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 struct ea_list {
 362         struct gfs2_ea_request *ei_er;
 363         unsigned int ei_size;
 364 };
 365
 366 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
 367                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 368                      void *private)
 369 {
 370         struct ea_list *ei = private;
 371         struct gfs2_ea_request *er = ei->ei_er;
 372         unsigned int ea_size = GFS2_EA_STRLEN(ea);
 373
 374         if (ea->ea_type == GFS2_EATYPE_UNUSED)
 375                 return 0;
 376
 377         if (er->er_data_len) {
 378                 char *prefix;
 379                 unsigned int l;
 380                 char c = 0;
 381
 382                 if (ei->ei_size + ea_size > er->er_data_len)
 383                         return -ERANGE;
 384
 385                 if (ea->ea_type == GFS2_EATYPE_USR) {
 386                         prefix = "user.";
 387                         l = 5;
 388                 } else {
 389                         prefix = "system.";
 390                         l = 7;
 391                 }
 392
 393                 memcpy(er->er_data + ei->ei_size,
 394                        prefix, l);
 395                 memcpy(er->er_data + ei->ei_size + l,
 396                        GFS2_EA2NAME(ea),
 397                        ea->ea_name_len);
 398                 memcpy(er->er_data + ei->ei_size +
 399                        ea_size - 1,
 400                        &c, 1);
 401         }
 402
 403         ei->ei_size += ea_size;
 404
 405         return 0;
 406 }
 407
 408 /**
 409  * gfs2_ea_list -
 410  * @ip:
 411  * @er:
 412  *
 413  * Returns: actual size of data on success, -errno on error
 414  */
 415
 416 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 417 {
 418         struct gfs2_holder i_gh;
 419         int error;
 420
 421         if (!er->er_data || !er->er_data_len) {
 422                 er->er_data = NULL;
 423                 er->er_data_len = 0;
 424         }
 425
 426         error = gfs2_glock_nq_init(ip->i_gl,
 427                                   LM_ST_SHARED, LM_FLAG_ANY,
 428                                   &i_gh);
 429         if (error)
 430                 return error;
 431
 432         if (ip->i_di.di_eattr) {
 433                 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
 434
 435                 error = ea_foreach(ip, ea_list_i, &ei);
 436                 if (!error)
 437                         error = ei.ei_size;
 438         }
 439
 440         gfs2_glock_dq_uninit(&i_gh);
 441
 442         return error;
 443 }
 444
 445 /**
 446  * ea_get_unstuffed - actually copies the unstuffed data into the
 447  *                    request buffer
 448  * @ip:
 449  * @ea:
 450  * @data:
 451  *
 452  * Returns: errno
 453  */
 454
 455 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 456                             char *data)
 457 {
 458         struct gfs2_sbd *sdp = ip->i_sbd;
 459         struct buffer_head **bh;
 460         unsigned int amount = GFS2_EA_DATA_LEN(ea);
 461         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
 462         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
 463         unsigned int x;
 464         int error = 0;
 465
 466         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
 467         if (!bh)
 468                 return -ENOMEM;
 469
 470         for (x = 0; x < nptrs; x++) {
 471                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
 472                                        DIO_START, bh + x);
 473                 if (error) {
 474                         while (x--)
 475                                 brelse(bh[x]);
 476                         goto out;
 477                 }
 478                 dataptrs++;
 479         }
 480
 481         for (x = 0; x < nptrs; x++) {
 482                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
 483                 if (error) {
 484                         for (; x < nptrs; x++)
 485                                 brelse(bh[x]);
 486                         goto out;
 487                 }
 488                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
 489                         for (; x < nptrs; x++)
 490                                 brelse(bh[x]);
 491                         error = -EIO;
 492                         goto out;
 493                 }
 494
 495                 memcpy(data,
 496                        bh[x]->b_data + sizeof(struct gfs2_meta_header),
 497                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
 498
 499                 amount -= sdp->sd_jbsize;
 500                 data += sdp->sd_jbsize;
 501
 502                 brelse(bh[x]);
 503         }
 504
 505  out:
 506         kfree(bh);
 507
 508         return error;
 509 }
 510
 511 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
 512                      char *data)
 513 {
 514         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
 515                 memcpy(data,
 516                        GFS2_EA2DATA(el->el_ea),
 517                        GFS2_EA_DATA_LEN(el->el_ea));
 518                 return 0;
 519         } else
 520                 return ea_get_unstuffed(ip, el->el_ea, data);
 521 }
 522
 523 /**
 524  * gfs2_ea_get_i -
 525  * @ip:
 526  * @er:
 527  *
 528  * Returns: actual size of data on success, -errno on error
 529  */
 530
 531 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 532 {
 533         struct gfs2_ea_location el;
 534         int error;
 535
 536         if (!ip->i_di.di_eattr)
 537                 return -ENODATA;
 538
 539         error = gfs2_ea_find(ip, er, &el);
 540         if (error)
 541                 return error;
 542         if (!el.el_ea)
 543                 return -ENODATA;
 544
 545         if (er->er_data_len) {
 546                 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
 547                         error =  -ERANGE;
 548                 else
 549                         error = gfs2_ea_get_copy(ip, &el, er->er_data);
 550         }
 551         if (!error)
 552                 error = GFS2_EA_DATA_LEN(el.el_ea);
 553
 554         brelse(el.el_bh);
 555
 556         return error;
 557 }
 558
 559 /**
 560  * gfs2_ea_get -
 561  * @ip:
 562  * @er:
 563  *
 564  * Returns: actual size of data on success, -errno on error
 565  */
 566
 567 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 568 {
 569         struct gfs2_holder i_gh;
 570         int error;
 571
 572         if (!er->er_name_len ||
 573             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
 574                 return -EINVAL;
 575         if (!er->er_data || !er->er_data_len) {
 576                 er->er_data = NULL;
 577                 er->er_data_len = 0;
 578         }
 579
 580         error = gfs2_glock_nq_init(ip->i_gl,
 581                                   LM_ST_SHARED, LM_FLAG_ANY,
 582                                   &i_gh);
 583         if (error)
 584                 return error;
 585
 586         error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
 587
 588         gfs2_glock_dq_uninit(&i_gh);
 589
 590         return error;
 591 }
 592
 593 /**
 594  * ea_alloc_blk - allocates a new block for extended attributes.
 595  * @ip: A pointer to the inode that's getting extended attributes
 596  * @bhp:
 597  *
 598  * Returns: errno
 599  */
 600
 601 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
 602 {
 603         struct gfs2_sbd *sdp = ip->i_sbd;
 604         struct gfs2_ea_header *ea;
 605         uint64_t block;
 606
 607         block = gfs2_alloc_meta(ip);
 608
 609         *bhp = gfs2_meta_new(ip->i_gl, block);
 610         gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
 611         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
 612         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
 613
 614         ea = GFS2_EA_BH2FIRST(*bhp);
 615         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
 616         ea->ea_type = GFS2_EATYPE_UNUSED;
 617         ea->ea_flags = GFS2_EAFLAG_LAST;
 618         ea->ea_num_ptrs = 0;
 619
 620         ip->i_di.di_blocks++;
 621
 622         return 0;
 623 }
 624
 625 /**
 626  * ea_write - writes the request info to an ea, creating new blocks if
 627  *            necessary
 628  * @ip:  inode that is being modified
 629  * @ea:  the location of the new ea in a block
 630  * @er: the write request
 631  *
 632  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
 633  *
 634  * returns : errno
 635  */
 636
 637 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 638                     struct gfs2_ea_request *er)
 639 {
 640         struct gfs2_sbd *sdp = ip->i_sbd;
 641
 642         ea->ea_data_len = cpu_to_be32(er->er_data_len);
 643         ea->ea_name_len = er->er_name_len;
 644         ea->ea_type = er->er_type;
 645         ea->__pad = 0;
 646
 647         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
 648
 649         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
 650                 ea->ea_num_ptrs = 0;
 651                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
 652         } else {
 653                 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
 654                 const char *data = er->er_data;
 655                 unsigned int data_len = er->er_data_len;
 656                 unsigned int copy;
 657                 unsigned int x;
 658
 659                 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
 660                 for (x = 0; x < ea->ea_num_ptrs; x++) {
 661                         struct buffer_head *bh;
 662                         uint64_t block;
 663                         int mh_size = sizeof(struct gfs2_meta_header);
 664
 665                         block = gfs2_alloc_meta(ip);
 666
 667                         bh = gfs2_meta_new(ip->i_gl, block);
 668                         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 669                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
 670
 671                         ip->i_di.di_blocks++;
 672
 673                         copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
 674                                                              data_len;
 675                         memcpy(bh->b_data + mh_size, data, copy);
 676                         if (copy < sdp->sd_jbsize)
 677                                 memset(bh->b_data + mh_size + copy, 0,
 678                                        sdp->sd_jbsize - copy);
 679
 680                         *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
 681                         data += copy;
 682                         data_len -= copy;
 683
 684                         brelse(bh);
 685                 }
 686
 687                 gfs2_assert_withdraw(sdp, !data_len);
 688         }
 689
 690         return 0;
 691 }
 692
 693 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
 694                                    struct gfs2_ea_request *er,
 695                                    void *private);
 696
 697 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 698                              unsigned int blks,
 699                              ea_skeleton_call_t skeleton_call,
 700                              void *private)
 701 {
 702         struct gfs2_alloc *al;
 703         struct buffer_head *dibh;
 704         int error;
 705
 706         al = gfs2_alloc_get(ip);
 707
 708         error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 709         if (error)
 710                 goto out;
 711
 712         error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
 713         if (error)
 714                 goto out_gunlock_q;
 715
 716         al->al_requested = blks;
 717
 718         error = gfs2_inplace_reserve(ip);
 719         if (error)
 720                 goto out_gunlock_q;
 721
 722         error = gfs2_trans_begin(ip->i_sbd,
 723                                  blks + al->al_rgd->rd_ri.ri_length +
 724                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
 725         if (error)
 726                 goto out_ipres;
 727
 728         error = skeleton_call(ip, er, private);
 729         if (error)
 730                 goto out_end_trans;
 731
 732         error = gfs2_meta_inode_buffer(ip, &dibh);
 733         if (!error) {
 734                 if (er->er_flags & GFS2_ERF_MODE) {
 735                         gfs2_assert_withdraw(ip->i_sbd,
 736                                             (ip->i_di.di_mode & S_IFMT) ==
 737                                             (er->er_mode & S_IFMT));
 738                         ip->i_di.di_mode = er->er_mode;
 739                 }
 740                 ip->i_di.di_ctime = get_seconds();
 741                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 742                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
 743                 brelse(dibh);
 744         }
 745
 746  out_end_trans:
 747         gfs2_trans_end(ip->i_sbd);
 748
 749  out_ipres:
 750         gfs2_inplace_release(ip);
 751
 752  out_gunlock_q:
 753         gfs2_quota_unlock(ip);
 754
 755  out:
 756         gfs2_alloc_put(ip);
 757
 758         return error;
 759 }
 760
 761 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 762                      void *private)
 763 {
 764         struct buffer_head *bh;
 765         int error;
 766
 767         error = ea_alloc_blk(ip, &bh);
 768         if (error)
 769                 return error;
 770
 771         ip->i_di.di_eattr = bh->b_blocknr;
 772         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
 773
 774         brelse(bh);
 775
 776         return error;
 777 }
 778
 779 /**
 780  * ea_init - initializes a new eattr block
 781  * @ip:
 782  * @er:
 783  *
 784  * Returns: errno
 785  */
 786
 787 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 788 {
 789         unsigned int jbsize = ip->i_sbd->sd_jbsize;
 790         unsigned int blks = 1;
 791
 792         if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
 793                 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
 794
 795         return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
 796 }
 797
 798 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
 799 {
 800         uint32_t ea_size = GFS2_EA_SIZE(ea);
 801         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
 802                                      ea_size);
 803         uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
 804         int last = ea->ea_flags & GFS2_EAFLAG_LAST;
 805
 806         ea->ea_rec_len = cpu_to_be32(ea_size);
 807         ea->ea_flags ^= last;
 808
 809         new->ea_rec_len = cpu_to_be32(new_size);
 810         new->ea_flags = last;
 811
 812         return new;
 813 }
 814
 815 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
 816                                   struct gfs2_ea_location *el)
 817 {
 818         struct gfs2_ea_header *ea = el->el_ea;
 819         struct gfs2_ea_header *prev = el->el_prev;
 820         uint32_t len;
 821
 822         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
 823
 824         if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
 825                 ea->ea_type = GFS2_EATYPE_UNUSED;
 826                 return;
 827         } else if (GFS2_EA2NEXT(prev) != ea) {
 828                 prev = GFS2_EA2NEXT(prev);
 829                 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
 830         }
 831
 832         len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 833         prev->ea_rec_len = cpu_to_be32(len);
 834
 835         if (GFS2_EA_IS_LAST(ea))
 836                 prev->ea_flags |= GFS2_EAFLAG_LAST;
 837 }
 838
 839 struct ea_set {
 840         int ea_split;
 841
 842         struct gfs2_ea_request *es_er;
 843         struct gfs2_ea_location *es_el;
 844
 845         struct buffer_head *es_bh;
 846         struct gfs2_ea_header *es_ea;
 847 };
 848
 849 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
 850                                  struct gfs2_ea_header *ea, struct ea_set *es)
 851 {
 852         struct gfs2_ea_request *er = es->es_er;
 853         struct buffer_head *dibh;
 854         int error;
 855
 856         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
 857         if (error)
 858                 return error;
 859
 860         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 861
 862         if (es->ea_split)
 863                 ea = ea_split_ea(ea);
 864
 865         ea_write(ip, ea, er);
 866
 867         if (es->es_el)
 868                 ea_set_remove_stuffed(ip, es->es_el);
 869
 870         error = gfs2_meta_inode_buffer(ip, &dibh);
 871         if (error)
 872                 goto out;
 873
 874         if (er->er_flags & GFS2_ERF_MODE) {
 875                 gfs2_assert_withdraw(ip->i_sbd,
 876                         (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
 877                 ip->i_di.di_mode = er->er_mode;
 878         }
 879         ip->i_di.di_ctime = get_seconds();
 880         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 881         gfs2_dinode_out(&ip->i_di, dibh->b_data);
 882         brelse(dibh);
 883  out:
 884         gfs2_trans_end(ip->i_sbd);
 885
 886         return error;
 887 }
 888
 889 static int ea_set_simple_alloc(struct gfs2_inode *ip,
 890                                struct gfs2_ea_request *er, void *private)
 891 {
 892         struct ea_set *es = private;
 893         struct gfs2_ea_header *ea = es->es_ea;
 894         int error;
 895
 896         gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
 897
 898         if (es->ea_split)
 899                 ea = ea_split_ea(ea);
 900
 901         error = ea_write(ip, ea, er);
 902         if (error)
 903                 return error;
 904
 905         if (es->es_el)
 906                 ea_set_remove_stuffed(ip, es->es_el);
 907
 908         return 0;
 909 }
 910
 911 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
 912                          struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 913                          void *private)
 914 {
 915         struct ea_set *es = private;
 916         unsigned int size;
 917         int stuffed;
 918         int error;
 919
 920         stuffed = ea_calc_size(ip->i_sbd, es->es_er, &size);
 921
 922         if (ea->ea_type == GFS2_EATYPE_UNUSED) {
 923                 if (GFS2_EA_REC_LEN(ea) < size)
 924                         return 0;
 925                 if (!GFS2_EA_IS_STUFFED(ea)) {
 926                         error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
 927                         if (error)
 928                                 return error;
 929                 }
 930                 es->ea_split = 0;
 931         } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
 932                 es->ea_split = 1;
 933         else
 934                 return 0;
 935
 936         if (stuffed) {
 937                 error = ea_set_simple_noalloc(ip, bh, ea, es);
 938                 if (error)
 939                         return error;
 940         } else {
 941                 unsigned int blks;
 942
 943                 es->es_bh = bh;
 944                 es->es_ea = ea;
 945                 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
 946                                         ip->i_sbd->sd_jbsize);
 947
 948                 error = ea_alloc_skeleton(ip, es->es_er, blks,
 949                                           ea_set_simple_alloc, es);
 950                 if (error)
 951                         return error;
 952         }
 953
 954         return 1;
 955 }
 956
 957 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 958                         void *private)
 959 {
 960         struct gfs2_sbd *sdp = ip->i_sbd;
 961         struct buffer_head *indbh, *newbh;
 962         uint64_t *eablk;
 963         int error;
 964         int mh_size = sizeof(struct gfs2_meta_header);
 965
 966         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
 967                 uint64_t *end;
 968
 969                 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
 970                                        DIO_START | DIO_WAIT, &indbh);
 971                 if (error)
 972                         return error;
 973
 974                 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
 975                         error = -EIO;
 976                         goto out;
 977                 }
 978
 979                 eablk = (uint64_t *)(indbh->b_data + mh_size);
 980                 end = eablk + sdp->sd_inptrs;
 981
 982                 for (; eablk < end; eablk++)
 983                         if (!*eablk)
 984                                 break;
 985
 986                 if (eablk == end) {
 987                         error = -ENOSPC;
 988                         goto out;
 989                 }
 990
 991                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
 992         } else {
 993                 uint64_t blk;
 994
 995                 blk = gfs2_alloc_meta(ip);
 996
 997                 indbh = gfs2_meta_new(ip->i_gl, blk);
 998                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
 999                 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1000                 gfs2_buffer_clear_tail(indbh, mh_size);
1001
1002                 eablk = (uint64_t *)(indbh->b_data + mh_size);
1003                 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1004                 ip->i_di.di_eattr = blk;
1005                 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1006                 ip->i_di.di_blocks++;
1007
1008                 eablk++;
1009         }
1010
1011         error = ea_alloc_blk(ip, &newbh);
1012         if (error)
1013                 goto out;
1014
1015         *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1016         error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1017         brelse(newbh);
1018         if (error)
1019                 goto out;
1020
1021         if (private)
1022                 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1023
1024  out:
1025         brelse(indbh);
1026
1027         return error;
1028 }
1029
1030 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1031                     struct gfs2_ea_location *el)
1032 {
1033         struct ea_set es;
1034         unsigned int blks = 2;
1035         int error;
1036
1037         memset(&es, 0, sizeof(struct ea_set));
1038         es.es_er = er;
1039         es.es_el = el;
1040
1041         error = ea_foreach(ip, ea_set_simple, &es);
1042         if (error > 0)
1043                 return 0;
1044         if (error)
1045                 return error;
1046
1047         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1048                 blks++;
1049         if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
1050                 blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize);
1051
1052         return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1053 }
1054
1055 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1056                                    struct gfs2_ea_location *el)
1057 {
1058         if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1059                 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1060                 gfs2_assert_withdraw(ip->i_sbd,
1061                                      GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1062         }
1063
1064         return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1065 }
1066
1067 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1068 {
1069         struct gfs2_ea_location el;
1070         int error;
1071
1072         if (!ip->i_di.di_eattr) {
1073                 if (er->er_flags & XATTR_REPLACE)
1074                         return -ENODATA;
1075                 return ea_init(ip, er);
1076         }
1077
1078         error = gfs2_ea_find(ip, er, &el);
1079         if (error)
1080                 return error;
1081
1082         if (el.el_ea) {
1083                 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1084                         brelse(el.el_bh);
1085                         return -EPERM;
1086                 }
1087
1088                 error = -EEXIST;
1089                 if (!(er->er_flags & XATTR_CREATE)) {
1090                         int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1091                         error = ea_set_i(ip, er, &el);
1092                         if (!error && unstuffed)
1093                                 ea_set_remove_unstuffed(ip, &el);
1094                 }
1095
1096                 brelse(el.el_bh);
1097         } else {
1098                 error = -ENODATA;
1099                 if (!(er->er_flags & XATTR_REPLACE))
1100                         error = ea_set_i(ip, er, NULL);
1101         }
1102
1103         return error;
1104 }
1105
1106 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1107 {
1108         struct gfs2_holder i_gh;
1109         int error;
1110
1111         if (!er->er_name_len ||
1112             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1113                 return -EINVAL;
1114         if (!er->er_data || !er->er_data_len) {
1115                 er->er_data = NULL;
1116                 er->er_data_len = 0;
1117         }
1118         error = ea_check_size(ip->i_sbd, er);
1119         if (error)
1120                 return error;
1121
1122         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1123         if (error)
1124                 return error;
1125
1126         if (IS_IMMUTABLE(ip->i_vnode))
1127                 error = -EPERM;
1128         else
1129                 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1130
1131         gfs2_glock_dq_uninit(&i_gh);
1132
1133         return error;
1134 }
1135
1136 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1137 {
1138         struct gfs2_ea_header *ea = el->el_ea;
1139         struct gfs2_ea_header *prev = el->el_prev;
1140         struct buffer_head *dibh;
1141         int error;
1142
1143         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1144         if (error)
1145                 return error;
1146
1147         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1148
1149         if (prev) {
1150                 uint32_t len;
1151
1152                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1153                 prev->ea_rec_len = cpu_to_be32(len);
1154
1155                 if (GFS2_EA_IS_LAST(ea))
1156                         prev->ea_flags |= GFS2_EAFLAG_LAST;
1157         } else
1158                 ea->ea_type = GFS2_EATYPE_UNUSED;
1159
1160         error = gfs2_meta_inode_buffer(ip, &dibh);
1161         if (!error) {
1162                 ip->i_di.di_ctime = get_seconds();
1163                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1164                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1165                 brelse(dibh);
1166         }
1167
1168         gfs2_trans_end(ip->i_sbd);
1169
1170         return error;
1171 }
1172
1173 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1174 {
1175         struct gfs2_ea_location el;
1176         int error;
1177
1178         if (!ip->i_di.di_eattr)
1179                 return -ENODATA;
1180
1181         error = gfs2_ea_find(ip, er, &el);
1182         if (error)
1183                 return error;
1184         if (!el.el_ea)
1185                 return -ENODATA;
1186
1187         if (GFS2_EA_IS_STUFFED(el.el_ea))
1188                 error = ea_remove_stuffed(ip, &el);
1189         else
1190                 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1191                                             0);
1192
1193         brelse(el.el_bh);
1194
1195         return error;
1196 }
1197
1198 /**
1199  * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1200  * @ip: pointer to the inode of the target file
1201  * @er: request information
1202  *
1203  * Returns: errno
1204  */
1205
1206 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1207 {
1208         struct gfs2_holder i_gh;
1209         int error;
1210
1211         if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1212                 return -EINVAL;
1213
1214         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1215         if (error)
1216                 return error;
1217
1218         if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1219                 error = -EPERM;
1220         else
1221                 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1222
1223         gfs2_glock_dq_uninit(&i_gh);
1224
1225         return error;
1226 }
1227
1228 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1229                                   struct gfs2_ea_header *ea, char *data)
1230 {
1231         struct gfs2_sbd *sdp = ip->i_sbd;
1232         struct buffer_head **bh;
1233         unsigned int amount = GFS2_EA_DATA_LEN(ea);
1234         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1235         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1236         unsigned int x;
1237         int error;
1238
1239         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1240         if (!bh)
1241                 return -ENOMEM;
1242
1243         error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1244         if (error)
1245                 goto out;
1246
1247         for (x = 0; x < nptrs; x++) {
1248                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1249                                        DIO_START, bh + x);
1250                 if (error) {
1251                         while (x--)
1252                                 brelse(bh[x]);
1253                         goto fail;
1254                 }
1255                 dataptrs++;
1256         }
1257
1258         for (x = 0; x < nptrs; x++) {
1259                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1260                 if (error) {
1261                         for (; x < nptrs; x++)
1262                                 brelse(bh[x]);
1263                         goto fail;
1264                 }
1265                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1266                         for (; x < nptrs; x++)
1267                                 brelse(bh[x]);
1268                         error = -EIO;
1269                         goto fail;
1270                 }
1271
1272                 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1273
1274                 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1275                        data,
1276                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1277
1278                 amount -= sdp->sd_jbsize;
1279                 data += sdp->sd_jbsize;
1280
1281                 brelse(bh[x]);
1282         }
1283
1284  out:
1285         kfree(bh);
1286
1287         return error;
1288
1289  fail:
1290         gfs2_trans_end(sdp);
1291         kfree(bh);
1292
1293         return error;
1294 }
1295
1296 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1297                       struct iattr *attr, char *data)
1298 {
1299         struct buffer_head *dibh;
1300         int error;
1301
1302         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1303                 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1304                 if (error)
1305                         return error;
1306
1307                 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1308                 memcpy(GFS2_EA2DATA(el->el_ea),
1309                        data,
1310                        GFS2_EA_DATA_LEN(el->el_ea));
1311         } else
1312                 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1313
1314         if (error)
1315                 return error;
1316
1317         error = gfs2_meta_inode_buffer(ip, &dibh);
1318         if (!error) {
1319                 error = inode_setattr(ip->i_vnode, attr);
1320                 gfs2_assert_warn(ip->i_sbd, !error);
1321                 gfs2_inode_attr_out(ip);
1322                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1323                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1324                 brelse(dibh);
1325         }
1326
1327         gfs2_trans_end(ip->i_sbd);
1328
1329         return error;
1330 }
1331
1332 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1333 {
1334         struct gfs2_sbd *sdp = ip->i_sbd;
1335         struct gfs2_rgrp_list rlist;
1336         struct buffer_head *indbh, *dibh;
1337         uint64_t *eablk, *end;
1338         unsigned int rg_blocks = 0;
1339         uint64_t bstart = 0;
1340         unsigned int blen = 0;
1341         unsigned int blks = 0;
1342         unsigned int x;
1343         int error;
1344
1345         memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1346
1347         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1348                                DIO_START | DIO_WAIT, &indbh);
1349         if (error)
1350                 return error;
1351
1352         if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1353                 error = -EIO;
1354                 goto out;
1355         }
1356
1357         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1358         end = eablk + sdp->sd_inptrs;
1359
1360         for (; eablk < end; eablk++) {
1361                 uint64_t bn;
1362
1363                 if (!*eablk)
1364                         break;
1365                 bn = be64_to_cpu(*eablk);
1366
1367                 if (bstart + blen == bn)
1368                         blen++;
1369                 else {
1370                         if (bstart)
1371                                 gfs2_rlist_add(sdp, &rlist, bstart);
1372                         bstart = bn;
1373                         blen = 1;
1374                 }
1375                 blks++;
1376         }
1377         if (bstart)
1378                 gfs2_rlist_add(sdp, &rlist, bstart);
1379         else
1380                 goto out;
1381
1382         gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1383
1384         for (x = 0; x < rlist.rl_rgrps; x++) {
1385                 struct gfs2_rgrpd *rgd;
1386                 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1387                 rg_blocks += rgd->rd_ri.ri_length;
1388         }
1389
1390         error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1391         if (error)
1392                 goto out_rlist_free;
1393
1394         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1395                                  RES_INDIRECT + RES_STATFS +
1396                                  RES_QUOTA, blks);
1397         if (error)
1398                 goto out_gunlock;
1399
1400         gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1401
1402         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1403         bstart = 0;
1404         blen = 0;
1405
1406         for (; eablk < end; eablk++) {
1407                 uint64_t bn;
1408
1409                 if (!*eablk)
1410                         break;
1411                 bn = be64_to_cpu(*eablk);
1412
1413                 if (bstart + blen == bn)
1414                         blen++;
1415                 else {
1416                         if (bstart)
1417                                 gfs2_free_meta(ip, bstart, blen);
1418                         bstart = bn;
1419                         blen = 1;
1420                 }
1421
1422                 *eablk = 0;
1423                 if (!ip->i_di.di_blocks)
1424                         gfs2_consist_inode(ip);
1425                 ip->i_di.di_blocks--;
1426         }
1427         if (bstart)
1428                 gfs2_free_meta(ip, bstart, blen);
1429
1430         ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1431
1432         error = gfs2_meta_inode_buffer(ip, &dibh);
1433         if (!error) {
1434                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1435                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1436                 brelse(dibh);
1437         }
1438
1439         gfs2_trans_end(sdp);
1440
1441  out_gunlock:
1442         gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1443
1444  out_rlist_free:
1445         gfs2_rlist_free(&rlist);
1446
1447  out:
1448         brelse(indbh);
1449
1450         return error;
1451 }
1452
1453 static int ea_dealloc_block(struct gfs2_inode *ip)
1454 {
1455         struct gfs2_sbd *sdp = ip->i_sbd;
1456         struct gfs2_alloc *al = &ip->i_alloc;
1457         struct gfs2_rgrpd *rgd;
1458         struct buffer_head *dibh;
1459         int error;
1460
1461         rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1462         if (!rgd) {
1463                 gfs2_consist_inode(ip);
1464                 return -EIO;
1465         }
1466
1467         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1468                                    &al->al_rgd_gh);
1469         if (error)
1470                 return error;
1471
1472         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1473                                  RES_STATFS + RES_QUOTA, 1);
1474         if (error)
1475                 goto out_gunlock;
1476
1477         gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1478
1479         ip->i_di.di_eattr = 0;
1480         if (!ip->i_di.di_blocks)
1481                 gfs2_consist_inode(ip);
1482         ip->i_di.di_blocks--;
1483
1484         error = gfs2_meta_inode_buffer(ip, &dibh);
1485         if (!error) {
1486                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1487                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1488                 brelse(dibh);
1489         }
1490
1491         gfs2_trans_end(sdp);
1492
1493  out_gunlock:
1494         gfs2_glock_dq_uninit(&al->al_rgd_gh);
1495
1496         return error;
1497 }
1498
1499 /**
1500  * gfs2_ea_dealloc - deallocate the extended attribute fork
1501  * @ip: the inode
1502  *
1503  * Returns: errno
1504  */
1505
1506 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1507 {
1508         struct gfs2_alloc *al;
1509         int error;
1510
1511         al = gfs2_alloc_get(ip);
1512
1513         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1514         if (error)
1515                 goto out_alloc;
1516
1517         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1518         if (error)
1519                 goto out_quota;
1520
1521         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1522         if (error)
1523                 goto out_rindex;
1524
1525         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1526                 error = ea_dealloc_indirect(ip);
1527                 if (error)
1528                         goto out_rindex;
1529         }
1530
1531         error = ea_dealloc_block(ip);
1532
1533  out_rindex:
1534         gfs2_glock_dq_uninit(&al->al_ri_gh);
1535
1536  out_quota:
1537         gfs2_quota_unhold(ip);
1538
1539  out_alloc:
1540         gfs2_alloc_put(ip);
1541
1542         return error;
1543 }
1544