int x;
 472         int error = 0;
 473
 474         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
 475         if (!bh)
 476                 return -ENOMEM;
 477
 478         for (x = 0; x < nptrs; x++) {
 479                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
 480                                        DIO_START, bh + x);
 481                 if (error) {
 482                         while (x--)
 483                                 brelse(bh[x]);
 484                         goto out;
 485                 }
 486                 dataptrs++;
 487         }
 488
 489         for (x = 0; x < nptrs; x++) {
 490                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
 491                 if (error) {
 492                         for (; x < nptrs; x++)
 493                                 brelse(bh[x]);
 494                         goto out;
 495                 }
 496                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
 497                         for (; x < nptrs; x++)
 498                                 brelse(bh[x]);
 499                         error = -EIO;
 500                         goto out;
 501                 }
 502
 503                 memcpy(data,
 504                        bh[x]->b_data + sizeof(struct gfs2_meta_header),
 505                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
 506
 507                 amount -= sdp->sd_jbsize;
 508                 data += sdp->sd_jbsize;
 509
 510                 brelse(bh[x]);
 511         }
 512
 513  out:
 514         kfree(bh);
 515
 516         return error;
 517 }
 518
 519 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
 520                      char *data)
 521 {
 522         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
 523                 memcpy(data,
 524                        GFS2_EA2DATA(el->el_ea),
 525                        GFS2_EA_DATA_LEN(el->el_ea));
 526                 return 0;
 527         } else
 528                 return ea_get_unstuffed(ip, el->el_ea, data);
 529 }
 530
 531 /**
 532  * gfs2_ea_get_i -
 533  * @ip:
 534  * @er:
 535  *
 536  * Returns: actual size of data on success, -errno on error
 537  */
 538
 539 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 540 {
 541         struct gfs2_ea_location el;
 542         int error;
 543
 544         if (!ip->i_di.di_eattr)
 545                 return -ENODATA;
 546
 547         error = gfs2_ea_find(ip, er, &el);
 548         if (error)
 549                 return error;
 550         if (!el.el_ea)
 551                 return -ENODATA;
 552
 553         if (er->er_data_len) {
 554                 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
 555                         error =  -ERANGE;
 556                 else
 557                         error = gfs2_ea_get_copy(ip, &el, er->er_data);
 558         }
 559         if (!error)
 560                 error = GFS2_EA_DATA_LEN(el.el_ea);
 561
 562         brelse(el.el_bh);
 563
 564         return error;
 565 }
 566
 567 /**
 568  * gfs2_ea_get -
 569  * @ip:
 570  * @er:
 571  *
 572  * Returns: actual size of data on success, -errno on error
 573  */
 574
 575 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 576 {
 577         struct gfs2_holder i_gh;
 578         int error;
 579
 580         if (!er->er_name_len ||
 581             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
 582                 return -EINVAL;
 583         if (!er->er_data || !er->er_data_len) {
 584                 er->er_data = NULL;
 585                 er->er_data_len = 0;
 586         }
 587
 588         error = gfs2_glock_nq_init(ip->i_gl,
 589                                   LM_ST_SHARED, LM_FLAG_ANY,
 590                                   &i_gh);
 591         if (error)
 592                 return error;
 593
 594         error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
 595
 596         gfs2_glock_dq_uninit(&i_gh);
 597
 598         return error;
 599 }
 600
 601 /**
 602  * ea_alloc_blk - allocates a new block for extended attributes.
 603  * @ip: A pointer to the inode that's getting extended attributes
 604  * @bhp:
 605  *
 606  * Returns: errno
 607  */
 608
 609 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
 610 {
 611         struct gfs2_sbd *sdp = ip->i_sbd;
 612         struct gfs2_ea_header *ea;
 613         uint64_t block;
 614
 615         block = gfs2_alloc_meta(ip);
 616
 617         *bhp = gfs2_meta_new(ip->i_gl, block);
 618         gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
 619         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
 620         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
 621
 622         ea = GFS2_EA_BH2FIRST(*bhp);
 623         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
 624         ea->ea_type = GFS2_EATYPE_UNUSED;
 625         ea->ea_flags = GFS2_EAFLAG_LAST;
 626         ea->ea_num_ptrs = 0;
 627
 628         ip->i_di.di_blocks++;
 629
 630         return 0;
 631 }
 632
 633 /**
 634  * ea_write - writes the request info to an ea, creating new blocks if
 635  *            necessary
 636  * @ip:  inode that is being modified
 637  * @ea:  the location of the new ea in a block
 638  * @er: the write request
 639  *
 640  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
 641  *
 642  * returns : errno
 643  */
 644
 645 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 646                     struct gfs2_ea_request *er)
 647 {
 648         struct gfs2_sbd *sdp = ip->i_sbd;
 649
 650         ea->ea_data_len = cpu_to_be32(er->er_data_len);
 651         ea->ea_name_len = er->er_name_len;
 652         ea->ea_type = er->er_type;
 653         ea->__pad = 0;
 654
 655         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
 656
 657         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
 658                 ea->ea_num_ptrs = 0;
 659                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
 660         } else {
 661                 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
 662                 const char *data = er->er_data;
 663                 unsigned int data_len = er->er_data_len;
 664                 unsigned int copy;
 665                 unsigned int x;
 666
 667                 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
 668                 for (x = 0; x < ea->ea_num_ptrs; x++) {
 669                         struct buffer_head *bh;
 670                         uint64_t block;
 671                         int mh_size = sizeof(struct gfs2_meta_header);
 672
 673                         block = gfs2_alloc_meta(ip);
 674
 675                         bh = gfs2_meta_new(ip->i_gl, block);
 676                         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 677                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
 678
 679                         ip->i_di.di_blocks++;
 680
 681                         copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
 682                                                              data_len;
 683                         memcpy(bh->b_data + mh_size, data, copy);
 684                         if (copy < sdp->sd_jbsize)
 685                                 memset(bh->b_data + mh_size + copy, 0,
 686                                        sdp->sd_jbsize - copy);
 687
 688                         *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
 689                         data += copy;
 690                         data_len -= copy;
 691
 692                         brelse(bh);
 693                 }
 694
 695                 gfs2_assert_withdraw(sdp, !data_len);
 696         }
 697
 698         return 0;
 699 }
 700
 701 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
 702                                    struct gfs2_ea_request *er,
 703                                    void *private);
 704
 705 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 706                              unsigned int blks,
 707                              ea_skeleton_call_t skeleton_call,
 708                              void *private)
 709 {
 710         struct gfs2_alloc *al;
 711         struct buffer_head *dibh;
 712         int error;
 713
 714         al = gfs2_alloc_get(ip);
 715
 716         error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 717         if (error)
 718                 goto out;
 719
 720         error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
 721         if (error)
 722                 goto out_gunlock_q;
 723
 724         al->al_requested = blks;
 725
 726         error = gfs2_inplace_reserve(ip);
 727         if (error)
 728                 goto out_gunlock_q;
 729
 730         error = gfs2_trans_begin(ip->i_sbd,
 731                                  blks + al->al_rgd->rd_ri.ri_length +
 732                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
 733         if (error)
 734                 goto out_ipres;
 735
 736         error = skeleton_call(ip, er, private);
 737         if (error)
 738                 goto out_end_trans;
 739
 740         error = gfs2_meta_inode_buffer(ip, &dibh);
 741         if (!error) {
 742                 if (er->er_flags & GFS2_ERF_MODE) {
 743                         gfs2_assert_withdraw(ip->i_sbd,
 744                                             (ip->i_di.di_mode & S_IFMT) ==
 745                                             (er->er_mode & S_IFMT));
 746                         ip->i_di.di_mode = er->er_mode;
 747                 }
 748                 ip->i_di.di_ctime = get_seconds();
 749                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 750                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
 751                 brelse(dibh);
 752         }
 753
 754  out_end_trans:
 755         gfs2_trans_end(ip->i_sbd);
 756
 757  out_ipres:
 758         gfs2_inplace_release(ip);
 759
 760  out_gunlock_q:
 761         gfs2_quota_unlock(ip);
 762
 763  out:
 764         gfs2_alloc_put(ip);
 765
 766         return error;
 767 }
 768
 769 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 770                      void *private)
 771 {
 772         struct buffer_head *bh;
 773         int error;
 774
 775         error = ea_alloc_blk(ip, &bh);
 776         if (error)
 777                 return error;
 778
 779         ip->i_di.di_eattr = bh->b_blocknr;
 780         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
 781
 782         brelse(bh);
 783
 784         return error;
 785 }
 786
 787 /**
 788  * ea_init - initializes a new eattr block
 789  * @ip:
 790  * @er:
 791  *
 792  * Returns: errno
 793  */
 794
 795 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 796 {
 797         unsigned int jbsize = ip->i_sbd->sd_jbsize;
 798         unsigned int blks = 1;
 799
 800         if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
 801                 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
 802
 803         return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
 804 }
 805
 806 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
 807 {
 808         uint32_t ea_size = GFS2_EA_SIZE(ea);
 809         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
 810                                      ea_size);
 811         uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
 812         int last = ea->ea_flags & GFS2_EAFLAG_LAST;
 813
 814         ea->ea_rec_len = cpu_to_be32(ea_size);
 815         ea->ea_flags ^= last;
 816
 817         new->ea_rec_len = cpu_to_be32(new_size);
 818         new->ea_flags = last;
 819
 820         return new;
 821 }
 822
 823 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
 824                                   struct gfs2_ea_location *el)
 825 {
 826         struct gfs2_ea_header *ea = el->el_ea;
 827         struct gfs2_ea_header *prev = el->el_prev;
 828         uint32_t len;
 829
 830         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
 831
 832         if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
 833                 ea->ea_type = GFS2_EATYPE_UNUSED;
 834                 return;
 835         } else if (GFS2_EA2NEXT(prev) != ea) {
 836                 prev = GFS2_EA2NEXT(prev);
 837                 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
 838         }
 839
 840         len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 841         prev->ea_rec_len = cpu_to_be32(len);
 842
 843         if (GFS2_EA_IS_LAST(ea))
 844                 prev->ea_flags |= GFS2_EAFLAG_LAST;
 845 }
 846
 847 struct ea_set {
 848         int ea_split;
 849
 850         struct gfs2_ea_request *es_er;
 851         struct gfs2_ea_location *es_el;
 852
 853         struct buffer_head *es_bh;
 854         struct gfs2_ea_header *es_ea;
 855 };
 856
 857 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
 858                                  struct gfs2_ea_header *ea, struct ea_set *es)
 859 {
 860         struct gfs2_ea_request *er = es->es_er;
 861         struct buffer_head *dibh;
 862         int error;
 863
 864         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
 865         if (error)
 866                 return error;
 867
 868         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 869
 870         if (es->ea_split)
 871                 ea = ea_split_ea(ea);
 872
 873         ea_write(ip, ea, er);
 874
 875         if (es->es_el)
 876                 ea_set_remove_stuffed(ip, es->es_el);
 877
 878         error = gfs2_meta_inode_buffer(ip, &dibh);
 879         if (error)
 880                 goto out;
 881
 882         if (er->er_flags & GFS2_ERF_MODE) {
 883                 gfs2_assert_withdraw(ip->i_sbd,
 884                         (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
 885                 ip->i_di.di_mode = er->er_mode;
 886         }
 887         ip->i_di.di_ctime = get_seconds();
 888         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 889         gfs2_dinode_out(&ip->i_di, dibh->b_data);
 890         brelse(dibh);
 891  out:
 892         gfs2_trans_end(ip->i_sbd);
 893
 894         return error;
 895 }
 896
 897 static int ea_set_simple_alloc(struct gfs2_inode *ip,
 898                                struct gfs2_ea_request *er, void *private)
 899 {
 900         struct ea_set *es = private;
 901         struct gfs2_ea_header *ea = es->es_ea;
 902         int error;
 903
 904         gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
 905
 906         if (es->ea_split)
 907                 ea = ea_split_ea(ea);
 908
 909         error = ea_write(ip, ea, er);
 910         if (error)
 911                 return error;
 912
 913         if (es->es_el)
 914                 ea_set_remove_stuffed(ip, es->es_el);
 915
 916         return 0;
 917 }
 918
 919 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
 920                          struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 921                          void *private)
 922 {
 923         struct ea_set *es = private;
 924         unsigned int size;
 925         int stuffed;
 926         int error;
 927
 928         stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size);
 929
 930         if (ea->ea_type == GFS2_EATYPE_UNUSED) {
 931                 if (GFS2_EA_REC_LEN(ea) < size)
 932                         return 0;
 933                 if (!GFS2_EA_IS_STUFFED(ea)) {
 934                         error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
 935                         if (error)
 936                                 return error;
 937                 }
 938                 es->ea_split = 0;
 939         } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
 940                 es->ea_split = 1;
 941         else
 942                 return 0;
 943
 944         if (stuffed) {
 945                 error = ea_set_simple_noalloc(ip, bh, ea, es);
 946                 if (error)
 947                         return error;
 948         } else {
 949                 unsigned int blks;
 950
 951                 es->es_bh = bh;
 952                 es->es_ea = ea;
 953                 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
 954                                         ip->i_sbd->sd_jbsize);
 955
 956                 error = ea_alloc_skeleton(ip, es->es_er, blks,
 957                                           ea_set_simple_alloc, es);
 958                 if (error)
 959                         return error;
 960         }
 961
 962         return 1;
 963 }
 964
 965 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 966                         void *private)
 967 {
 968         struct gfs2_sbd *sdp = ip->i_sbd;
 969         struct buffer_head *indbh, *newbh;
 970         uint64_t *eablk;
 971         int error;
 972         int mh_size = sizeof(struct gfs2_meta_header);
 973
 974         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
 975                 uint64_t *end;
 976
 977                 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
 978                                        DIO_START | DIO_WAIT, &indbh);
 979                 if (error)
 980                         return error;
 981
 982                 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
 983                         error = -EIO;
 984                         goto out;
 985                 }
 986
 987                 eablk = (uint64_t *)(indbh->b_data + mh_size);
 988                 end = eablk + sdp->sd_inptrs;
 989
 990                 for (; eablk < end; eablk++)
 991                         if (!*eablk)
 992                                 break;
 993
 994                 if (eablk == end) {
 995                         error = -ENOSPC;
 996                         goto out;
 997                 }
 998
 999                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1000         } else {
1001                 uint64_t blk;
1002
1003                 blk = gfs2_alloc_meta(ip);
1004
1005                 indbh = gfs2_meta_new(ip->i_gl, blk);
1006                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1007                 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1008                 gfs2_buffer_clear_tail(indbh, mh_size);
1009
1010                 eablk = (uint64_t *)(indbh->b_data + mh_size);
1011                 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1012                 ip->i_di.di_eattr = blk;
1013                 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1014                 ip->i_di.di_blocks++;
1015
1016                 eablk++;
1017         }
1018
1019         error = ea_alloc_blk(ip, &newbh);
1020         if (error)
1021                 goto out;
1022
1023         *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1024         error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1025         brelse(newbh);
1026         if (error)
1027                 goto out;
1028
1029         if (private)
1030                 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1031
1032  out:
1033         brelse(indbh);
1034
1035         return error;
1036 }
1037
1038 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1039                     struct gfs2_ea_location *el)
1040 {
1041         struct ea_set es;
1042         unsigned int blks = 2;
1043         int error;
1044
1045         memset(&es, 0, sizeof(struct ea_set));
1046         es.es_er = er;
1047         es.es_el = el;
1048
1049         error = ea_foreach(ip, ea_set_simple, &es);
1050         if (error > 0)
1051                 return 0;
1052         if (error)
1053                 return error;
1054
1055         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1056                 blks++;
1057         if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
1058                 blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize);
1059
1060         return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1061 }
1062
1063 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1064                                    struct gfs2_ea_location *el)
1065 {
1066         if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1067                 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1068                 gfs2_assert_withdraw(ip->i_sbd,
1069                                      GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1070         }
1071
1072         return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1073 }
1074
1075 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1076 {
1077         struct gfs2_ea_location el;
1078         int error;
1079
1080         if (!ip->i_di.di_eattr) {
1081                 if (er->er_flags & XATTR_REPLACE)
1082                         return -ENODATA;
1083                 return ea_init(ip, er);
1084         }
1085
1086         error = gfs2_ea_find(ip, er, &el);
1087         if (error)
1088                 return error;
1089
1090         if (el.el_ea) {
1091                 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1092                         brelse(el.el_bh);
1093                         return -EPERM;
1094                 }
1095
1096                 error = -EEXIST;
1097                 if (!(er->er_flags & XATTR_CREATE)) {
1098                         int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1099                         error = ea_set_i(ip, er, &el);
1100                         if (!error && unstuffed)
1101                                 ea_set_remove_unstuffed(ip, &el);
1102                 }
1103
1104                 brelse(el.el_bh);
1105         } else {
1106                 error = -ENODATA;
1107                 if (!(er->er_flags & XATTR_REPLACE))
1108                         error = ea_set_i(ip, er, NULL);
1109         }
1110
1111         return error;
1112 }
1113
1114 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1115 {
1116         struct gfs2_holder i_gh;
1117         int error;
1118
1119         if (!er->er_name_len ||
1120             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1121                 return -EINVAL;
1122         if (!er->er_data || !er->er_data_len) {
1123                 er->er_data = NULL;
1124                 er->er_data_len = 0;
1125         }
1126         error = ea_check_size(ip->i_sbd, er);
1127         if (error)
1128                 return error;
1129
1130         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1131         if (error)
1132                 return error;
1133
1134         if (IS_IMMUTABLE(ip->i_vnode))
1135                 error = -EPERM;
1136         else
1137                 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1138
1139         gfs2_glock_dq_uninit(&i_gh);
1140
1141         return error;
1142 }
1143
1144 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1145 {
1146         struct gfs2_ea_header *ea = el->el_ea;
1147         struct gfs2_ea_header *prev = el->el_prev;
1148         struct buffer_head *dibh;
1149         int error;
1150
1151         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1152         if (error)
1153                 return error;
1154
1155         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1156
1157         if (prev) {
1158                 uint32_t len;
1159
1160                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1161                 prev->ea_rec_len = cpu_to_be32(len);
1162
1163                 if (GFS2_EA_IS_LAST(ea))
1164                         prev->ea_flags |= GFS2_EAFLAG_LAST;
1165         } else
1166                 ea->ea_type = GFS2_EATYPE_UNUSED;
1167
1168         error = gfs2_meta_inode_buffer(ip, &dibh);
1169         if (!error) {
1170                 ip->i_di.di_ctime = get_seconds();
1171                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1172                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1173                 brelse(dibh);
1174         }
1175
1176         gfs2_trans_end(ip->i_sbd);
1177
1178         return error;
1179 }
1180
1181 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1182 {
1183         struct gfs2_ea_location el;
1184         int error;
1185
1186         if (!ip->i_di.di_eattr)
1187                 return -ENODATA;
1188
1189         error = gfs2_ea_find(ip, er, &el);
1190         if (error)
1191                 return error;
1192         if (!el.el_ea)
1193                 return -ENODATA;
1194
1195         if (GFS2_EA_IS_STUFFED(el.el_ea))
1196                 error = ea_remove_stuffed(ip, &el);
1197         else
1198                 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1199                                             0);
1200
1201         brelse(el.el_bh);
1202
1203         return error;
1204 }
1205
1206 /**
1207  * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1208  * @ip: pointer to the inode of the target file
1209  * @er: request information
1210  *
1211  * Returns: errno
1212  */
1213
1214 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1215 {
1216         struct gfs2_holder i_gh;
1217         int error;
1218
1219         if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1220                 return -EINVAL;
1221
1222         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1223         if (error)
1224                 return error;
1225
1226         if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1227                 error = -EPERM;
1228         else
1229                 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1230
1231         gfs2_glock_dq_uninit(&i_gh);
1232
1233         return error;
1234 }
1235
1236 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1237                                   struct gfs2_ea_header *ea, char *data)
1238 {
1239         struct gfs2_sbd *sdp = ip->i_sbd;
1240         struct buffer_head **bh;
1241         unsigned int amount = GFS2_EA_DATA_LEN(ea);
1242         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1243         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1244         unsigned int x;
1245         int error;
1246
1247         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1248         if (!bh)
1249                 return -ENOMEM;
1250
1251         error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1252         if (error)
1253                 goto out;
1254
1255         for (x = 0; x < nptrs; x++) {
1256                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1257                                        DIO_START, bh + x);
1258                 if (error) {
1259                         while (x--)
1260                                 brelse(bh[x]);
1261                         goto fail;
1262                 }
1263                 dataptrs++;
1264         }
1265
1266         for (x = 0; x < nptrs; x++) {
1267                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1268                 if (error) {
1269                         for (; x < nptrs; x++)
1270                                 brelse(bh[x]);
1271                         goto fail;
1272                 }
1273                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1274                         for (; x < nptrs; x++)
1275                                 brelse(bh[x]);
1276                         error = -EIO;
1277                         goto fail;
1278                 }
1279
1280                 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1281
1282                 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1283                        data,
1284                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1285
1286                 amount -= sdp->sd_jbsize;
1287                 data += sdp->sd_jbsize;
1288
1289                 brelse(bh[x]);
1290         }
1291
1292  out:
1293         kfree(bh);
1294
1295         return error;
1296
1297  fail:
1298         gfs2_trans_end(sdp);
1299         kfree(bh);
1300
1301         return error;
1302 }
1303
1304 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1305                       struct iattr *attr, char *data)
1306 {
1307         struct buffer_head *dibh;
1308         int error;
1309
1310         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1311                 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1312                 if (error)
1313                         return error;
1314
1315                 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1316                 memcpy(GFS2_EA2DATA(el->el_ea),
1317                        data,
1318                        GFS2_EA_DATA_LEN(el->el_ea));
1319         } else
1320                 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1321
1322         if (error)
1323                 return error;
1324
1325         error = gfs2_meta_inode_buffer(ip, &dibh);
1326         if (!error) {
1327                 error = inode_setattr(ip->i_vnode, attr);
1328                 gfs2_assert_warn(ip->i_sbd, !error);
1329                 gfs2_inode_attr_out(ip);
1330                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1331                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1332                 brelse(dibh);
1333         }
1334
1335         gfs2_trans_end(ip->i_sbd);
1336
1337         return error;
1338 }
1339
1340 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1341 {
1342         struct gfs2_sbd *sdp = ip->i_sbd;
1343         struct gfs2_rgrp_list rlist;
1344         struct buffer_head *indbh, *dibh;
1345         uint64_t *eablk, *end;
1346         unsigned int rg_blocks = 0;
1347         uint64_t bstart = 0;
1348         unsigned int blen = 0;
1349         unsigned int blks = 0;
1350         unsigned int x;
1351         int error;
1352
1353         memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1354
1355         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1356                                DIO_START | DIO_WAIT, &indbh);
1357         if (error)
1358                 return error;
1359
1360         if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1361                 error = -EIO;
1362                 goto out;
1363         }
1364
1365         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1366         end = eablk + sdp->sd_inptrs;
1367
1368         for (; eablk < end; eablk++) {
1369                 uint64_t bn;
1370
1371                 if (!*eablk)
1372                         break;
1373                 bn = be64_to_cpu(*eablk);
1374
1375                 if (bstart + blen == bn)
1376                         blen++;
1377                 else {
1378                         if (bstart)
1379                                 gfs2_rlist_add(sdp, &rlist, bstart);
1380                         bstart = bn;
1381                         blen = 1;
1382                 }
1383                 blks++;
1384         }
1385         if (bstart)
1386                 gfs2_rlist_add(sdp, &rlist, bstart);
1387         else
1388                 goto out;
1389
1390         gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1391
1392         for (x = 0; x < rlist.rl_rgrps; x++) {
1393                 struct gfs2_rgrpd *rgd;
1394                 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1395                 rg_blocks += rgd->rd_ri.ri_length;
1396         }
1397
1398         error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1399         if (error)
1400                 goto out_rlist_free;
1401
1402         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1403                                  RES_INDIRECT + RES_STATFS +
1404                                  RES_QUOTA, blks);
1405         if (error)
1406                 goto out_gunlock;
1407
1408         gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1409
1410         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1411         bstart = 0;
1412         blen = 0;
1413
1414         for (; eablk < end; eablk++) {
1415                 uint64_t bn;
1416
1417                 if (!*eablk)
1418                         break;
1419                 bn = be64_to_cpu(*eablk);
1420
1421                 if (bstart + blen == bn)
1422                         blen++;
1423                 else {
1424                         if (bstart)
1425                                 gfs2_free_meta(ip, bstart, blen);
1426                         bstart = bn;
1427                         blen = 1;
1428                 }
1429
1430                 *eablk = 0;
1431                 if (!ip->i_di.di_blocks)
1432                         gfs2_consist_inode(ip);
1433                 ip->i_di.di_blocks--;
1434         }
1435         if (bstart)
1436                 gfs2_free_meta(ip, bstart, blen);
1437
1438         ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1439
1440         error = gfs2_meta_inode_buffer(ip, &dibh);
1441         if (!error) {
1442                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1443                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1444                 brelse(dibh);
1445         }
1446
1447         gfs2_trans_end(sdp);
1448
1449  out_gunlock:
1450         gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1451
1452  out_rlist_free:
1453         gfs2_rlist_free(&rlist);
1454
1455  out:
1456         brelse(indbh);
1457
1458         return error;
1459 }
1460
1461 static int ea_dealloc_block(struct gfs2_inode *ip)
1462 {
1463         struct gfs2_sbd *sdp = ip->i_sbd;
1464         struct gfs2_alloc *al = &ip->i_alloc;
1465         struct gfs2_rgrpd *rgd;
1466         struct buffer_head *dibh;
1467         int error;
1468
1469         rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1470         if (!rgd) {
1471                 gfs2_consist_inode(ip);
1472                 return -EIO;
1473         }
1474
1475         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1476                                    &al->al_rgd_gh);
1477         if (error)
1478                 return error;
1479
1480         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1481                                  RES_STATFS + RES_QUOTA, 1);
1482         if (error)
1483                 goto out_gunlock;
1484
1485         gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1486
1487         ip->i_di.di_eattr = 0;
1488         if (!ip->i_di.di_blocks)
1489                 gfs2_consist_inode(ip);
1490         ip->i_di.di_blocks--;
1491
1492         error = gfs2_meta_inode_buffer(ip, &dibh);
1493         if (!error) {
1494                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1495                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1496                 brelse(dibh);
1497         }
1498
1499         gfs2_trans_end(sdp);
1500
1501  out_gunlock:
1502         gfs2_glock_dq_uninit(&al->al_rgd_gh);
1503
1504         return error;
1505 }
1506
1507 /**
1508  * gfs2_ea_dealloc - deallocate the extended attribute fork
1509  * @ip: the inode
1510  *
1511  * Returns: errno
1512  */
1513
1514 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1515 {
1516         struct gfs2_alloc *al;
1517         int error;
1518
1519         al = gfs2_alloc_get(ip);
1520
1521         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1522         if (error)
1523                 goto out_alloc;
1524
1525         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1526         if (error)
1527                 goto out_quota;
1528
1529         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1530         if (error)
1531                 goto out_rindex;
1532
1533         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1534                 error = ea_dealloc_indirect(ip);
1535                 if (error)
1536                         goto out_rindex;
1537         }
1538
1539         error = ea_dealloc_block(ip);
1540
1541  out_rindex:
1542         gfs2_glock_dq_uninit(&al->al_ri_gh);
1543
1544  out_quota:
1545         gfs2_quota_unhold(ip);
1546
1547  out_alloc:
1548         gfs2_alloc_put(ip);
1549
1550         return error;
1551 }
1552