git.oblomov.eu Git - linux-2.6/blob - fs/gfs2/eattr.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License v.2.
   8  */
   9
  10 #include <linux/sched.h>
  11 #include <linux/slab.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/completion.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/xattr.h>
  16 #include <linux/gfs2_ondisk.h>
  17 #include <asm/semaphore.h>
  18 #include <asm/uaccess.h>
  19
  20 #include "gfs2.h"
  21 #include "lm_interface.h"
  22 #include "incore.h"
  23 #include "acl.h"
  24 #include "eaops.h"
  25 #include "eattr.h"
  26 #include "glock.h"
  27 #include "inode.h"
  28 #include "meta_io.h"
  29 #include "quota.h"
  30 #include "rgrp.h"
  31 #include "trans.h"
  32 #include "util.h"
  33
  34 /**
  35  * ea_calc_size - returns the acutal number of bytes the request will take up
  36  *                (not counting any unstuffed data blocks)
  37  * @sdp:
  38  * @er:
  39  * @size:
  40  *
  41  * Returns: 1 if the EA should be stuffed
  42  */
  43
  44 static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
  45                         unsigned int *size)
  46 {
  47         *size = GFS2_EAREQ_SIZE_STUFFED(er);
  48         if (*size <= sdp->sd_jbsize)
  49                 return 1;
  50
  51         *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
  52
  53         return 0;
  54 }
  55
  56 static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
  57 {
  58         unsigned int size;
  59
  60         if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
  61                 return -ERANGE;
  62
  63         ea_calc_size(sdp, er, &size);
  64
  65         /* This can only happen with 512 byte blocks */
  66         if (size > sdp->sd_jbsize)
  67                 return -ERANGE;
  68
  69         return 0;
  70 }
  71
  72 typedef int (*ea_call_t) (struct gfs2_inode *ip,
  73                           struct buffer_head *bh,
  74                           struct gfs2_ea_header *ea,
  75                           struct gfs2_ea_header *prev,
  76                           void *private);
  77
  78 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
  79                         ea_call_t ea_call, void *data)
  80 {
  81         struct gfs2_ea_header *ea, *prev = NULL;
  82         int error = 0;
  83
  84         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA))
  85                 return -EIO;
  86
  87         for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
  88                 if (!GFS2_EA_REC_LEN(ea))
  89                         goto fail;
  90                 if (!(bh->b_data <= (char *)ea &&
  91                       (char *)GFS2_EA2NEXT(ea) <=
  92                       bh->b_data + bh->b_size))
  93                         goto fail;
  94                 if (!GFS2_EATYPE_VALID(ea->ea_type))
  95                         goto fail;
  96
  97                 error = ea_call(ip, bh, ea, prev, data);
  98                 if (error)
  99                         return error;
 100
 101                 if (GFS2_EA_IS_LAST(ea)) {
 102                         if ((char *)GFS2_EA2NEXT(ea) !=
 103                             bh->b_data + bh->b_size)
 104                                 goto fail;
 105                         break;
 106                 }
 107         }
 108
 109         return error;
 110
 111  fail:
 112         gfs2_consist_inode(ip);
 113         return -EIO;
 114 }
 115
 116 static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
 117 {
 118         struct buffer_head *bh, *eabh;
 119         uint64_t *eablk, *end;
 120         int error;
 121
 122         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
 123                                DIO_START | DIO_WAIT, &bh);
 124         if (error)
 125                 return error;
 126
 127         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
 128                 error = ea_foreach_i(ip, bh, ea_call, data);
 129                 goto out;
 130         }
 131
 132         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
 133                 error = -EIO;
 134                 goto out;
 135         }
 136
 137         eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
 138         end = eablk + ip->i_sbd->sd_inptrs;
 139
 140         for (; eablk < end; eablk++) {
 141                 uint64_t bn;
 142
 143                 if (!*eablk)
 144                         break;
 145                 bn = be64_to_cpu(*eablk);
 146
 147                 error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT,
 148                                        &eabh);
 149                 if (error)
 150                         break;
 151                 error = ea_foreach_i(ip, eabh, ea_call, data);
 152                 brelse(eabh);
 153                 if (error)
 154                         break;
 155         }
 156  out:
 157         brelse(bh);
 158
 159         return error;
 160 }
 161
 162 struct ea_find {
 163         struct gfs2_ea_request *ef_er;
 164         struct gfs2_ea_location *ef_el;
 165 };
 166
 167 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
 168                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 169                      void *private)
 170 {
 171         struct ea_find *ef = private;
 172         struct gfs2_ea_request *er = ef->ef_er;
 173
 174         if (ea->ea_type == GFS2_EATYPE_UNUSED)
 175                 return 0;
 176
 177         if (ea->ea_type == er->er_type) {
 178                 if (ea->ea_name_len == er->er_name_len &&
 179                     !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
 180                         struct gfs2_ea_location *el = ef->ef_el;
 181                         get_bh(bh);
 182                         el->el_bh = bh;
 183                         el->el_ea = ea;
 184                         el->el_prev = prev;
 185                         return 1;
 186                 }
 187         }
 188
 189 #if 0
 190         else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) &&
 191                  er->er_type == GFS2_EATYPE_SYS)
 192                 return 1;
 193 #endif
 194
 195         return 0;
 196 }
 197
 198 int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 199                  struct gfs2_ea_location *el)
 200 {
 201         struct ea_find ef;
 202         int error;
 203
 204         ef.ef_er = er;
 205         ef.ef_el = el;
 206
 207         memset(el, 0, sizeof(struct gfs2_ea_location));
 208
 209         error = ea_foreach(ip, ea_find_i, &ef);
 210         if (error > 0)
 211                 return 0;
 212
 213         return error;
 214 }
 215
 216 /**
 217  * ea_dealloc_unstuffed -
 218  * @ip:
 219  * @bh:
 220  * @ea:
 221  * @prev:
 222  * @private:
 223  *
 224  * Take advantage of the fact that all unstuffed blocks are
 225  * allocated from the same RG.  But watch, this may not always
 226  * be true.
 227  *
 228  * Returns: errno
 229  */
 230
 231 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 232                                 struct gfs2_ea_header *ea,
 233                                 struct gfs2_ea_header *prev, void *private)
 234 {
 235         int *leave = private;
 236         struct gfs2_sbd *sdp = ip->i_sbd;
 237         struct gfs2_rgrpd *rgd;
 238         struct gfs2_holder rg_gh;
 239         struct buffer_head *dibh;
 240         uint64_t *dataptrs, bn = 0;
 241         uint64_t bstart = 0;
 242         unsigned int blen = 0;
 243         unsigned int blks = 0;
 244         unsigned int x;
 245         int error;
 246
 247         if (GFS2_EA_IS_STUFFED(ea))
 248                 return 0;
 249
 250         dataptrs = GFS2_EA2DATAPTRS(ea);
 251         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
 252                 if (*dataptrs) {
 253                         blks++;
 254                         bn = be64_to_cpu(*dataptrs);
 255                 }
 256         if (!blks)
 257                 return 0;
 258
 259         rgd = gfs2_blk2rgrpd(sdp, bn);
 260         if (!rgd) {
 261                 gfs2_consist_inode(ip);
 262                 return -EIO;
 263         }
 264
 265         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
 266         if (error)
 267                 return error;
 268
 269         error = gfs2_trans_begin(sdp, rgd->rd_ri.ri_length +
 270                                  RES_DINODE + RES_EATTR + RES_STATFS +
 271                                  RES_QUOTA, blks);
 272         if (error)
 273                 goto out_gunlock;
 274
 275         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 276
 277         dataptrs = GFS2_EA2DATAPTRS(ea);
 278         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
 279                 if (!*dataptrs)
 280                         break;
 281                 bn = be64_to_cpu(*dataptrs);
 282
 283                 if (bstart + blen == bn)
 284                         blen++;
 285                 else {
 286                         if (bstart)
 287                                 gfs2_free_meta(ip, bstart, blen);
 288                         bstart = bn;
 289                         blen = 1;
 290                 }
 291
 292                 *dataptrs = 0;
 293                 if (!ip->i_di.di_blocks)
 294                         gfs2_consist_inode(ip);
 295                 ip->i_di.di_blocks--;
 296         }
 297         if (bstart)
 298                 gfs2_free_meta(ip, bstart, blen);
 299
 300         if (prev && !leave) {
 301                 uint32_t len;
 302
 303                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 304                 prev->ea_rec_len = cpu_to_be32(len);
 305
 306                 if (GFS2_EA_IS_LAST(ea))
 307                         prev->ea_flags |= GFS2_EAFLAG_LAST;
 308         } else {
 309                 ea->ea_type = GFS2_EATYPE_UNUSED;
 310                 ea->ea_num_ptrs = 0;
 311         }
 312
 313         error = gfs2_meta_inode_buffer(ip, &dibh);
 314         if (!error) {
 315                 ip->i_di.di_ctime = get_seconds();
 316                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 317                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
 318                 brelse(dibh);
 319         }
 320
 321         gfs2_trans_end(sdp);
 322
 323  out_gunlock:
 324         gfs2_glock_dq_uninit(&rg_gh);
 325
 326         return error;
 327 }
 328
 329 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 330                                struct gfs2_ea_header *ea,
 331                                struct gfs2_ea_header *prev, int leave)
 332 {
 333         struct gfs2_alloc *al;
 334         int error;
 335
 336         al = gfs2_alloc_get(ip);
 337
 338         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 339         if (error)
 340                 goto out_alloc;
 341
 342         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
 343         if (error)
 344                 goto out_quota;
 345
 346         error = ea_dealloc_unstuffed(ip,
 347                                      bh, ea, prev,
 348                                      (leave) ? &error : NULL);
 349
 350         gfs2_glock_dq_uninit(&al->al_ri_gh);
 351
 352  out_quota:
 353         gfs2_quota_unhold(ip);
 354
 355  out_alloc:
 356         gfs2_alloc_put(ip);
 357
 358         return error;
 359 }
 360
 361
 362 static int gfs2_ea_repack_i(struct gfs2_inode *ip)
 363 {
 364         return -EOPNOTSUPP;
 365 }
 366
 367 int gfs2_ea_repack(struct gfs2_inode *ip)
 368 {
 369         struct gfs2_holder gh;
 370         int error;
 371
 372         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 373         if (error)
 374                 return error;
 375
 376         /* Some sort of permissions checking would be nice */
 377
 378         error = gfs2_ea_repack_i(ip);
 379
 380         gfs2_glock_dq_uninit(&gh);
 381
 382         return error;
 383 }
 384
 385 struct ea_list {
 386         struct gfs2_ea_request *ei_er;
 387         unsigned int ei_size;
 388 };
 389
 390 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
 391                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 392                      void *private)
 393 {
 394         struct ea_list *ei = private;
 395         struct gfs2_ea_request *er = ei->ei_er;
 396         unsigned int ea_size = GFS2_EA_STRLEN(ea);
 397
 398         if (ea->ea_type == GFS2_EATYPE_UNUSED)
 399                 return 0;
 400
 401         if (er->er_data_len) {
 402                 char *prefix;
 403                 unsigned int l;
 404                 char c = 0;
 405
 406                 if (ei->ei_size + ea_size > er->er_data_len)
 407                         return -ERANGE;
 408
 409                 if (ea->ea_type == GFS2_EATYPE_USR) {
 410                         prefix = "user.";
 411                         l = 5;
 412                 } else {
 413                         prefix = "system.";
 414                         l = 7;
 415                 }
 416
 417                 memcpy(er->er_data + ei->ei_size,
 418                        prefix, l);
 419                 memcpy(er->er_data + ei->ei_size + l,
 420                        GFS2_EA2NAME(ea),
 421                        ea->ea_name_len);
 422                 memcpy(er->er_data + ei->ei_size +
 423                        ea_size - 1,
 424                        &c, 1);
 425         }
 426
 427         ei->ei_size += ea_size;
 428
 429         return 0;
 430 }
 431
 432 /**
 433  * gfs2_ea_list -
 434  * @ip:
 435  * @er:
 436  *
 437  * Returns: actual size of data on success, -errno on error
 438  */
 439
 440 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 441 {
 442         struct gfs2_holder i_gh;
 443         int error;
 444
 445         if (!er->er_data || !er->er_data_len) {
 446                 er->er_data = NULL;
 447                 er->er_data_len = 0;
 448         }
 449
 450         error = gfs2_glock_nq_init(ip->i_gl,
 451                                   LM_ST_SHARED, LM_FLAG_ANY,
 452                                   &i_gh);
 453         if (error)
 454                 return error;
 455
 456         if (ip->i_di.di_eattr) {
 457                 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
 458
 459                 error = ea_foreach(ip, ea_list_i, &ei);
 460                 if (!error)
 461                         error = ei.ei_size;
 462         }
 463
 464         gfs2_glock_dq_uninit(&i_gh);
 465
 466         return error;
 467 }
 468
 469 /**
 470  * ea_get_unstuffed - actually copies the unstuffed data into the
 471  *                    request buffer
 472  * @ip:
 473  * @ea:
 474  * @data:
 475  *
 476  * Returns: errno
 477  */
 478
 479 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 480                             char *data)
 481 {
 482         struct gfs2_sbd *sdp = ip->i_sbd;
 483         struct buffer_head **bh;
 484         unsigned int amount = GFS2_EA_DATA_LEN(ea);
 485         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
 486         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
 487         unsigned int x;
 488         int error = 0;
 489
 490         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
 491         if (!bh)
 492                 return -ENOMEM;
 493
 494         for (x = 0; x < nptrs; x++) {
 495                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
 496                                        DIO_START, bh + x);
 497                 if (error) {
 498                         while (x--)
 499                                 brelse(bh[x]);
 500                         goto out;
 501                 }
 502                 dataptrs++;
 503         }
 504
 505         for (x = 0; x < nptrs; x++) {
 506                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
 507                 if (error) {
 508                         for (; x < nptrs; x++)
 509                                 brelse(bh[x]);
 510                         goto out;
 511                 }
 512                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
 513                         for (; x < nptrs; x++)
 514                                 brelse(bh[x]);
 515                         error = -EIO;
 516                         goto out;
 517                 }
 518
 519                 memcpy(data,
 520                        bh[x]->b_data + sizeof(struct gfs2_meta_header),
 521                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
 522
 523                 amount -= sdp->sd_jbsize;
 524                 data += sdp->sd_jbsize;
 525
 526                 brelse(bh[x]);
 527         }
 528
 529  out:
 530         kfree(bh);
 531
 532         return error;
 533 }
 534
 535 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
 536                      char *data)
 537 {
 538         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
 539                 memcpy(data,
 540                        GFS2_EA2DATA(el->el_ea),
 541                        GFS2_EA_DATA_LEN(el->el_ea));
 542                 return 0;
 543         } else
 544                 return ea_get_unstuffed(ip, el->el_ea, data);
 545 }
 546
 547 /**
 548  * gfs2_ea_get_i -
 549  * @ip:
 550  * @er:
 551  *
 552  * Returns: actual size of data on success, -errno on error
 553  */
 554
 555 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 556 {
 557         struct gfs2_ea_location el;
 558         int error;
 559
 560         if (!ip->i_di.di_eattr)
 561                 return -ENODATA;
 562
 563         error = gfs2_ea_find(ip, er, &el);
 564         if (error)
 565                 return error;
 566         if (!el.el_ea)
 567                 return -ENODATA;
 568
 569         if (er->er_data_len) {
 570                 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
 571                         error =  -ERANGE;
 572                 else
 573                         error = gfs2_ea_get_copy(ip, &el, er->er_data);
 574         }
 575         if (!error)
 576                 error = GFS2_EA_DATA_LEN(el.el_ea);
 577
 578         brelse(el.el_bh);
 579
 580         return error;
 581 }
 582
 583 /**
 584  * gfs2_ea_get -
 585  * @ip:
 586  * @er:
 587  *
 588  * Returns: actual size of data on success, -errno on error
 589  */
 590
 591 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 592 {
 593         struct gfs2_holder i_gh;
 594         int error;
 595
 596         if (!er->er_name_len ||
 597             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
 598                 return -EINVAL;
 599         if (!er->er_data || !er->er_data_len) {
 600                 er->er_data = NULL;
 601                 er->er_data_len = 0;
 602         }
 603
 604         error = gfs2_glock_nq_init(ip->i_gl,
 605                                   LM_ST_SHARED, LM_FLAG_ANY,
 606                                   &i_gh);
 607         if (error)
 608                 return error;
 609
 610         error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
 611
 612         gfs2_glock_dq_uninit(&i_gh);
 613
 614         return error;
 615 }
 616
 617 /**
 618  * ea_alloc_blk - allocates a new block for extended attributes.
 619  * @ip: A pointer to the inode that's getting extended attributes
 620  * @bhp:
 621  *
 622  * Returns: errno
 623  */
 624
 625 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
 626 {
 627         struct gfs2_sbd *sdp = ip->i_sbd;
 628         struct gfs2_ea_header *ea;
 629         uint64_t block;
 630
 631         block = gfs2_alloc_meta(ip);
 632
 633         *bhp = gfs2_meta_new(ip->i_gl, block);
 634         gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
 635         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
 636         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
 637
 638         ea = GFS2_EA_BH2FIRST(*bhp);
 639         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
 640         ea->ea_type = GFS2_EATYPE_UNUSED;
 641         ea->ea_flags = GFS2_EAFLAG_LAST;
 642         ea->ea_num_ptrs = 0;
 643
 644         ip->i_di.di_blocks++;
 645
 646         return 0;
 647 }
 648
 649 /**
 650  * ea_write - writes the request info to an ea, creating new blocks if
 651  *            necessary
 652  * @ip:  inode that is being modified
 653  * @ea:  the location of the new ea in a block
 654  * @er: the write request
 655  *
 656  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
 657  *
 658  * returns : errno
 659  */
 660
 661 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 662                     struct gfs2_ea_request *er)
 663 {
 664         struct gfs2_sbd *sdp = ip->i_sbd;
 665
 666         ea->ea_data_len = cpu_to_be32(er->er_data_len);
 667         ea->ea_name_len = er->er_name_len;
 668         ea->ea_type = er->er_type;
 669         ea->__pad = 0;
 670
 671         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
 672
 673         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
 674                 ea->ea_num_ptrs = 0;
 675                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
 676         } else {
 677                 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
 678                 const char *data = er->er_data;
 679                 unsigned int data_len = er->er_data_len;
 680                 unsigned int copy;
 681                 unsigned int x;
 682
 683                 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
 684                 for (x = 0; x < ea->ea_num_ptrs; x++) {
 685                         struct buffer_head *bh;
 686                         uint64_t block;
 687                         int mh_size = sizeof(struct gfs2_meta_header);
 688
 689                         block = gfs2_alloc_meta(ip);
 690
 691                         bh = gfs2_meta_new(ip->i_gl, block);
 692                         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 693                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
 694
 695                         ip->i_di.di_blocks++;
 696
 697                         copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
 698                                                              data_len;
 699                         memcpy(bh->b_data + mh_size, data, copy);
 700                         if (copy < sdp->sd_jbsize)
 701                                 memset(bh->b_data + mh_size + copy, 0,
 702                                        sdp->sd_jbsize - copy);
 703
 704                         *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
 705                         data += copy;
 706                         data_len -= copy;
 707
 708                         brelse(bh);
 709                 }
 710
 711                 gfs2_assert_withdraw(sdp, !data_len);
 712         }
 713
 714         return 0;
 715 }
 716
 717 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
 718                                    struct gfs2_ea_request *er,
 719                                    void *private);
 720
 721 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 722                              unsigned int blks,
 723                              ea_skeleton_call_t skeleton_call,
 724                              void *private)
 725 {
 726         struct gfs2_alloc *al;
 727         struct buffer_head *dibh;
 728         int error;
 729
 730         al = gfs2_alloc_get(ip);
 731
 732         error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 733         if (error)
 734                 goto out;
 735
 736         error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
 737         if (error)
 738                 goto out_gunlock_q;
 739
 740         al->al_requested = blks;
 741
 742         error = gfs2_inplace_reserve(ip);
 743         if (error)
 744                 goto out_gunlock_q;
 745
 746         error = gfs2_trans_begin(ip->i_sbd,
 747                                  blks + al->al_rgd->rd_ri.ri_length +
 748                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
 749         if (error)
 750                 goto out_ipres;
 751
 752         error = skeleton_call(ip, er, private);
 753         if (error)
 754                 goto out_end_trans;
 755
 756         error = gfs2_meta_inode_buffer(ip, &dibh);
 757         if (!error) {
 758                 if (er->er_flags & GFS2_ERF_MODE) {
 759                         gfs2_assert_withdraw(ip->i_sbd,
 760                                             (ip->i_di.di_mode & S_IFMT) ==
 761                                             (er->er_mode & S_IFMT));
 762                         ip->i_di.di_mode = er->er_mode;
 763                 }
 764                 ip->i_di.di_ctime = get_seconds();
 765                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 766                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
 767                 brelse(dibh);
 768         }
 769
 770  out_end_trans:
 771         gfs2_trans_end(ip->i_sbd);
 772
 773  out_ipres:
 774         gfs2_inplace_release(ip);
 775
 776  out_gunlock_q:
 777         gfs2_quota_unlock(ip);
 778
 779  out:
 780         gfs2_alloc_put(ip);
 781
 782         return error;
 783 }
 784
 785 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 786                      void *private)
 787 {
 788         struct buffer_head *bh;
 789         int error;
 790
 791         error = ea_alloc_blk(ip, &bh);
 792         if (error)
 793                 return error;
 794
 795         ip->i_di.di_eattr = bh->b_blocknr;
 796         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
 797
 798         brelse(bh);
 799
 800         return error;
 801 }
 802
 803 /**
 804  * ea_init - initializes a new eattr block
 805  * @ip:
 806  * @er:
 807  *
 808  * Returns: errno
 809  */
 810
 811 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 812 {
 813         unsigned int jbsize = ip->i_sbd->sd_jbsize;
 814         unsigned int blks = 1;
 815
 816         if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
 817                 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
 818
 819         return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
 820 }
 821
 822 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
 823 {
 824         uint32_t ea_size = GFS2_EA_SIZE(ea);
 825         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
 826                                      ea_size);
 827         uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
 828         int last = ea->ea_flags & GFS2_EAFLAG_LAST;
 829
 830         ea->ea_rec_len = cpu_to_be32(ea_size);
 831         ea->ea_flags ^= last;
 832
 833         new->ea_rec_len = cpu_to_be32(new_size);
 834         new->ea_flags = last;
 835
 836         return new;
 837 }
 838
 839 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
 840                                   struct gfs2_ea_location *el)
 841 {
 842         struct gfs2_ea_header *ea = el->el_ea;
 843         struct gfs2_ea_header *prev = el->el_prev;
 844         uint32_t len;
 845
 846         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
 847
 848         if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
 849                 ea->ea_type = GFS2_EATYPE_UNUSED;
 850                 return;
 851         } else if (GFS2_EA2NEXT(prev) != ea) {
 852                 prev = GFS2_EA2NEXT(prev);
 853                 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
 854         }
 855
 856         len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 857         prev->ea_rec_len = cpu_to_be32(len);
 858
 859         if (GFS2_EA_IS_LAST(ea))
 860                 prev->ea_flags |= GFS2_EAFLAG_LAST;
 861 }
 862
 863 struct ea_set {
 864         int ea_split;
 865
 866         struct gfs2_ea_request *es_er;
 867         struct gfs2_ea_location *es_el;
 868
 869         struct buffer_head *es_bh;
 870         struct gfs2_ea_header *es_ea;
 871 };
 872
 873 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
 874                                  struct gfs2_ea_header *ea, struct ea_set *es)
 875 {
 876         struct gfs2_ea_request *er = es->es_er;
 877         struct buffer_head *dibh;
 878         int error;
 879
 880         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
 881         if (error)
 882                 return error;
 883
 884         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 885
 886         if (es->ea_split)
 887                 ea = ea_split_ea(ea);
 888
 889         ea_write(ip, ea, er);
 890
 891         if (es->es_el)
 892                 ea_set_remove_stuffed(ip, es->es_el);
 893
 894         error = gfs2_meta_inode_buffer(ip, &dibh);
 895         if (error)
 896                 goto out;
 897
 898         if (er->er_flags & GFS2_ERF_MODE) {
 899                 gfs2_assert_withdraw(ip->i_sbd,
 900                         (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
 901                 ip->i_di.di_mode = er->er_mode;
 902         }
 903         ip->i_di.di_ctime = get_seconds();
 904         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 905         gfs2_dinode_out(&ip->i_di, dibh->b_data);
 906         brelse(dibh);
 907  out:
 908         gfs2_trans_end(ip->i_sbd);
 909
 910         return error;
 911 }
 912
 913 static int ea_set_simple_alloc(struct gfs2_inode *ip,
 914                                struct gfs2_ea_request *er, void *private)
 915 {
 916         struct ea_set *es = private;
 917         struct gfs2_ea_header *ea = es->es_ea;
 918         int error;
 919
 920         gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
 921
 922         if (es->ea_split)
 923                 ea = ea_split_ea(ea);
 924
 925         error = ea_write(ip, ea, er);
 926         if (error)
 927                 return error;
 928
 929         if (es->es_el)
 930                 ea_set_remove_stuffed(ip, es->es_el);
 931
 932         return 0;
 933 }
 934
 935 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
 936                          struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 937                          void *private)
 938 {
 939         struct ea_set *es = private;
 940         unsigned int size;
 941         int stuffed;
 942         int error;
 943
 944         stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size);
 945
 946         if (ea->ea_type == GFS2_EATYPE_UNUSED) {
 947                 if (GFS2_EA_REC_LEN(ea) < size)
 948                         return 0;
 949                 if (!GFS2_EA_IS_STUFFED(ea)) {
 950                         error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
 951                         if (error)
 952                                 return error;
 953                 }
 954                 es->ea_split = 0;
 955         } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
 956                 es->ea_split = 1;
 957         else
 958                 return 0;
 959
 960         if (stuffed) {
 961                 error = ea_set_simple_noalloc(ip, bh, ea, es);
 962                 if (error)
 963                         return error;
 964         } else {
 965                 unsigned int blks;
 966
 967                 es->es_bh = bh;
 968                 es->es_ea = ea;
 969                 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
 970                                         ip->i_sbd->sd_jbsize);
 971
 972                 error = ea_alloc_skeleton(ip, es->es_er, blks,
 973                                           ea_set_simple_alloc, es);
 974                 if (error)
 975                         return error;
 976         }
 977
 978         return 1;
 979 }
 980
 981 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 982                         void *private)
 983 {
 984         struct gfs2_sbd *sdp = ip->i_sbd;
 985         struct buffer_head *indbh, *newbh;
 986         uint64_t *eablk;
 987         int error;
 988         int mh_size = sizeof(struct gfs2_meta_header);
 989
 990         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
 991                 uint64_t *end;
 992
 993                 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
 994                                        DIO_START | DIO_WAIT, &indbh);
 995                 if (error)
 996                         return error;
 997
 998                 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
 999                         error = -EIO;
1000                         goto out;
1001                 }
1002
1003                 eablk = (uint64_t *)(indbh->b_data + mh_size);
1004                 end = eablk + sdp->sd_inptrs;
1005
1006                 for (; eablk < end; eablk++)
1007                         if (!*eablk)
1008                                 break;
1009
1010                 if (eablk == end) {
1011                         error = -ENOSPC;
1012                         goto out;
1013                 }
1014
1015                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1016         } else {
1017                 uint64_t blk;
1018
1019                 blk = gfs2_alloc_meta(ip);
1020
1021                 indbh = gfs2_meta_new(ip->i_gl, blk);
1022                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1023                 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1024                 gfs2_buffer_clear_tail(indbh, mh_size);
1025
1026                 eablk = (uint64_t *)(indbh->b_data + mh_size);
1027                 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1028                 ip->i_di.di_eattr = blk;
1029                 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1030                 ip->i_di.di_blocks++;
1031
1032                 eablk++;
1033         }
1034
1035         error = ea_alloc_blk(ip, &newbh);
1036         if (error)
1037                 goto out;
1038
1039         *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1040         error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1041         brelse(newbh);
1042         if (error)
1043                 goto out;
1044
1045         if (private)
1046                 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1047
1048  out:
1049         brelse(indbh);
1050
1051         return error;
1052 }
1053
1054 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1055                     struct gfs2_ea_location *el)
1056 {
1057         struct ea_set es;
1058         unsigned int blks = 2;
1059         int error;
1060
1061         memset(&es, 0, sizeof(struct ea_set));
1062         es.es_er = er;
1063         es.es_el = el;
1064
1065         error = ea_foreach(ip, ea_set_simple, &es);
1066         if (error > 0)
1067                 return 0;
1068         if (error)
1069                 return error;
1070
1071         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1072                 blks++;
1073         if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
1074                 blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize);
1075
1076         return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1077 }
1078
1079 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1080                                    struct gfs2_ea_location *el)
1081 {
1082         if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1083                 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1084                 gfs2_assert_withdraw(ip->i_sbd,
1085                                      GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1086         }
1087
1088         return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1089 }
1090
1091 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1092 {
1093         struct gfs2_ea_location el;
1094         int error;
1095
1096         if (!ip->i_di.di_eattr) {
1097                 if (er->er_flags & XATTR_REPLACE)
1098                         return -ENODATA;
1099                 return ea_init(ip, er);
1100         }
1101
1102         error = gfs2_ea_find(ip, er, &el);
1103         if (error)
1104                 return error;
1105
1106         if (el.el_ea) {
1107                 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1108                         brelse(el.el_bh);
1109                         return -EPERM;
1110                 }
1111
1112                 error = -EEXIST;
1113                 if (!(er->er_flags & XATTR_CREATE)) {
1114                         int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1115                         error = ea_set_i(ip, er, &el);
1116                         if (!error && unstuffed)
1117                                 ea_set_remove_unstuffed(ip, &el);
1118                 }
1119
1120                 brelse(el.el_bh);
1121         } else {
1122                 error = -ENODATA;
1123                 if (!(er->er_flags & XATTR_REPLACE))
1124                         error = ea_set_i(ip, er, NULL);
1125         }
1126
1127         return error;
1128 }
1129
1130 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1131 {
1132         struct gfs2_holder i_gh;
1133         int error;
1134
1135         if (!er->er_name_len ||
1136             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1137                 return -EINVAL;
1138         if (!er->er_data || !er->er_data_len) {
1139                 er->er_data = NULL;
1140                 er->er_data_len = 0;
1141         }
1142         error = ea_check_size(ip->i_sbd, er);
1143         if (error)
1144                 return error;
1145
1146         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1147         if (error)
1148                 return error;
1149
1150         if (IS_IMMUTABLE(ip->i_vnode))
1151                 error = -EPERM;
1152         else
1153                 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1154
1155         gfs2_glock_dq_uninit(&i_gh);
1156
1157         return error;
1158 }
1159
1160 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1161 {
1162         struct gfs2_ea_header *ea = el->el_ea;
1163         struct gfs2_ea_header *prev = el->el_prev;
1164         struct buffer_head *dibh;
1165         int error;
1166
1167         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1168         if (error)
1169                 return error;
1170
1171         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1172
1173         if (prev) {
1174                 uint32_t len;
1175
1176                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1177                 prev->ea_rec_len = cpu_to_be32(len);
1178
1179                 if (GFS2_EA_IS_LAST(ea))
1180                         prev->ea_flags |= GFS2_EAFLAG_LAST;
1181         } else
1182                 ea->ea_type = GFS2_EATYPE_UNUSED;
1183
1184         error = gfs2_meta_inode_buffer(ip, &dibh);
1185         if (!error) {
1186                 ip->i_di.di_ctime = get_seconds();
1187                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1188                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1189                 brelse(dibh);
1190         }
1191
1192         gfs2_trans_end(ip->i_sbd);
1193
1194         return error;
1195 }
1196
1197 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1198 {
1199         struct gfs2_ea_location el;
1200         int error;
1201
1202         if (!ip->i_di.di_eattr)
1203                 return -ENODATA;
1204
1205         error = gfs2_ea_find(ip, er, &el);
1206         if (error)
1207                 return error;
1208         if (!el.el_ea)
1209                 return -ENODATA;
1210
1211         if (GFS2_EA_IS_STUFFED(el.el_ea))
1212                 error = ea_remove_stuffed(ip, &el);
1213         else
1214                 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1215                                             0);
1216
1217         brelse(el.el_bh);
1218
1219         return error;
1220 }
1221
1222 /**
1223  * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1224  * @ip: pointer to the inode of the target file
1225  * @er: request information
1226  *
1227  * Returns: errno
1228  */
1229
1230 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1231 {
1232         struct gfs2_holder i_gh;
1233         int error;
1234
1235         if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1236                 return -EINVAL;
1237
1238         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1239         if (error)
1240                 return error;
1241
1242         if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1243                 error = -EPERM;
1244         else
1245                 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1246
1247         gfs2_glock_dq_uninit(&i_gh);
1248
1249         return error;
1250 }
1251
1252 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1253                                   struct gfs2_ea_header *ea, char *data)
1254 {
1255         struct gfs2_sbd *sdp = ip->i_sbd;
1256         struct buffer_head **bh;
1257         unsigned int amount = GFS2_EA_DATA_LEN(ea);
1258         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1259         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1260         unsigned int x;
1261         int error;
1262
1263         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1264         if (!bh)
1265                 return -ENOMEM;
1266
1267         error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1268         if (error)
1269                 goto out;
1270
1271         for (x = 0; x < nptrs; x++) {
1272                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1273                                        DIO_START, bh + x);
1274                 if (error) {
1275                         while (x--)
1276                                 brelse(bh[x]);
1277                         goto fail;
1278                 }
1279                 dataptrs++;
1280         }
1281
1282         for (x = 0; x < nptrs; x++) {
1283                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1284                 if (error) {
1285                         for (; x < nptrs; x++)
1286                                 brelse(bh[x]);
1287                         goto fail;
1288                 }
1289                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1290                         for (; x < nptrs; x++)
1291                                 brelse(bh[x]);
1292                         error = -EIO;
1293                         goto fail;
1294                 }
1295
1296                 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1297
1298                 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1299                        data,
1300                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1301
1302                 amount -= sdp->sd_jbsize;
1303                 data += sdp->sd_jbsize;
1304
1305                 brelse(bh[x]);
1306         }
1307
1308  out:
1309         kfree(bh);
1310
1311         return error;
1312
1313  fail:
1314         gfs2_trans_end(sdp);
1315         kfree(bh);
1316
1317         return error;
1318 }
1319
1320 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1321                       struct iattr *attr, char *data)
1322 {
1323         struct buffer_head *dibh;
1324         int error;
1325
1326         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1327                 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1328                 if (error)
1329                         return error;
1330
1331                 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1332                 memcpy(GFS2_EA2DATA(el->el_ea),
1333                        data,
1334                        GFS2_EA_DATA_LEN(el->el_ea));
1335         } else
1336                 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1337
1338         if (error)
1339                 return error;
1340
1341         error = gfs2_meta_inode_buffer(ip, &dibh);
1342         if (!error) {
1343                 error = inode_setattr(ip->i_vnode, attr);
1344                 gfs2_assert_warn(ip->i_sbd, !error);
1345                 gfs2_inode_attr_out(ip);
1346                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1347                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1348                 brelse(dibh);
1349         }
1350
1351         gfs2_trans_end(ip->i_sbd);
1352
1353         return error;
1354 }
1355
1356 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1357 {
1358         struct gfs2_sbd *sdp = ip->i_sbd;
1359         struct gfs2_rgrp_list rlist;
1360         struct buffer_head *indbh, *dibh;
1361         uint64_t *eablk, *end;
1362         unsigned int rg_blocks = 0;
1363         uint64_t bstart = 0;
1364         unsigned int blen = 0;
1365         unsigned int blks = 0;
1366         unsigned int x;
1367         int error;
1368
1369         memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1370
1371         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1372                                DIO_START | DIO_WAIT, &indbh);
1373         if (error)
1374                 return error;
1375
1376         if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1377                 error = -EIO;
1378                 goto out;
1379         }
1380
1381         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1382         end = eablk + sdp->sd_inptrs;
1383
1384         for (; eablk < end; eablk++) {
1385                 uint64_t bn;
1386
1387                 if (!*eablk)
1388                         break;
1389                 bn = be64_to_cpu(*eablk);
1390
1391                 if (bstart + blen == bn)
1392                         blen++;
1393                 else {
1394                         if (bstart)
1395                                 gfs2_rlist_add(sdp, &rlist, bstart);
1396                         bstart = bn;
1397                         blen = 1;
1398                 }
1399                 blks++;
1400         }
1401         if (bstart)
1402                 gfs2_rlist_add(sdp, &rlist, bstart);
1403         else
1404                 goto out;
1405
1406         gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1407
1408         for (x = 0; x < rlist.rl_rgrps; x++) {
1409                 struct gfs2_rgrpd *rgd;
1410                 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1411                 rg_blocks += rgd->rd_ri.ri_length;
1412         }
1413
1414         error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1415         if (error)
1416                 goto out_rlist_free;
1417
1418         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1419                                  RES_INDIRECT + RES_STATFS +
1420                                  RES_QUOTA, blks);
1421         if (error)
1422                 goto out_gunlock;
1423
1424         gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1425
1426         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1427         bstart = 0;
1428         blen = 0;
1429
1430         for (; eablk < end; eablk++) {
1431                 uint64_t bn;
1432
1433                 if (!*eablk)
1434                         break;
1435                 bn = be64_to_cpu(*eablk);
1436
1437                 if (bstart + blen == bn)
1438                         blen++;
1439                 else {
1440                         if (bstart)
1441                                 gfs2_free_meta(ip, bstart, blen);
1442                         bstart = bn;
1443                         blen = 1;
1444                 }
1445
1446                 *eablk = 0;
1447                 if (!ip->i_di.di_blocks)
1448                         gfs2_consist_inode(ip);
1449                 ip->i_di.di_blocks--;
1450         }
1451         if (bstart)
1452                 gfs2_free_meta(ip, bstart, blen);
1453
1454         ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1455
1456         error = gfs2_meta_inode_buffer(ip, &dibh);
1457         if (!error) {
1458                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1459                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1460                 brelse(dibh);
1461         }
1462
1463         gfs2_trans_end(sdp);
1464
1465  out_gunlock:
1466         gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1467
1468  out_rlist_free:
1469         gfs2_rlist_free(&rlist);
1470
1471  out:
1472         brelse(indbh);
1473
1474         return error;
1475 }
1476
1477 static int ea_dealloc_block(struct gfs2_inode *ip)
1478 {
1479         struct gfs2_sbd *sdp = ip->i_sbd;
1480         struct gfs2_alloc *al = &ip->i_alloc;
1481         struct gfs2_rgrpd *rgd;
1482         struct buffer_head *dibh;
1483         int error;
1484
1485         rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1486         if (!rgd) {
1487                 gfs2_consist_inode(ip);
1488                 return -EIO;
1489         }
1490
1491         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1492                                    &al->al_rgd_gh);
1493         if (error)
1494                 return error;
1495
1496         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1497                                  RES_STATFS + RES_QUOTA, 1);
1498         if (error)
1499                 goto out_gunlock;
1500
1501         gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1502
1503         ip->i_di.di_eattr = 0;
1504         if (!ip->i_di.di_blocks)
1505                 gfs2_consist_inode(ip);
1506         ip->i_di.di_blocks--;
1507
1508         error = gfs2_meta_inode_buffer(ip, &dibh);
1509         if (!error) {
1510                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1511                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1512                 brelse(dibh);
1513         }
1514
1515         gfs2_trans_end(sdp);
1516
1517  out_gunlock:
1518         gfs2_glock_dq_uninit(&al->al_rgd_gh);
1519
1520         return error;
1521 }
1522
1523 /**
1524  * gfs2_ea_dealloc - deallocate the extended attribute fork
1525  * @ip: the inode
1526  *
1527  * Returns: errno
1528  */
1529
1530 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1531 {
1532         struct gfs2_alloc *al;
1533         int error;
1534
1535         al = gfs2_alloc_get(ip);
1536
1537         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1538         if (error)
1539                 goto out_alloc;
1540
1541         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1542         if (error)
1543                 goto out_quota;
1544
1545         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1546         if (error)
1547                 goto out_rindex;
1548
1549         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1550                 error = ea_dealloc_indirect(ip);
1551                 if (error)
1552                         goto out_rindex;
1553         }
1554
1555         error = ea_dealloc_block(ip);
1556
1557  out_rindex:
1558         gfs2_glock_dq_uninit(&al->al_ri_gh);
1559
1560  out_quota:
1561         gfs2_quota_unhold(ip);
1562
1563  out_alloc:
1564         gfs2_alloc_put(ip);
1565
1566         return error;
1567 }
1568