fs/gfs2/xattr.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License version 2.
   8  */
   9
  10 #include <linux/slab.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/completion.h>
  13 #include <linux/buffer_head.h>
  14 #include <linux/xattr.h>
  15 #include <linux/gfs2_ondisk.h>
  16 #include <asm/uaccess.h>
  17
  18 #include "gfs2.h"
  19 #include "incore.h"
  20 #include "acl.h"
  21 #include "xattr.h"
  22 #include "glock.h"
  23 #include "inode.h"
  24 #include "meta_io.h"
  25 #include "quota.h"
  26 #include "rgrp.h"
  27 #include "trans.h"
  28 #include "util.h"
  29
  30 /**
  31  * ea_calc_size - returns the acutal number of bytes the request will take up
  32  *                (not counting any unstuffed data blocks)
  33  * @sdp:
  34  * @er:
  35  * @size:
  36  *
  37  * Returns: 1 if the EA should be stuffed
  38  */
  39
  40 static int ea_calc_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize,
  41                         unsigned int *size)
  42 {
  43         unsigned int jbsize = sdp->sd_jbsize;
  44
  45         /* Stuffed */
  46         *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize + dsize, 8);
  47
  48         if (*size <= jbsize)
  49                 return 1;
  50
  51         /* Unstuffed */
  52         *size = ALIGN(sizeof(struct gfs2_ea_header) + nsize +
  53                       (sizeof(__be64) * DIV_ROUND_UP(dsize, jbsize)), 8);
  54
  55         return 0;
  56 }
  57
  58 static int ea_check_size(struct gfs2_sbd *sdp, unsigned int nsize, size_t dsize)
  59 {
  60         unsigned int size;
  61
  62         if (dsize > GFS2_EA_MAX_DATA_LEN)
  63                 return -ERANGE;
  64
  65         ea_calc_size(sdp, nsize, dsize, &size);
  66
  67         /* This can only happen with 512 byte blocks */
  68         if (size > sdp->sd_jbsize)
  69                 return -ERANGE;
  70
  71         return 0;
  72 }
  73
  74 typedef int (*ea_call_t) (struct gfs2_inode *ip, struct buffer_head *bh,
  75                           struct gfs2_ea_header *ea,
  76                           struct gfs2_ea_header *prev, 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(GFS2_SB(&ip->i_inode), 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 && (char *)GFS2_EA2NEXT(ea) <=
  91                                                   bh->b_data + bh->b_size))
  92                         goto fail;
  93                 if (!GFS2_EATYPE_VALID(ea->ea_type))
  94                         goto fail;
  95
  96                 error = ea_call(ip, bh, ea, prev, data);
  97                 if (error)
  98                         return error;
  99
 100                 if (GFS2_EA_IS_LAST(ea)) {
 101                         if ((char *)GFS2_EA2NEXT(ea) !=
 102                             bh->b_data + bh->b_size)
 103                                 goto fail;
 104                         break;
 105                 }
 106         }
 107
 108         return error;
 109
 110 fail:
 111         gfs2_consist_inode(ip);
 112         return -EIO;
 113 }
 114
 115 static int ea_foreach(struct gfs2_inode *ip, ea_call_t ea_call, void *data)
 116 {
 117         struct buffer_head *bh, *eabh;
 118         __be64 *eablk, *end;
 119         int error;
 120
 121         error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &bh);
 122         if (error)
 123                 return error;
 124
 125         if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT)) {
 126                 error = ea_foreach_i(ip, bh, ea_call, data);
 127                 goto out;
 128         }
 129
 130         if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), bh, GFS2_METATYPE_IN)) {
 131                 error = -EIO;
 132                 goto out;
 133         }
 134
 135         eablk = (__be64 *)(bh->b_data + sizeof(struct gfs2_meta_header));
 136         end = eablk + GFS2_SB(&ip->i_inode)->sd_inptrs;
 137
 138         for (; eablk < end; eablk++) {
 139                 u64 bn;
 140
 141                 if (!*eablk)
 142                         break;
 143                 bn = be64_to_cpu(*eablk);
 144
 145                 error = gfs2_meta_read(ip->i_gl, bn, DIO_WAIT, &eabh);
 146                 if (error)
 147                         break;
 148                 error = ea_foreach_i(ip, eabh, ea_call, data);
 149                 brelse(eabh);
 150                 if (error)
 151                         break;
 152         }
 153 out:
 154         brelse(bh);
 155         return error;
 156 }
 157
 158 struct ea_find {
 159         int type;
 160         const char *name;
 161         size_t namel;
 162         struct gfs2_ea_location *ef_el;
 163 };
 164
 165 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
 166                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 167                      void *private)
 168 {
 169         struct ea_find *ef = private;
 170
 171         if (ea->ea_type == GFS2_EATYPE_UNUSED)
 172                 return 0;
 173
 174         if (ea->ea_type == ef->type) {
 175                 if (ea->ea_name_len == ef->namel &&
 176                     !memcmp(GFS2_EA2NAME(ea), ef->name, ea->ea_name_len)) {
 177                         struct gfs2_ea_location *el = ef->ef_el;
 178                         get_bh(bh);
 179                         el->el_bh = bh;
 180                         el->el_ea = ea;
 181                         el->el_prev = prev;
 182                         return 1;
 183                 }
 184         }
 185
 186         return 0;
 187 }
 188
 189 static int gfs2_ea_find(struct gfs2_inode *ip, int type, const char *name,
 190                         struct gfs2_ea_location *el)
 191 {
 192         struct ea_find ef;
 193         int error;
 194
 195         ef.type = type;
 196         ef.name = name;
 197         ef.namel = strlen(name);
 198         ef.ef_el = el;
 199
 200         memset(el, 0, sizeof(struct gfs2_ea_location));
 201
 202         error = ea_foreach(ip, ea_find_i, &ef);
 203         if (error > 0)
 204                 return 0;
 205
 206         return error;
 207 }
 208
 209 /**
 210  * ea_dealloc_unstuffed -
 211  * @ip:
 212  * @bh:
 213  * @ea:
 214  * @prev:
 215  * @private:
 216  *
 217  * Take advantage of the fact that all unstuffed blocks are
 218  * allocated from the same RG.  But watch, this may not always
 219  * be true.
 220  *
 221  * Returns: errno
 222  */
 223
 224 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 225                                 struct gfs2_ea_header *ea,
 226                                 struct gfs2_ea_header *prev, void *private)
 227 {
 228         int *leave = private;
 229         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 230         struct gfs2_rgrpd *rgd;
 231         struct gfs2_holder rg_gh;
 232         struct buffer_head *dibh;
 233         __be64 *dataptrs;
 234         u64 bn = 0;
 235         u64 bstart = 0;
 236         unsigned int blen = 0;
 237         unsigned int blks = 0;
 238         unsigned int x;
 239         int error;
 240
 241         error = gfs2_rindex_update(sdp);
 242         if (error)
 243                 return error;
 244
 245         if (GFS2_EA_IS_STUFFED(ea))
 246                 return 0;
 247
 248         dataptrs = GFS2_EA2DATAPTRS(ea);
 249         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
 250                 if (*dataptrs) {
 251                         blks++;
 252                         bn = be64_to_cpu(*dataptrs);
 253                 }
 254         }
 255         if (!blks)
 256                 return 0;
 257
 258         rgd = gfs2_blk2rgrpd(sdp, bn, 1);
 259         if (!rgd) {
 260                 gfs2_consist_inode(ip);
 261                 return -EIO;
 262         }
 263
 264         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
 265         if (error)
 266                 return error;
 267
 268         error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
 269                                  RES_EATTR + RES_STATFS + RES_QUOTA, blks);
 270         if (error)
 271                 goto out_gunlock;
 272
 273         gfs2_trans_add_meta(ip->i_gl, bh);
 274
 275         dataptrs = GFS2_EA2DATAPTRS(ea);
 276         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
 277                 if (!*dataptrs)
 278                         break;
 279                 bn = be64_to_cpu(*dataptrs);
 280
 281                 if (bstart + blen == bn)
 282                         blen++;
 283                 else {
 284                         if (bstart)
 285                                 gfs2_free_meta(ip, bstart, blen);
 286                         bstart = bn;
 287                         blen = 1;
 288                 }
 289
 290                 *dataptrs = 0;
 291                 gfs2_add_inode_blocks(&ip->i_inode, -1);
 292         }
 293         if (bstart)
 294                 gfs2_free_meta(ip, bstart, blen);
 295
 296         if (prev && !leave) {
 297                 u32 len;
 298
 299                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 300                 prev->ea_rec_len = cpu_to_be32(len);
 301
 302                 if (GFS2_EA_IS_LAST(ea))
 303                         prev->ea_flags |= GFS2_EAFLAG_LAST;
 304         } else {
 305                 ea->ea_type = GFS2_EATYPE_UNUSED;
 306                 ea->ea_num_ptrs = 0;
 307         }
 308
 309         error = gfs2_meta_inode_buffer(ip, &dibh);
 310         if (!error) {
 311                 ip->i_inode.i_ctime = CURRENT_TIME;
 312                 gfs2_trans_add_meta(ip->i_gl, dibh);
 313                 gfs2_dinode_out(ip, dibh->b_data);
 314                 brelse(dibh);
 315         }
 316
 317         gfs2_trans_end(sdp);
 318
 319 out_gunlock:
 320         gfs2_glock_dq_uninit(&rg_gh);
 321         return error;
 322 }
 323
 324 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 325                                struct gfs2_ea_header *ea,
 326                                struct gfs2_ea_header *prev, int leave)
 327 {
 328         int error;
 329
 330         error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
 331         if (error)
 332                 return error;
 333
 334         error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
 335         if (error)
 336                 goto out_alloc;
 337
 338         error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
 339
 340         gfs2_quota_unhold(ip);
 341 out_alloc:
 342         return error;
 343 }
 344
 345 struct ea_list {
 346         struct gfs2_ea_request *ei_er;
 347         unsigned int ei_size;
 348 };
 349
 350 static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
 351 {
 352         switch (ea->ea_type) {
 353         case GFS2_EATYPE_USR:
 354                 return 5 + ea->ea_name_len + 1;
 355         case GFS2_EATYPE_SYS:
 356                 return 7 + ea->ea_name_len + 1;
 357         case GFS2_EATYPE_SECURITY:
 358                 return 9 + ea->ea_name_len + 1;
 359         default:
 360                 return 0;
 361         }
 362 }
 363
 364 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
 365                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 366                      void *private)
 367 {
 368         struct ea_list *ei = private;
 369         struct gfs2_ea_request *er = ei->ei_er;
 370         unsigned int ea_size = gfs2_ea_strlen(ea);
 371
 372         if (ea->ea_type == GFS2_EATYPE_UNUSED)
 373                 return 0;
 374
 375         if (er->er_data_len) {
 376                 char *prefix = NULL;
 377                 unsigned int l = 0;
 378                 char c = 0;
 379
 380                 if (ei->ei_size + ea_size > er->er_data_len)
 381                         return -ERANGE;
 382
 383                 switch (ea->ea_type) {
 384                 case GFS2_EATYPE_USR:
 385                         prefix = "user.";
 386                         l = 5;
 387                         break;
 388                 case GFS2_EATYPE_SYS:
 389                         prefix = "system.";
 390                         l = 7;
 391                         break;
 392                 case GFS2_EATYPE_SECURITY:
 393                         prefix = "security.";
 394                         l = 9;
 395                         break;
 396                 }
 397
 398                 BUG_ON(l == 0);
 399
 400                 memcpy(er->er_data + ei->ei_size, prefix, l);
 401                 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
 402                        ea->ea_name_len);
 403                 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
 404         }
 405
 406         ei->ei_size += ea_size;
 407
 408         return 0;
 409 }
 410
 411 /**
 412  * gfs2_listxattr - List gfs2 extended attributes
 413  * @dentry: The dentry whose inode we are interested in
 414  * @buffer: The buffer to write the results
 415  * @size: The size of the buffer
 416  *
 417  * Returns: actual size of data on success, -errno on error
 418  */
 419
 420 ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
 421 {
 422         struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
 423         struct gfs2_ea_request er;
 424         struct gfs2_holder i_gh;
 425         int error;
 426
 427         memset(&er, 0, sizeof(struct gfs2_ea_request));
 428         if (size) {
 429                 er.er_data = buffer;
 430                 er.er_data_len = size;
 431         }
 432
 433         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
 434         if (error)
 435                 return error;
 436
 437         if (ip->i_eattr) {
 438                 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
 439
 440                 error = ea_foreach(ip, ea_list_i, &ei);
 441                 if (!error)
 442                         error = ei.ei_size;
 443         }
 444
 445         gfs2_glock_dq_uninit(&i_gh);
 446
 447         return error;
 448 }
 449
 450 /**
 451  * ea_iter_unstuffed - copies the unstuffed xattr data to/from the
 452  *                     request buffer
 453  * @ip: The GFS2 inode
 454  * @ea: The extended attribute header structure
 455  * @din: The data to be copied in
 456  * @dout: The data to be copied out (one of din,dout will be NULL)
 457  *
 458  * Returns: errno
 459  */
 460
 461 static int gfs2_iter_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 462                                const char *din, char *dout)
 463 {
 464         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 465         struct buffer_head **bh;
 466         unsigned int amount = GFS2_EA_DATA_LEN(ea);
 467         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
 468         __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
 469         unsigned int x;
 470         int error = 0;
 471         unsigned char *pos;
 472         unsigned cp_size;
 473
 474         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
 475         if (!bh)
 476                 return -ENOMEM;
 477
 478         for (x = 0; x < nptrs; x++) {
 479                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
 480                                        bh + x);
 481                 if (error) {
 482                         while (x--)
 483                                 brelse(bh[x]);
 484                         goto out;
 485                 }
 486                 dataptrs++;
 487         }
 488
 489         for (x = 0; x < nptrs; x++) {
 490                 error = gfs2_meta_wait(sdp, bh[x]);
 491                 if (error) {
 492                         for (; x < nptrs; x++)
 493                                 brelse(bh[x]);
 494                         goto out;
 495                 }
 496                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
 497                         for (; x < nptrs; x++)
 498                                 brelse(bh[x]);
 499                         error = -EIO;
 500                         goto out;
 501                 }
 502
 503                 pos = bh[x]->b_data + sizeof(struct gfs2_meta_header);
 504                 cp_size = (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize;
 505
 506                 if (dout) {
 507                         memcpy(dout, pos, cp_size);
 508                         dout += sdp->sd_jbsize;
 509                 }
 510
 511                 if (din) {
 512                         gfs2_trans_add_meta(ip->i_gl, bh[x]);
 513                         memcpy(pos, din, cp_size);
 514                         din += sdp->sd_jbsize;
 515                 }
 516
 517                 amount -= sdp->sd_jbsize;
 518                 brelse(bh[x]);
 519         }
 520
 521 out:
 522         kfree(bh);
 523         return error;
 524 }
 525
 526 static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
 527                             char *data, size_t size)
 528 {
 529         int ret;
 530         size_t len = GFS2_EA_DATA_LEN(el->el_ea);
 531         if (len > size)
 532                 return -ERANGE;
 533
 534         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
 535                 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
 536                 return len;
 537         }
 538         ret = gfs2_iter_unstuffed(ip, el->el_ea, NULL, data);
 539         if (ret < 0)
 540                 return ret;
 541         return len;
 542 }
 543
 544 int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
 545 {
 546         struct gfs2_ea_location el;
 547         int error;
 548         int len;
 549         char *data;
 550
 551         error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
 552         if (error)
 553                 return error;
 554         if (!el.el_ea)
 555                 goto out;
 556         if (!GFS2_EA_DATA_LEN(el.el_ea))
 557                 goto out;
 558
 559         len = GFS2_EA_DATA_LEN(el.el_ea);
 560         data = kmalloc(len, GFP_NOFS);
 561         error = -ENOMEM;
 562         if (data == NULL)
 563                 goto out;
 564
 565         error = gfs2_ea_get_copy(ip, &el, data, len);
 566         if (error < 0)
 567                 kfree(data);
 568         else
 569                 *ppdata = data;
 570 out:
 571         brelse(el.el_bh);
 572         return error;
 573 }
 574
 575 /**
 576  * gfs2_xattr_get - Get a GFS2 extended attribute
 577  * @inode: The inode
 578  * @name: The name of the extended attribute
 579  * @buffer: The buffer to write the result into
 580  * @size: The size of the buffer
 581  * @type: The type of extended attribute
 582  *
 583  * Returns: actual size of data on success, -errno on error
 584  */
 585 static int gfs2_xattr_get(struct dentry *dentry, const char *name,
 586                 void *buffer, size_t size, int type)
 587 {
 588         struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
 589         struct gfs2_ea_location el;
 590         int error;
 591
 592         if (!ip->i_eattr)
 593                 return -ENODATA;
 594         if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
 595                 return -EINVAL;
 596
 597         error = gfs2_ea_find(ip, type, name, &el);
 598         if (error)
 599                 return error;
 600         if (!el.el_ea)
 601                 return -ENODATA;
 602         if (size)
 603                 error = gfs2_ea_get_copy(ip, &el, buffer, size);
 604         else
 605                 error = GFS2_EA_DATA_LEN(el.el_ea);
 606         brelse(el.el_bh);
 607
 608         return error;
 609 }
 610
 611 /**
 612  * ea_alloc_blk - allocates a new block for extended attributes.
 613  * @ip: A pointer to the inode that's getting extended attributes
 614  * @bhp: Pointer to pointer to a struct buffer_head
 615  *
 616  * Returns: errno
 617  */
 618
 619 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
 620 {
 621         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 622         struct gfs2_ea_header *ea;
 623         unsigned int n = 1;
 624         u64 block;
 625         int error;
 626
 627         error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
 628         if (error)
 629                 return error;
 630         gfs2_trans_add_unrevoke(sdp, block, 1);
 631         *bhp = gfs2_meta_new(ip->i_gl, block);
 632         gfs2_trans_add_meta(ip->i_gl, *bhp);
 633         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
 634         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
 635
 636         ea = GFS2_EA_BH2FIRST(*bhp);
 637         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
 638         ea->ea_type = GFS2_EATYPE_UNUSED;
 639         ea->ea_flags = GFS2_EAFLAG_LAST;
 640         ea->ea_num_ptrs = 0;
 641
 642         gfs2_add_inode_blocks(&ip->i_inode, 1);
 643
 644         return 0;
 645 }
 646
 647 /**
 648  * ea_write - writes the request info to an ea, creating new blocks if
 649  *            necessary
 650  * @ip: inode that is being modified
 651  * @ea: the location of the new ea in a block
 652  * @er: the write request
 653  *
 654  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
 655  *
 656  * returns : errno
 657  */
 658
 659 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 660                     struct gfs2_ea_request *er)
 661 {
 662         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 663         int error;
 664
 665         ea->ea_data_len = cpu_to_be32(er->er_data_len);
 666         ea->ea_name_len = er->er_name_len;
 667         ea->ea_type = er->er_type;
 668         ea->__pad = 0;
 669
 670         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
 671
 672         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
 673                 ea->ea_num_ptrs = 0;
 674                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
 675         } else {
 676                 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
 677                 const char *data = er->er_data;
 678                 unsigned int data_len = er->er_data_len;
 679                 unsigned int copy;
 680                 unsigned int x;
 681
 682                 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
 683                 for (x = 0; x < ea->ea_num_ptrs; x++) {
 684                         struct buffer_head *bh;
 685                         u64 block;
 686                         int mh_size = sizeof(struct gfs2_meta_header);
 687                         unsigned int n = 1;
 688
 689                         error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
 690                         if (error)
 691                                 return error;
 692                         gfs2_trans_add_unrevoke(sdp, block, 1);
 693                         bh = gfs2_meta_new(ip->i_gl, block);
 694                         gfs2_trans_add_meta(ip->i_gl, bh);
 695                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
 696
 697                         gfs2_add_inode_blocks(&ip->i_inode, 1);
 698
 699                         copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
 700                                                            data_len;
 701                         memcpy(bh->b_data + mh_size, data, copy);
 702                         if (copy < sdp->sd_jbsize)
 703                                 memset(bh->b_data + mh_size + copy, 0,
 704                                        sdp->sd_jbsize - copy);
 705
 706                         *dataptr++ = cpu_to_be64(bh->b_blocknr);
 707                         data += copy;
 708                         data_len -= copy;
 709
 710                         brelse(bh);
 711                 }
 712
 713                 gfs2_assert_withdraw(sdp, !data_len);
 714         }
 715
 716         return 0;
 717 }
 718
 719 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
 720                                    struct gfs2_ea_request *er, void *private);
 721
 722 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 723                              unsigned int blks,
 724                              ea_skeleton_call_t skeleton_call, void *private)
 725 {
 726         struct buffer_head *dibh;
 727         int error;
 728
 729         error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
 730         if (error)
 731                 return error;
 732
 733         error = gfs2_quota_lock_check(ip);
 734         if (error)
 735                 return error;
 736
 737         error = gfs2_inplace_reserve(ip, blks, 0);
 738         if (error)
 739                 goto out_gunlock_q;
 740
 741         error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
 742                                  blks + gfs2_rg_blocks(ip, blks) +
 743                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
 744         if (error)
 745                 goto out_ipres;
 746
 747         error = skeleton_call(ip, er, private);
 748         if (error)
 749                 goto out_end_trans;
 750
 751         error = gfs2_meta_inode_buffer(ip, &dibh);
 752         if (!error) {
 753                 ip->i_inode.i_ctime = CURRENT_TIME;
 754                 gfs2_trans_add_meta(ip->i_gl, dibh);
 755                 gfs2_dinode_out(ip, dibh->b_data);
 756                 brelse(dibh);
 757         }
 758
 759 out_end_trans:
 760         gfs2_trans_end(GFS2_SB(&ip->i_inode));
 761 out_ipres:
 762         gfs2_inplace_release(ip);
 763 out_gunlock_q:
 764         gfs2_quota_unlock(ip);
 765         return error;
 766 }
 767
 768 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 769                      void *private)
 770 {
 771         struct buffer_head *bh;
 772         int error;
 773
 774         error = ea_alloc_blk(ip, &bh);
 775         if (error)
 776                 return error;
 777
 778         ip->i_eattr = bh->b_blocknr;
 779         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
 780
 781         brelse(bh);
 782
 783         return error;
 784 }
 785
 786 /**
 787  * ea_init - initializes a new eattr block
 788  * @ip:
 789  * @er:
 790  *
 791  * Returns: errno
 792  */
 793
 794 static int ea_init(struct gfs2_inode *ip, int type, const char *name,
 795                    const void *data, size_t size)
 796 {
 797         struct gfs2_ea_request er;
 798         unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
 799         unsigned int blks = 1;
 800
 801         er.er_type = type;
 802         er.er_name = name;
 803         er.er_name_len = strlen(name);
 804         er.er_data = (void *)data;
 805         er.er_data_len = size;
 806
 807         if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
 808                 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
 809
 810         return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
 811 }
 812
 813 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
 814 {
 815         u32 ea_size = GFS2_EA_SIZE(ea);
 816         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
 817                                      ea_size);
 818         u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
 819         int last = ea->ea_flags & GFS2_EAFLAG_LAST;
 820
 821         ea->ea_rec_len = cpu_to_be32(ea_size);
 822         ea->ea_flags ^= last;
 823
 824         new->ea_rec_len = cpu_to_be32(new_size);
 825         new->ea_flags = last;
 826
 827         return new;
 828 }
 829
 830 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
 831                                   struct gfs2_ea_location *el)
 832 {
 833         struct gfs2_ea_header *ea = el->el_ea;
 834         struct gfs2_ea_header *prev = el->el_prev;
 835         u32 len;
 836
 837         gfs2_trans_add_meta(ip->i_gl, el->el_bh);
 838
 839         if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
 840                 ea->ea_type = GFS2_EATYPE_UNUSED;
 841                 return;
 842         } else if (GFS2_EA2NEXT(prev) != ea) {
 843                 prev = GFS2_EA2NEXT(prev);
 844                 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
 845         }
 846
 847         len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 848         prev->ea_rec_len = cpu_to_be32(len);
 849
 850         if (GFS2_EA_IS_LAST(ea))
 851                 prev->ea_flags |= GFS2_EAFLAG_LAST;
 852 }
 853
 854 struct ea_set {
 855         int ea_split;
 856
 857         struct gfs2_ea_request *es_er;
 858         struct gfs2_ea_location *es_el;
 859
 860         struct buffer_head *es_bh;
 861         struct gfs2_ea_header *es_ea;
 862 };
 863
 864 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
 865                                  struct gfs2_ea_header *ea, struct ea_set *es)
 866 {
 867         struct gfs2_ea_request *er = es->es_er;
 868         struct buffer_head *dibh;
 869         int error;
 870
 871         error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
 872         if (error)
 873                 return error;
 874
 875         gfs2_trans_add_meta(ip->i_gl, bh);
 876
 877         if (es->ea_split)
 878                 ea = ea_split_ea(ea);
 879
 880         ea_write(ip, ea, er);
 881
 882         if (es->es_el)
 883                 ea_set_remove_stuffed(ip, es->es_el);
 884
 885         error = gfs2_meta_inode_buffer(ip, &dibh);
 886         if (error)
 887                 goto out;
 888         ip->i_inode.i_ctime = CURRENT_TIME;
 889         gfs2_trans_add_meta(ip->i_gl, dibh);
 890         gfs2_dinode_out(ip, dibh->b_data);
 891         brelse(dibh);
 892 out:
 893         gfs2_trans_end(GFS2_SB(&ip->i_inode));
 894         return error;
 895 }
 896
 897 static int ea_set_simple_alloc(struct gfs2_inode *ip,
 898                                struct gfs2_ea_request *er, void *private)
 899 {
 900         struct ea_set *es = private;
 901         struct gfs2_ea_header *ea = es->es_ea;
 902         int error;
 903
 904         gfs2_trans_add_meta(ip->i_gl, es->es_bh);
 905
 906         if (es->ea_split)
 907                 ea = ea_split_ea(ea);
 908
 909         error = ea_write(ip, ea, er);
 910         if (error)
 911                 return error;
 912
 913         if (es->es_el)
 914                 ea_set_remove_stuffed(ip, es->es_el);
 915
 916         return 0;
 917 }
 918
 919 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
 920                          struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 921                          void *private)
 922 {
 923         struct ea_set *es = private;
 924         unsigned int size;
 925         int stuffed;
 926         int error;
 927
 928         stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
 929                                es->es_er->er_data_len, &size);
 930
 931         if (ea->ea_type == GFS2_EATYPE_UNUSED) {
 932                 if (GFS2_EA_REC_LEN(ea) < size)
 933                         return 0;
 934                 if (!GFS2_EA_IS_STUFFED(ea)) {
 935                         error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
 936                         if (error)
 937                                 return error;
 938                 }
 939                 es->ea_split = 0;
 940         } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
 941                 es->ea_split = 1;
 942         else
 943                 return 0;
 944
 945         if (stuffed) {
 946                 error = ea_set_simple_noalloc(ip, bh, ea, es);
 947                 if (error)
 948                         return error;
 949         } else {
 950                 unsigned int blks;
 951
 952                 es->es_bh = bh;
 953                 es->es_ea = ea;
 954                 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
 955                                         GFS2_SB(&ip->i_inode)->sd_jbsize);
 956
 957                 error = ea_alloc_skeleton(ip, es->es_er, blks,
 958                                           ea_set_simple_alloc, es);
 959                 if (error)
 960                         return error;
 961         }
 962
 963         return 1;
 964 }
 965
 966 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 967                         void *private)
 968 {
 969         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 970         struct buffer_head *indbh, *newbh;
 971         __be64 *eablk;
 972         int error;
 973         int mh_size = sizeof(struct gfs2_meta_header);
 974
 975         if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
 976                 __be64 *end;
 977
 978                 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT,
 979                                        &indbh);
 980                 if (error)
 981                         return error;
 982
 983                 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
 984                         error = -EIO;
 985                         goto out;
 986                 }
 987
 988                 eablk = (__be64 *)(indbh->b_data + mh_size);
 989                 end = eablk + sdp->sd_inptrs;
 990
 991                 for (; eablk < end; eablk++)
 992                         if (!*eablk)
 993                                 break;
 994
 995                 if (eablk == end) {
 996                         error = -ENOSPC;
 997                         goto out;
 998                 }
 999
1000                 gfs2_trans_add_meta(ip->i_gl, indbh);
1001         } else {
1002                 u64 blk;
1003                 unsigned int n = 1;
1004                 error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
1005                 if (error)
1006                         return error;
1007                 gfs2_trans_add_unrevoke(sdp, blk, 1);
1008                 indbh = gfs2_meta_new(ip->i_gl, blk);
1009                 gfs2_trans_add_meta(ip->i_gl, indbh);
1010                 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1011                 gfs2_buffer_clear_tail(indbh, mh_size);
1012
1013                 eablk = (__be64 *)(indbh->b_data + mh_size);
1014                 *eablk = cpu_to_be64(ip->i_eattr);
1015                 ip->i_eattr = blk;
1016                 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
1017                 gfs2_add_inode_blocks(&ip->i_inode, 1);
1018
1019                 eablk++;
1020         }
1021
1022         error = ea_alloc_blk(ip, &newbh);
1023         if (error)
1024                 goto out;
1025
1026         *eablk = cpu_to_be64((u64)newbh->b_blocknr);
1027         error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1028         brelse(newbh);
1029         if (error)
1030                 goto out;
1031
1032         if (private)
1033                 ea_set_remove_stuffed(ip, private);
1034
1035 out:
1036         brelse(indbh);
1037         return error;
1038 }
1039
1040 static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1041                     const void *value, size_t size, struct gfs2_ea_location *el)
1042 {
1043         struct gfs2_ea_request er;
1044         struct ea_set es;
1045         unsigned int blks = 2;
1046         int error;
1047
1048         er.er_type = type;
1049         er.er_name = name;
1050         er.er_data = (void *)value;
1051         er.er_name_len = strlen(name);
1052         er.er_data_len = size;
1053
1054         memset(&es, 0, sizeof(struct ea_set));
1055         es.es_er = &er;
1056         es.es_el = el;
1057
1058         error = ea_foreach(ip, ea_set_simple, &es);
1059         if (error > 0)
1060                 return 0;
1061         if (error)
1062                 return error;
1063
1064         if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
1065                 blks++;
1066         if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1067                 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
1068
1069         return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
1070 }
1071
1072 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1073                                    struct gfs2_ea_location *el)
1074 {
1075         if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1076                 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1077                 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
1078                                      GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1079         }
1080
1081         return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
1082 }
1083
1084 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1085 {
1086         struct gfs2_ea_header *ea = el->el_ea;
1087         struct gfs2_ea_header *prev = el->el_prev;
1088         struct buffer_head *dibh;
1089         int error;
1090
1091         error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1092         if (error)
1093                 return error;
1094
1095         gfs2_trans_add_meta(ip->i_gl, el->el_bh);
1096
1097         if (prev) {
1098                 u32 len;
1099
1100                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1101                 prev->ea_rec_len = cpu_to_be32(len);
1102
1103                 if (GFS2_EA_IS_LAST(ea))
1104                         prev->ea_flags |= GFS2_EAFLAG_LAST;
1105         } else {
1106                 ea->ea_type = GFS2_EATYPE_UNUSED;
1107         }
1108
1109         error = gfs2_meta_inode_buffer(ip, &dibh);
1110         if (!error) {
1111                 ip->i_inode.i_ctime = CURRENT_TIME;
1112                 gfs2_trans_add_meta(ip->i_gl, dibh);
1113                 gfs2_dinode_out(ip, dibh->b_data);
1114                 brelse(dibh);
1115         }
1116
1117         gfs2_trans_end(GFS2_SB(&ip->i_inode));
1118
1119         return error;
1120 }
1121
1122 /**
1123  * gfs2_xattr_remove - Remove a GFS2 extended attribute
1124  * @ip: The inode
1125  * @type: The type of the extended attribute
1126  * @name: The name of the extended attribute
1127  *
1128  * This is not called directly by the VFS since we use the (common)
1129  * scheme of making a "set with NULL data" mean a remove request. Note
1130  * that this is different from a set with zero length data.
1131  *
1132  * Returns: 0, or errno on failure
1133  */
1134
1135 static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
1136 {
1137         struct gfs2_ea_location el;
1138         int error;
1139
1140         if (!ip->i_eattr)
1141                 return -ENODATA;
1142
1143         error = gfs2_ea_find(ip, type, name, &el);
1144         if (error)
1145                 return error;
1146         if (!el.el_ea)
1147                 return -ENODATA;
1148
1149         if (GFS2_EA_IS_STUFFED(el.el_ea))
1150                 error = ea_remove_stuffed(ip, &el);
1151         else
1152                 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
1153
1154         brelse(el.el_bh);
1155
1156         return error;
1157 }
1158
1159 /**
1160  * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1161  * @ip: The inode
1162  * @name: The name of the extended attribute
1163  * @value: The value of the extended attribute (NULL for remove)
1164  * @size: The size of the @value argument
1165  * @flags: Create or Replace
1166  * @type: The type of the extended attribute
1167  *
1168  * See gfs2_xattr_remove() for details of the removal of xattrs.
1169  *
1170  * Returns: 0 or errno on failure
1171  */
1172
1173 int __gfs2_xattr_set(struct inode *inode, const char *name,
1174                    const void *value, size_t size, int flags, int type)
1175 {
1176         struct gfs2_inode *ip = GFS2_I(inode);
1177         struct gfs2_sbd *sdp = GFS2_SB(inode);
1178         struct gfs2_ea_location el;
1179         unsigned int namel = strlen(name);
1180         int error;
1181
1182         if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1183                 return -EPERM;
1184         if (namel > GFS2_EA_MAX_NAME_LEN)
1185                 return -ERANGE;
1186
1187         if (value == NULL)
1188                 return gfs2_xattr_remove(ip, type, name);
1189
1190         if (ea_check_size(sdp, namel, size))
1191                 return -ERANGE;
1192
1193         if (!ip->i_eattr) {
1194                 if (flags & XATTR_REPLACE)
1195                         return -ENODATA;
1196                 return ea_init(ip, type, name, value, size);
1197         }
1198
1199         error = gfs2_ea_find(ip, type, name, &el);
1200         if (error)
1201                 return error;
1202
1203         if (el.el_ea) {
1204                 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1205                         brelse(el.el_bh);
1206                         return -EPERM;
1207                 }
1208
1209                 error = -EEXIST;
1210                 if (!(flags & XATTR_CREATE)) {
1211                         int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1212                         error = ea_set_i(ip, type, name, value, size, &el);
1213                         if (!error && unstuffed)
1214                                 ea_set_remove_unstuffed(ip, &el);
1215                 }
1216
1217                 brelse(el.el_bh);
1218                 return error;
1219         }
1220
1221         error = -ENODATA;
1222         if (!(flags & XATTR_REPLACE))
1223                 error = ea_set_i(ip, type, name, value, size, NULL);
1224
1225         return error;
1226 }
1227
1228 static int gfs2_xattr_set(struct dentry *dentry, const char *name,
1229                 const void *value, size_t size, int flags, int type)
1230 {
1231         return __gfs2_xattr_set(dentry->d_inode, name, value,
1232                                 size, flags, type);
1233 }
1234
1235
1236 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1237                                   struct gfs2_ea_header *ea, char *data)
1238 {
1239         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1240         unsigned int amount = GFS2_EA_DATA_LEN(ea);
1241         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1242         int ret;
1243
1244         ret = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1245         if (ret)
1246                 return ret;
1247
1248         ret = gfs2_iter_unstuffed(ip, ea, data, NULL);
1249         gfs2_trans_end(sdp);
1250
1251         return ret;
1252 }
1253
1254 int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
1255 {
1256         struct inode *inode = &ip->i_inode;
1257         struct gfs2_sbd *sdp = GFS2_SB(inode);
1258         struct gfs2_ea_location el;
1259         int error;
1260
1261         error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
1262         if (error)
1263                 return error;
1264
1265         if (GFS2_EA_IS_STUFFED(el.el_ea)) {
1266                 error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0);
1267                 if (error == 0) {
1268                         gfs2_trans_add_meta(ip->i_gl, el.el_bh);
1269                         memcpy(GFS2_EA2DATA(el.el_ea), data,
1270                                GFS2_EA_DATA_LEN(el.el_ea));
1271                 }
1272         } else {
1273                 error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);
1274         }
1275
1276         brelse(el.el_bh);
1277         if (error)
1278                 return error;
1279
1280         error = gfs2_setattr_simple(inode, attr);
1281         gfs2_trans_end(sdp);
1282         return error;
1283 }
1284
1285 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1286 {
1287         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1288         struct gfs2_rgrp_list rlist;
1289         struct buffer_head *indbh, *dibh;
1290         __be64 *eablk, *end;
1291         unsigned int rg_blocks = 0;
1292         u64 bstart = 0;
1293         unsigned int blen = 0;
1294         unsigned int blks = 0;
1295         unsigned int x;
1296         int error;
1297
1298         error = gfs2_rindex_update(sdp);
1299         if (error)
1300                 return error;
1301
1302         memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1303
1304         error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);
1305         if (error)
1306                 return error;
1307
1308         if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1309                 error = -EIO;
1310                 goto out;
1311         }
1312
1313         eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1314         end = eablk + sdp->sd_inptrs;
1315
1316         for (; eablk < end; eablk++) {
1317                 u64 bn;
1318
1319                 if (!*eablk)
1320                         break;
1321                 bn = be64_to_cpu(*eablk);
1322
1323                 if (bstart + blen == bn)
1324                         blen++;
1325                 else {
1326                         if (bstart)
1327                                 gfs2_rlist_add(ip, &rlist, bstart);
1328                         bstart = bn;
1329                         blen = 1;
1330                 }
1331                 blks++;
1332         }
1333         if (bstart)
1334                 gfs2_rlist_add(ip, &rlist, bstart);
1335         else
1336                 goto out;
1337
1338         gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
1339
1340         for (x = 0; x < rlist.rl_rgrps; x++) {
1341                 struct gfs2_rgrpd *rgd;
1342                 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1343                 rg_blocks += rgd->rd_length;
1344         }
1345
1346         error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1347         if (error)
1348                 goto out_rlist_free;
1349
1350         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1351                                  RES_STATFS + RES_QUOTA, blks);
1352         if (error)
1353                 goto out_gunlock;
1354
1355         gfs2_trans_add_meta(ip->i_gl, indbh);
1356
1357         eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1358         bstart = 0;
1359         blen = 0;
1360
1361         for (; eablk < end; eablk++) {
1362                 u64 bn;
1363
1364                 if (!*eablk)
1365                         break;
1366                 bn = be64_to_cpu(*eablk);
1367
1368                 if (bstart + blen == bn)
1369                         blen++;
1370                 else {
1371                         if (bstart)
1372                                 gfs2_free_meta(ip, bstart, blen);
1373                         bstart = bn;
1374                         blen = 1;
1375                 }
1376
1377                 *eablk = 0;
1378                 gfs2_add_inode_blocks(&ip->i_inode, -1);
1379         }
1380         if (bstart)
1381                 gfs2_free_meta(ip, bstart, blen);
1382
1383         ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
1384
1385         error = gfs2_meta_inode_buffer(ip, &dibh);
1386         if (!error) {
1387                 gfs2_trans_add_meta(ip->i_gl, dibh);
1388                 gfs2_dinode_out(ip, dibh->b_data);
1389                 brelse(dibh);
1390         }
1391
1392         gfs2_trans_end(sdp);
1393
1394 out_gunlock:
1395         gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1396 out_rlist_free:
1397         gfs2_rlist_free(&rlist);
1398 out:
1399         brelse(indbh);
1400         return error;
1401 }
1402
1403 static int ea_dealloc_block(struct gfs2_inode *ip)
1404 {
1405         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1406         struct gfs2_rgrpd *rgd;
1407         struct buffer_head *dibh;
1408         struct gfs2_holder gh;
1409         int error;
1410
1411         error = gfs2_rindex_update(sdp);
1412         if (error)
1413                 return error;
1414
1415         rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr, 1);
1416         if (!rgd) {
1417                 gfs2_consist_inode(ip);
1418                 return -EIO;
1419         }
1420
1421         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
1422         if (error)
1423                 return error;
1424
1425         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1426                                  RES_QUOTA, 1);
1427         if (error)
1428                 goto out_gunlock;
1429
1430         gfs2_free_meta(ip, ip->i_eattr, 1);
1431
1432         ip->i_eattr = 0;
1433         gfs2_add_inode_blocks(&ip->i_inode, -1);
1434
1435         error = gfs2_meta_inode_buffer(ip, &dibh);
1436         if (!error) {
1437                 gfs2_trans_add_meta(ip->i_gl, dibh);
1438                 gfs2_dinode_out(ip, dibh->b_data);
1439                 brelse(dibh);
1440         }
1441
1442         gfs2_trans_end(sdp);
1443
1444 out_gunlock:
1445         gfs2_glock_dq_uninit(&gh);
1446         return error;
1447 }
1448
1449 /**
1450  * gfs2_ea_dealloc - deallocate the extended attribute fork
1451  * @ip: the inode
1452  *
1453  * Returns: errno
1454  */
1455
1456 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1457 {
1458         int error;
1459
1460         error = gfs2_rindex_update(GFS2_SB(&ip->i_inode));
1461         if (error)
1462                 return error;
1463
1464         error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
1465         if (error)
1466                 return error;
1467
1468         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1469         if (error)
1470                 goto out_quota;
1471
1472         if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
1473                 error = ea_dealloc_indirect(ip);
1474                 if (error)
1475                         goto out_quota;
1476         }
1477
1478         error = ea_dealloc_block(ip);
1479
1480 out_quota:
1481         gfs2_quota_unhold(ip);
1482         return error;
1483 }
1484
1485 static const struct xattr_handler gfs2_xattr_user_handler = {
1486         .prefix = XATTR_USER_PREFIX,
1487         .flags  = GFS2_EATYPE_USR,
1488         .get    = gfs2_xattr_get,
1489         .set    = gfs2_xattr_set,
1490 };
1491
1492 static const struct xattr_handler gfs2_xattr_security_handler = {
1493         .prefix = XATTR_SECURITY_PREFIX,
1494         .flags  = GFS2_EATYPE_SECURITY,
1495         .get    = gfs2_xattr_get,
1496         .set    = gfs2_xattr_set,
1497 };
1498
1499 const struct xattr_handler *gfs2_xattr_handlers[] = {
1500         &gfs2_xattr_user_handler,
1501         &gfs2_xattr_security_handler,
1502         &gfs2_xattr_system_handler,
1503         NULL,
1504 };
1505