fs/gfs2/eattr.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License v.2.
   8  */
   9
  10 #include <linux/sched.h>
  11 #include <linux/slab.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/completion.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/xattr.h>
  16 #include <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
 359 static int gfs2_ea_repack_i(struct gfs2_inode *ip)
 360 {
 361         return -EOPNOTSUPP;
 362 }
 363
 364 int gfs2_ea_repack(struct gfs2_inode *ip)
 365 {
 366         struct gfs2_holder gh;
 367         int error;
 368
 369         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 370         if (error)
 371                 return error;
 372
 373         /* Some sort of permissions checking would be nice */
 374
 375         error = gfs2_ea_repack_i(ip);
 376
 377         gfs2_glock_dq_uninit(&gh);
 378
 379         return error;
 380 }
 381
 382 struct ea_list {
 383         struct gfs2_ea_request *ei_er;
 384         unsigned int ei_size;
 385 };
 386
 387 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
 388                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 389                      void *private)
 390 {
 391         struct ea_list *ei = private;
 392         struct gfs2_ea_request *er = ei->ei_er;
 393         unsigned int ea_size = GFS2_EA_STRLEN(ea);
 394
 395         if (ea->ea_type == GFS2_EATYPE_UNUSED)
 396                 return 0;
 397
 398         if (er->er_data_len) {
 399                 char *prefix;
 400                 unsigned int l;
 401                 char c = 0;
 402
 403                 if (ei->ei_size + ea_size > er->er_data_len)
 404                         return -ERANGE;
 405
 406                 if (ea->ea_type == GFS2_EATYPE_USR) {
 407                         prefix = "user.";
 408                         l = 5;
 409                 } else {
 410                         prefix = "system.";
 411                         l = 7;
 412                 }
 413
 414                 memcpy(er->er_data + ei->ei_size,
 415                        prefix, l);
 416                 memcpy(er->er_data + ei->ei_size + l,
 417                        GFS2_EA2NAME(ea),
 418                        ea->ea_name_len);
 419                 memcpy(er->er_data + ei->ei_size +
 420                        ea_size - 1,
 421                        &c, 1);
 422         }
 423
 424         ei->ei_size += ea_size;
 425
 426         return 0;
 427 }
 428
 429 /**
 430  * gfs2_ea_list -
 431  * @ip:
 432  * @er:
 433  *
 434  * Returns: actual size of data on success, -errno on error
 435  */
 436
 437 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 438 {
 439         struct gfs2_holder i_gh;
 440         int error;
 441
 442         if (!er->er_data || !er->er_data_len) {
 443                 er->er_data = NULL;
 444                 er->er_data_len = 0;
 445         }
 446
 447         error = gfs2_glock_nq_init(ip->i_gl,
 448                                   LM_ST_SHARED, LM_FLAG_ANY,
 449                                   &i_gh);
 450         if (error)
 451                 return error;
 452
 453         if (ip->i_di.di_eattr) {
 454                 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
 455
 456                 error = ea_foreach(ip, ea_list_i, &ei);
 457                 if (!error)
 458                         error = ei.ei_size;
 459         }
 460
 461         gfs2_glock_dq_uninit(&i_gh);
 462
 463         return error;
 464 }
 465
 466 /**
 467  * ea_get_unstuffed - actually copies the unstuffed data into the
 468  *                    request buffer
 469  * @ip:
 470  * @ea:
 471  * @data:
 472  *
 473  * Returns: errno
 474  */
 475
 476 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 477                             char *data)
 478 {
 479         struct gfs2_sbd *sdp = ip->i_sbd;
 480         struct buffer_head **bh;
 481         unsigned int amount = GFS2_EA_DATA_LEN(ea);
 482         unsigned int nptrs = DIV_RU(amount, sdp->sd_jbsize);
 483         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
 484         unsigned int x;
 485         int error = 0;
 486
 487         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
 488         if (!bh)
 489                 return -ENOMEM;
 490
 491         for (x = 0; x < nptrs; x++) {
 492                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
 493                                        DIO_START, bh + x);
 494                 if (error) {
 495                         while (x--)
 496                                 brelse(bh[x]);
 497                         goto out;
 498                 }
 499                 dataptrs++;
 500         }
 501
 502         for (x = 0; x < nptrs; x++) {
 503                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
 504                 if (error) {
 505                         for (; x < nptrs; x++)
 506                                 brelse(bh[x]);
 507                         goto out;
 508                 }
 509                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
 510                         for (; x < nptrs; x++)
 511                                 brelse(bh[x]);
 512                         error = -EIO;
 513                         goto out;
 514                 }
 515
 516                 memcpy(data,
 517                        bh[x]->b_data + sizeof(struct gfs2_meta_header),
 518                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
 519
 520                 amount -= sdp->sd_jbsize;
 521                 data += sdp->sd_jbsize;
 522
 523                 brelse(bh[x]);
 524         }
 525
 526  out:
 527         kfree(bh);
 528
 529         return error;
 530 }
 531
 532 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
 533                      char *data)
 534 {
 535         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
 536                 memcpy(data,
 537                        GFS2_EA2DATA(el->el_ea),
 538                        GFS2_EA_DATA_LEN(el->el_ea));
 539                 return 0;
 540         } else
 541                 return ea_get_unstuffed(ip, el->el_ea, data);
 542 }
 543
 544 /**
 545  * gfs2_ea_get_i -
 546  * @ip:
 547  * @er:
 548  *
 549  * Returns: actual size of data on success, -errno on error
 550  */
 551
 552 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 553 {
 554         struct gfs2_ea_location el;
 555         int error;
 556
 557         if (!ip->i_di.di_eattr)
 558                 return -ENODATA;
 559
 560         error = gfs2_ea_find(ip, er, &el);
 561         if (error)
 562                 return error;
 563         if (!el.el_ea)
 564                 return -ENODATA;
 565
 566         if (er->er_data_len) {
 567                 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
 568                         error =  -ERANGE;
 569                 else
 570                         error = gfs2_ea_get_copy(ip, &el, er->er_data);
 571         }
 572         if (!error)
 573                 error = GFS2_EA_DATA_LEN(el.el_ea);
 574
 575         brelse(el.el_bh);
 576
 577         return error;
 578 }
 579
 580 /**
 581  * gfs2_ea_get -
 582  * @ip:
 583  * @er:
 584  *
 585  * Returns: actual size of data on success, -errno on error
 586  */
 587
 588 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 589 {
 590         struct gfs2_holder i_gh;
 591         int error;
 592
 593         if (!er->er_name_len ||
 594             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
 595                 return -EINVAL;
 596         if (!er->er_data || !er->er_data_len) {
 597                 er->er_data = NULL;
 598                 er->er_data_len = 0;
 599         }
 600
 601         error = gfs2_glock_nq_init(ip->i_gl,
 602                                   LM_ST_SHARED, LM_FLAG_ANY,
 603                                   &i_gh);
 604         if (error)
 605                 return error;
 606
 607         error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
 608
 609         gfs2_glock_dq_uninit(&i_gh);
 610
 611         return error;
 612 }
 613
 614 /**
 615  * ea_alloc_blk - allocates a new block for extended attributes.
 616  * @ip: A pointer to the inode that's getting extended attributes
 617  * @bhp:
 618  *
 619  * Returns: errno
 620  */
 621
 622 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
 623 {
 624         struct gfs2_sbd *sdp = ip->i_sbd;
 625         struct gfs2_ea_header *ea;
 626         uint64_t block;
 627
 628         block = gfs2_alloc_meta(ip);
 629
 630         *bhp = gfs2_meta_new(ip->i_gl, block);
 631         gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
 632         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
 633         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
 634
 635         ea = GFS2_EA_BH2FIRST(*bhp);
 636         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
 637         ea->ea_type = GFS2_EATYPE_UNUSED;
 638         ea->ea_flags = GFS2_EAFLAG_LAST;
 639         ea->ea_num_ptrs = 0;
 640
 641         ip->i_di.di_blocks++;
 642
 643         return 0;
 644 }
 645
 646 /**
 647  * ea_write - writes the request info to an ea, creating new blocks if
 648  *            necessary
 649  * @ip:  inode that is being modified
 650  * @ea:  the location of the new ea in a block
 651  * @er: the write request
 652  *
 653  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
 654  *
 655  * returns : errno
 656  */
 657
 658 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 659                     struct gfs2_ea_request *er)
 660 {
 661         struct gfs2_sbd *sdp = ip->i_sbd;
 662
 663         ea->ea_data_len = cpu_to_be32(er->er_data_len);
 664         ea->ea_name_len = er->er_name_len;
 665         ea->ea_type = er->er_type;
 666         ea->__pad = 0;
 667
 668         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
 669
 670         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
 671                 ea->ea_num_ptrs = 0;
 672                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
 673         } else {
 674                 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
 675                 const char *data = er->er_data;
 676                 unsigned int data_len = er->er_data_len;
 677                 unsigned int copy;
 678                 unsigned int x;
 679
 680                 ea->ea_num_ptrs = DIV_RU(er->er_data_len, sdp->sd_jbsize);
 681                 for (x = 0; x < ea->ea_num_ptrs; x++) {
 682                         struct buffer_head *bh;
 683                         uint64_t block;
 684                         int mh_size = sizeof(struct gfs2_meta_header);
 685
 686                         block = gfs2_alloc_meta(ip);
 687
 688                         bh = gfs2_meta_new(ip->i_gl, block);
 689                         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 690                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
 691
 692                         ip->i_di.di_blocks++;
 693
 694                         copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
 695                                                              data_len;
 696                         memcpy(bh->b_data + mh_size, data, copy);
 697                         if (copy < sdp->sd_jbsize)
 698                                 memset(bh->b_data + mh_size + copy, 0,
 699                                        sdp->sd_jbsize - copy);
 700
 701                         *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
 702                         data += copy;
 703                         data_len -= copy;
 704
 705                         brelse(bh);
 706                 }
 707
 708                 gfs2_assert_withdraw(sdp, !data_len);
 709         }
 710
 711         return 0;
 712 }
 713
 714 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
 715                                    struct gfs2_ea_request *er,
 716                                    void *private);
 717
 718 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 719                              unsigned int blks,
 720                              ea_skeleton_call_t skeleton_call,
 721                              void *private)
 722 {
 723         struct gfs2_alloc *al;
 724         struct buffer_head *dibh;
 725         int error;
 726
 727         al = gfs2_alloc_get(ip);
 728
 729         error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 730         if (error)
 731                 goto out;
 732
 733         error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
 734         if (error)
 735                 goto out_gunlock_q;
 736
 737         al->al_requested = blks;
 738
 739         error = gfs2_inplace_reserve(ip);
 740         if (error)
 741                 goto out_gunlock_q;
 742
 743         error = gfs2_trans_begin(ip->i_sbd,
 744                                  blks + al->al_rgd->rd_ri.ri_length +
 745                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
 746         if (error)
 747                 goto out_ipres;
 748
 749         error = skeleton_call(ip, er, private);
 750         if (error)
 751                 goto out_end_trans;
 752
 753         error = gfs2_meta_inode_buffer(ip, &dibh);
 754         if (!error) {
 755                 if (er->er_flags & GFS2_ERF_MODE) {
 756                         gfs2_assert_withdraw(ip->i_sbd,
 757                                             (ip->i_di.di_mode & S_IFMT) ==
 758                                             (er->er_mode & S_IFMT));
 759                         ip->i_di.di_mode = er->er_mode;
 760                 }
 761                 ip->i_di.di_ctime = get_seconds();
 762                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 763                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
 764                 brelse(dibh);
 765         }
 766
 767  out_end_trans:
 768         gfs2_trans_end(ip->i_sbd);
 769
 770  out_ipres:
 771         gfs2_inplace_release(ip);
 772
 773  out_gunlock_q:
 774         gfs2_quota_unlock(ip);
 775
 776  out:
 777         gfs2_alloc_put(ip);
 778
 779         return error;
 780 }
 781
 782 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 783                      void *private)
 784 {
 785         struct buffer_head *bh;
 786         int error;
 787
 788         error = ea_alloc_blk(ip, &bh);
 789         if (error)
 790                 return error;
 791
 792         ip->i_di.di_eattr = bh->b_blocknr;
 793         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
 794
 795         brelse(bh);
 796
 797         return error;
 798 }
 799
 800 /**
 801  * ea_init - initializes a new eattr block
 802  * @ip:
 803  * @er:
 804  *
 805  * Returns: errno
 806  */
 807
 808 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 809 {
 810         unsigned int jbsize = ip->i_sbd->sd_jbsize;
 811         unsigned int blks = 1;
 812
 813         if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
 814                 blks += DIV_RU(er->er_data_len, jbsize);
 815
 816         return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
 817 }
 818
 819 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
 820 {
 821         uint32_t ea_size = GFS2_EA_SIZE(ea);
 822         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea + 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