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         if (GFS2_EA_IS_STUFFED(ea))
 242                 return 0;
 243
 244         dataptrs = GFS2_EA2DATAPTRS(ea);
 245         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
 246                 if (*dataptrs) {
 247                         blks++;
 248                         bn = be64_to_cpu(*dataptrs);
 249                 }
 250         }
 251         if (!blks)
 252                 return 0;
 253
 254         rgd = gfs2_blk2rgrpd(sdp, bn);
 255         if (!rgd) {
 256                 gfs2_consist_inode(ip);
 257                 return -EIO;
 258         }
 259
 260         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
 261         if (error)
 262                 return error;
 263
 264         error = gfs2_trans_begin(sdp, rgd->rd_length + RES_DINODE +
 265                                  RES_EATTR + RES_STATFS + RES_QUOTA, blks);
 266         if (error)
 267                 goto out_gunlock;
 268
 269         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 270
 271         dataptrs = GFS2_EA2DATAPTRS(ea);
 272         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
 273                 if (!*dataptrs)
 274                         break;
 275                 bn = be64_to_cpu(*dataptrs);
 276
 277                 if (bstart + blen == bn)
 278                         blen++;
 279                 else {
 280                         if (bstart)
 281                                 gfs2_free_meta(ip, bstart, blen);
 282                         bstart = bn;
 283                         blen = 1;
 284                 }
 285
 286                 *dataptrs = 0;
 287                 gfs2_add_inode_blocks(&ip->i_inode, -1);
 288         }
 289         if (bstart)
 290                 gfs2_free_meta(ip, bstart, blen);
 291
 292         if (prev && !leave) {
 293                 u32 len;
 294
 295                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 296                 prev->ea_rec_len = cpu_to_be32(len);
 297
 298                 if (GFS2_EA_IS_LAST(ea))
 299                         prev->ea_flags |= GFS2_EAFLAG_LAST;
 300         } else {
 301                 ea->ea_type = GFS2_EATYPE_UNUSED;
 302                 ea->ea_num_ptrs = 0;
 303         }
 304
 305         error = gfs2_meta_inode_buffer(ip, &dibh);
 306         if (!error) {
 307                 ip->i_inode.i_ctime = CURRENT_TIME;
 308                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 309                 gfs2_dinode_out(ip, dibh->b_data);
 310                 brelse(dibh);
 311         }
 312
 313         gfs2_trans_end(sdp);
 314
 315 out_gunlock:
 316         gfs2_glock_dq_uninit(&rg_gh);
 317         return error;
 318 }
 319
 320 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 321                                struct gfs2_ea_header *ea,
 322                                struct gfs2_ea_header *prev, int leave)
 323 {
 324         struct gfs2_alloc *al;
 325         int error;
 326
 327         al = gfs2_alloc_get(ip);
 328         if (!al)
 329                 return -ENOMEM;
 330
 331         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 332         if (error)
 333                 goto out_alloc;
 334
 335         error = ea_dealloc_unstuffed(ip, bh, ea, prev, (leave) ? &error : NULL);
 336
 337         gfs2_quota_unhold(ip);
 338 out_alloc:
 339         gfs2_alloc_put(ip);
 340         return error;
 341 }
 342
 343 struct ea_list {
 344         struct gfs2_ea_request *ei_er;
 345         unsigned int ei_size;
 346 };
 347
 348 static inline unsigned int gfs2_ea_strlen(struct gfs2_ea_header *ea)
 349 {
 350         switch (ea->ea_type) {
 351         case GFS2_EATYPE_USR:
 352                 return 5 + ea->ea_name_len + 1;
 353         case GFS2_EATYPE_SYS:
 354                 return 7 + ea->ea_name_len + 1;
 355         case GFS2_EATYPE_SECURITY:
 356                 return 9 + ea->ea_name_len + 1;
 357         default:
 358                 return 0;
 359         }
 360 }
 361
 362 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
 363                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 364                      void *private)
 365 {
 366         struct ea_list *ei = private;
 367         struct gfs2_ea_request *er = ei->ei_er;
 368         unsigned int ea_size = gfs2_ea_strlen(ea);
 369
 370         if (ea->ea_type == GFS2_EATYPE_UNUSED)
 371                 return 0;
 372
 373         if (er->er_data_len) {
 374                 char *prefix = NULL;
 375                 unsigned int l = 0;
 376                 char c = 0;
 377
 378                 if (ei->ei_size + ea_size > er->er_data_len)
 379                         return -ERANGE;
 380
 381                 switch (ea->ea_type) {
 382                 case GFS2_EATYPE_USR:
 383                         prefix = "user.";
 384                         l = 5;
 385                         break;
 386                 case GFS2_EATYPE_SYS:
 387                         prefix = "system.";
 388                         l = 7;
 389                         break;
 390                 case GFS2_EATYPE_SECURITY:
 391                         prefix = "security.";
 392                         l = 9;
 393                         break;
 394                 }
 395
 396                 BUG_ON(l == 0);
 397
 398                 memcpy(er->er_data + ei->ei_size, prefix, l);
 399                 memcpy(er->er_data + ei->ei_size + l, GFS2_EA2NAME(ea),
 400                        ea->ea_name_len);
 401                 memcpy(er->er_data + ei->ei_size + ea_size - 1, &c, 1);
 402         }
 403
 404         ei->ei_size += ea_size;
 405
 406         return 0;
 407 }
 408
 409 /**
 410  * gfs2_listxattr - List gfs2 extended attributes
 411  * @dentry: The dentry whose inode we are interested in
 412  * @buffer: The buffer to write the results
 413  * @size: The size of the buffer
 414  *
 415  * Returns: actual size of data on success, -errno on error
 416  */
 417
 418 ssize_t gfs2_listxattr(struct dentry *dentry, char *buffer, size_t size)
 419 {
 420         struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
 421         struct gfs2_ea_request er;
 422         struct gfs2_holder i_gh;
 423         int error;
 424
 425         memset(&er, 0, sizeof(struct gfs2_ea_request));
 426         if (size) {
 427                 er.er_data = buffer;
 428                 er.er_data_len = size;
 429         }
 430
 431         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_ANY, &i_gh);
 432         if (error)
 433                 return error;
 434
 435         if (ip->i_eattr) {
 436                 struct ea_list ei = { .ei_er = &er, .ei_size = 0 };
 437
 438                 error = ea_foreach(ip, ea_list_i, &ei);
 439                 if (!error)
 440                         error = ei.ei_size;
 441         }
 442
 443         gfs2_glock_dq_uninit(&i_gh);
 444
 445         return error;
 446 }
 447
 448 /**
 449  * ea_get_unstuffed - actually copies the unstuffed data into the
 450  *                    request buffer
 451  * @ip: The GFS2 inode
 452  * @ea: The extended attribute header structure
 453  * @data: The data to be copied
 454  *
 455  * Returns: errno
 456  */
 457
 458 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 459                             char *data)
 460 {
 461         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 462         struct buffer_head **bh;
 463         unsigned int amount = GFS2_EA_DATA_LEN(ea);
 464         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
 465         __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
 466         unsigned int x;
 467         int error = 0;
 468
 469         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
 470         if (!bh)
 471                 return -ENOMEM;
 472
 473         for (x = 0; x < nptrs; x++) {
 474                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
 475                                        bh + x);
 476                 if (error) {
 477                         while (x--)
 478                                 brelse(bh[x]);
 479                         goto out;
 480                 }
 481                 dataptrs++;
 482         }
 483
 484         for (x = 0; x < nptrs; x++) {
 485                 error = gfs2_meta_wait(sdp, bh[x]);
 486                 if (error) {
 487                         for (; x < nptrs; x++)
 488                                 brelse(bh[x]);
 489                         goto out;
 490                 }
 491                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
 492                         for (; x < nptrs; x++)
 493                                 brelse(bh[x]);
 494                         error = -EIO;
 495                         goto out;
 496                 }
 497
 498                 memcpy(data, bh[x]->b_data + sizeof(struct gfs2_meta_header),
 499                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
 500
 501                 amount -= sdp->sd_jbsize;
 502                 data += sdp->sd_jbsize;
 503
 504                 brelse(bh[x]);
 505         }
 506
 507 out:
 508         kfree(bh);
 509         return error;
 510 }
 511
 512 static int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
 513                             char *data, size_t size)
 514 {
 515         int ret;
 516         size_t len = GFS2_EA_DATA_LEN(el->el_ea);
 517         if (len > size)
 518                 return -ERANGE;
 519
 520         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
 521                 memcpy(data, GFS2_EA2DATA(el->el_ea), len);
 522                 return len;
 523         }
 524         ret = ea_get_unstuffed(ip, el->el_ea, data);
 525         if (ret < 0)
 526                 return ret;
 527         return len;
 528 }
 529
 530 int gfs2_xattr_acl_get(struct gfs2_inode *ip, const char *name, char **ppdata)
 531 {
 532         struct gfs2_ea_location el;
 533         int error;
 534         int len;
 535         char *data;
 536
 537         error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, name, &el);
 538         if (error)
 539                 return error;
 540         if (!el.el_ea)
 541                 goto out;
 542         if (!GFS2_EA_DATA_LEN(el.el_ea))
 543                 goto out;
 544
 545         len = GFS2_EA_DATA_LEN(el.el_ea);
 546         data = kmalloc(len, GFP_NOFS);
 547         error = -ENOMEM;
 548         if (data == NULL)
 549                 goto out;
 550
 551         error = gfs2_ea_get_copy(ip, &el, data, len);
 552         if (error == 0)
 553                 error = len;
 554         *ppdata = data;
 555 out:
 556         brelse(el.el_bh);
 557         return error;
 558 }
 559
 560 /**
 561  * gfs2_xattr_get - Get a GFS2 extended attribute
 562  * @inode: The inode
 563  * @name: The name of the extended attribute
 564  * @buffer: The buffer to write the result into
 565  * @size: The size of the buffer
 566  * @type: The type of extended attribute
 567  *
 568  * Returns: actual size of data on success, -errno on error
 569  */
 570 static int gfs2_xattr_get(struct dentry *dentry, const char *name,
 571                 void *buffer, size_t size, int type)
 572 {
 573         struct gfs2_inode *ip = GFS2_I(dentry->d_inode);
 574         struct gfs2_ea_location el;
 575         int error;
 576
 577         if (!ip->i_eattr)
 578                 return -ENODATA;
 579         if (strlen(name) > GFS2_EA_MAX_NAME_LEN)
 580                 return -EINVAL;
 581
 582         error = gfs2_ea_find(ip, type, name, &el);
 583         if (error)
 584                 return error;
 585         if (!el.el_ea)
 586                 return -ENODATA;
 587         if (size)
 588                 error = gfs2_ea_get_copy(ip, &el, buffer, size);
 589         else
 590                 error = GFS2_EA_DATA_LEN(el.el_ea);
 591         brelse(el.el_bh);
 592
 593         return error;
 594 }
 595
 596 /**
 597  * ea_alloc_blk - allocates a new block for extended attributes.
 598  * @ip: A pointer to the inode that's getting extended attributes
 599  * @bhp: Pointer to pointer to a struct buffer_head
 600  *
 601  * Returns: errno
 602  */
 603
 604 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
 605 {
 606         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 607         struct gfs2_ea_header *ea;
 608         unsigned int n = 1;
 609         u64 block;
 610         int error;
 611
 612         error = gfs2_alloc_block(ip, &block, &n);
 613         if (error)
 614                 return error;
 615         gfs2_trans_add_unrevoke(sdp, block, 1);
 616         *bhp = gfs2_meta_new(ip->i_gl, block);
 617         gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
 618         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
 619         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
 620
 621         ea = GFS2_EA_BH2FIRST(*bhp);
 622         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
 623         ea->ea_type = GFS2_EATYPE_UNUSED;
 624         ea->ea_flags = GFS2_EAFLAG_LAST;
 625         ea->ea_num_ptrs = 0;
 626
 627         gfs2_add_inode_blocks(&ip->i_inode, 1);
 628
 629         return 0;
 630 }
 631
 632 /**
 633  * ea_write - writes the request info to an ea, creating new blocks if
 634  *            necessary
 635  * @ip: inode that is being modified
 636  * @ea: the location of the new ea in a block
 637  * @er: the write request
 638  *
 639  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
 640  *
 641  * returns : errno
 642  */
 643
 644 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 645                     struct gfs2_ea_request *er)
 646 {
 647         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 648         int error;
 649
 650         ea->ea_data_len = cpu_to_be32(er->er_data_len);
 651         ea->ea_name_len = er->er_name_len;
 652         ea->ea_type = er->er_type;
 653         ea->__pad = 0;
 654
 655         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
 656
 657         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
 658                 ea->ea_num_ptrs = 0;
 659                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
 660         } else {
 661                 __be64 *dataptr = GFS2_EA2DATAPTRS(ea);
 662                 const char *data = er->er_data;
 663                 unsigned int data_len = er->er_data_len;
 664                 unsigned int copy;
 665                 unsigned int x;
 666
 667                 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
 668                 for (x = 0; x < ea->ea_num_ptrs; x++) {
 669                         struct buffer_head *bh;
 670                         u64 block;
 671                         int mh_size = sizeof(struct gfs2_meta_header);
 672                         unsigned int n = 1;
 673
 674                         error = gfs2_alloc_block(ip, &block, &n);
 675                         if (error)
 676                                 return error;
 677                         gfs2_trans_add_unrevoke(sdp, block, 1);
 678                         bh = gfs2_meta_new(ip->i_gl, block);
 679                         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 680                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
 681
 682                         gfs2_add_inode_blocks(&ip->i_inode, 1);
 683
 684                         copy = data_len > sdp->sd_jbsize ? sdp->sd_jbsize :
 685                                                            data_len;
 686                         memcpy(bh->b_data + mh_size, data, copy);
 687                         if (copy < sdp->sd_jbsize)
 688                                 memset(bh->b_data + mh_size + copy, 0,
 689                                        sdp->sd_jbsize - copy);
 690
 691                         *dataptr++ = cpu_to_be64(bh->b_blocknr);
 692                         data += copy;
 693                         data_len -= copy;
 694
 695                         brelse(bh);
 696                 }
 697
 698                 gfs2_assert_withdraw(sdp, !data_len);
 699         }
 700
 701         return 0;
 702 }
 703
 704 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
 705                                    struct gfs2_ea_request *er, void *private);
 706
 707 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 708                              unsigned int blks,
 709                              ea_skeleton_call_t skeleton_call, void *private)
 710 {
 711         struct gfs2_alloc *al;
 712         struct buffer_head *dibh;
 713         int error;
 714
 715         al = gfs2_alloc_get(ip);
 716         if (!al)
 717                 return -ENOMEM;
 718
 719         error = gfs2_quota_lock_check(ip);
 720         if (error)
 721                 goto out;
 722
 723         al->al_requested = blks;
 724
 725         error = gfs2_inplace_reserve(ip);
 726         if (error)
 727                 goto out_gunlock_q;
 728
 729         error = gfs2_trans_begin(GFS2_SB(&ip->i_inode),
 730                                  blks + gfs2_rg_blocks(ip) +
 731                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
 732         if (error)
 733                 goto out_ipres;
 734
 735         error = skeleton_call(ip, er, private);
 736         if (error)
 737                 goto out_end_trans;
 738
 739         error = gfs2_meta_inode_buffer(ip, &dibh);
 740         if (!error) {
 741                 ip->i_inode.i_ctime = CURRENT_TIME;
 742                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 743                 gfs2_dinode_out(ip, dibh->b_data);
 744                 brelse(dibh);
 745         }
 746
 747 out_end_trans:
 748         gfs2_trans_end(GFS2_SB(&ip->i_inode));
 749 out_ipres:
 750         gfs2_inplace_release(ip);
 751 out_gunlock_q:
 752         gfs2_quota_unlock(ip);
 753 out:
 754         gfs2_alloc_put(ip);
 755         return error;
 756 }
 757
 758 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 759                      void *private)
 760 {
 761         struct buffer_head *bh;
 762         int error;
 763
 764         error = ea_alloc_blk(ip, &bh);
 765         if (error)
 766                 return error;
 767
 768         ip->i_eattr = bh->b_blocknr;
 769         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
 770
 771         brelse(bh);
 772
 773         return error;
 774 }
 775
 776 /**
 777  * ea_init - initializes a new eattr block
 778  * @ip:
 779  * @er:
 780  *
 781  * Returns: errno
 782  */
 783
 784 static int ea_init(struct gfs2_inode *ip, int type, const char *name,
 785                    const void *data, size_t size)
 786 {
 787         struct gfs2_ea_request er;
 788         unsigned int jbsize = GFS2_SB(&ip->i_inode)->sd_jbsize;
 789         unsigned int blks = 1;
 790
 791         er.er_type = type;
 792         er.er_name = name;
 793         er.er_name_len = strlen(name);
 794         er.er_data = (void *)data;
 795         er.er_data_len = size;
 796
 797         if (GFS2_EAREQ_SIZE_STUFFED(&er) > jbsize)
 798                 blks += DIV_ROUND_UP(er.er_data_len, jbsize);
 799
 800         return ea_alloc_skeleton(ip, &er, blks, ea_init_i, NULL);
 801 }
 802
 803 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
 804 {
 805         u32 ea_size = GFS2_EA_SIZE(ea);
 806         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
 807                                      ea_size);
 808         u32 new_size = GFS2_EA_REC_LEN(ea) - ea_size;
 809         int last = ea->ea_flags & GFS2_EAFLAG_LAST;
 810
 811         ea->ea_rec_len = cpu_to_be32(ea_size);
 812         ea->ea_flags ^= last;
 813
 814         new->ea_rec_len = cpu_to_be32(new_size);
 815         new->ea_flags = last;
 816
 817         return new;
 818 }
 819
 820 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
 821                                   struct gfs2_ea_location *el)
 822 {
 823         struct gfs2_ea_header *ea = el->el_ea;
 824         struct gfs2_ea_header *prev = el->el_prev;
 825         u32 len;
 826
 827         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
 828
 829         if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
 830                 ea->ea_type = GFS2_EATYPE_UNUSED;
 831                 return;
 832         } else if (GFS2_EA2NEXT(prev) != ea) {
 833                 prev = GFS2_EA2NEXT(prev);
 834                 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode), GFS2_EA2NEXT(prev) == ea);
 835         }
 836
 837         len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 838         prev->ea_rec_len = cpu_to_be32(len);
 839
 840         if (GFS2_EA_IS_LAST(ea))
 841                 prev->ea_flags |= GFS2_EAFLAG_LAST;
 842 }
 843
 844 struct ea_set {
 845         int ea_split;
 846
 847         struct gfs2_ea_request *es_er;
 848         struct gfs2_ea_location *es_el;
 849
 850         struct buffer_head *es_bh;
 851         struct gfs2_ea_header *es_ea;
 852 };
 853
 854 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
 855                                  struct gfs2_ea_header *ea, struct ea_set *es)
 856 {
 857         struct gfs2_ea_request *er = es->es_er;
 858         struct buffer_head *dibh;
 859         int error;
 860
 861         error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + 2 * RES_EATTR, 0);
 862         if (error)
 863                 return error;
 864
 865         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 866
 867         if (es->ea_split)
 868                 ea = ea_split_ea(ea);
 869
 870         ea_write(ip, ea, er);
 871
 872         if (es->es_el)
 873                 ea_set_remove_stuffed(ip, es->es_el);
 874
 875         error = gfs2_meta_inode_buffer(ip, &dibh);
 876         if (error)
 877                 goto out;
 878         ip->i_inode.i_ctime = CURRENT_TIME;
 879         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 880         gfs2_dinode_out(ip, dibh->b_data);
 881         brelse(dibh);
 882 out:
 883         gfs2_trans_end(GFS2_SB(&ip->i_inode));
 884         return error;
 885 }
 886
 887 static int ea_set_simple_alloc(struct gfs2_inode *ip,
 888                                struct gfs2_ea_request *er, void *private)
 889 {
 890         struct ea_set *es = private;
 891         struct gfs2_ea_header *ea = es->es_ea;
 892         int error;
 893
 894         gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
 895
 896         if (es->ea_split)
 897                 ea = ea_split_ea(ea);
 898
 899         error = ea_write(ip, ea, er);
 900         if (error)
 901                 return error;
 902
 903         if (es->es_el)
 904                 ea_set_remove_stuffed(ip, es->es_el);
 905
 906         return 0;
 907 }
 908
 909 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
 910                          struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 911                          void *private)
 912 {
 913         struct ea_set *es = private;
 914         unsigned int size;
 915         int stuffed;
 916         int error;
 917
 918         stuffed = ea_calc_size(GFS2_SB(&ip->i_inode), es->es_er->er_name_len,
 919                                es->es_er->er_data_len, &size);
 920
 921         if (ea->ea_type == GFS2_EATYPE_UNUSED) {
 922                 if (GFS2_EA_REC_LEN(ea) < size)
 923                         return 0;
 924                 if (!GFS2_EA_IS_STUFFED(ea)) {
 925                         error = ea_remove_unstuffed(ip, bh, ea, prev, 1);
 926                         if (error)
 927                                 return error;
 928                 }
 929                 es->ea_split = 0;
 930         } else if (GFS2_EA_REC_LEN(ea) - GFS2_EA_SIZE(ea) >= size)
 931                 es->ea_split = 1;
 932         else
 933                 return 0;
 934
 935         if (stuffed) {
 936                 error = ea_set_simple_noalloc(ip, bh, ea, es);
 937                 if (error)
 938                         return error;
 939         } else {
 940                 unsigned int blks;
 941
 942                 es->es_bh = bh;
 943                 es->es_ea = ea;
 944                 blks = 2 + DIV_ROUND_UP(es->es_er->er_data_len,
 945                                         GFS2_SB(&ip->i_inode)->sd_jbsize);
 946
 947                 error = ea_alloc_skeleton(ip, es->es_er, blks,
 948                                           ea_set_simple_alloc, es);
 949                 if (error)
 950                         return error;
 951         }
 952
 953         return 1;
 954 }
 955
 956 static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 957                         void *private)
 958 {
 959         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 960         struct buffer_head *indbh, *newbh;
 961         __be64 *eablk;
 962         int error;
 963         int mh_size = sizeof(struct gfs2_meta_header);
 964
 965         if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
 966                 __be64 *end;
 967
 968                 error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT,
 969                                        &indbh);
 970                 if (error)
 971                         return error;
 972
 973                 if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
 974                         error = -EIO;
 975                         goto out;
 976                 }
 977
 978                 eablk = (__be64 *)(indbh->b_data + mh_size);
 979                 end = eablk + sdp->sd_inptrs;
 980
 981                 for (; eablk < end; eablk++)
 982                         if (!*eablk)
 983                                 break;
 984
 985                 if (eablk == end) {
 986                         error = -ENOSPC;
 987                         goto out;
 988                 }
 989
 990                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
 991         } else {
 992                 u64 blk;
 993                 unsigned int n = 1;
 994                 error = gfs2_alloc_block(ip, &blk, &n);
 995                 if (error)
 996                         return error;
 997                 gfs2_trans_add_unrevoke(sdp, blk, 1);
 998                 indbh = gfs2_meta_new(ip->i_gl, blk);
 999                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1000                 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
1001                 gfs2_buffer_clear_tail(indbh, mh_size);
1002
1003                 eablk = (__be64 *)(indbh->b_data + mh_size);
1004                 *eablk = cpu_to_be64(ip->i_eattr);
1005                 ip->i_eattr = blk;
1006                 ip->i_diskflags |= GFS2_DIF_EA_INDIRECT;
1007                 gfs2_add_inode_blocks(&ip->i_inode, 1);
1008
1009                 eablk++;
1010         }
1011
1012         error = ea_alloc_blk(ip, &newbh);
1013         if (error)
1014                 goto out;
1015
1016         *eablk = cpu_to_be64((u64)newbh->b_blocknr);
1017         error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1018         brelse(newbh);
1019         if (error)
1020                 goto out;
1021
1022         if (private)
1023                 ea_set_remove_stuffed(ip, private);
1024
1025 out:
1026         brelse(indbh);
1027         return error;
1028 }
1029
1030 static int ea_set_i(struct gfs2_inode *ip, int type, const char *name,
1031                     const void *value, size_t size, struct gfs2_ea_location *el)
1032 {
1033         struct gfs2_ea_request er;
1034         struct ea_set es;
1035         unsigned int blks = 2;
1036         int error;
1037
1038         er.er_type = type;
1039         er.er_name = name;
1040         er.er_data = (void *)value;
1041         er.er_name_len = strlen(name);
1042         er.er_data_len = size;
1043
1044         memset(&es, 0, sizeof(struct ea_set));
1045         es.es_er = &er;
1046         es.es_el = el;
1047
1048         error = ea_foreach(ip, ea_set_simple, &es);
1049         if (error > 0)
1050                 return 0;
1051         if (error)
1052                 return error;
1053
1054         if (!(ip->i_diskflags & GFS2_DIF_EA_INDIRECT))
1055                 blks++;
1056         if (GFS2_EAREQ_SIZE_STUFFED(&er) > GFS2_SB(&ip->i_inode)->sd_jbsize)
1057                 blks += DIV_ROUND_UP(er.er_data_len, GFS2_SB(&ip->i_inode)->sd_jbsize);
1058
1059         return ea_alloc_skeleton(ip, &er, blks, ea_set_block, el);
1060 }
1061
1062 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1063                                    struct gfs2_ea_location *el)
1064 {
1065         if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1066                 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1067                 gfs2_assert_withdraw(GFS2_SB(&ip->i_inode),
1068                                      GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1069         }
1070
1071         return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev, 0);
1072 }
1073
1074 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1075 {
1076         struct gfs2_ea_header *ea = el->el_ea;
1077         struct gfs2_ea_header *prev = el->el_prev;
1078         struct buffer_head *dibh;
1079         int error;
1080
1081         error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE + RES_EATTR, 0);
1082         if (error)
1083                 return error;
1084
1085         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1086
1087         if (prev) {
1088                 u32 len;
1089
1090                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1091                 prev->ea_rec_len = cpu_to_be32(len);
1092
1093                 if (GFS2_EA_IS_LAST(ea))
1094                         prev->ea_flags |= GFS2_EAFLAG_LAST;
1095         } else {
1096                 ea->ea_type = GFS2_EATYPE_UNUSED;
1097         }
1098
1099         error = gfs2_meta_inode_buffer(ip, &dibh);
1100         if (!error) {
1101                 ip->i_inode.i_ctime = CURRENT_TIME;
1102                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1103                 gfs2_dinode_out(ip, dibh->b_data);
1104                 brelse(dibh);
1105         }
1106
1107         gfs2_trans_end(GFS2_SB(&ip->i_inode));
1108
1109         return error;
1110 }
1111
1112 /**
1113  * gfs2_xattr_remove - Remove a GFS2 extended attribute
1114  * @ip: The inode
1115  * @type: The type of the extended attribute
1116  * @name: The name of the extended attribute
1117  *
1118  * This is not called directly by the VFS since we use the (common)
1119  * scheme of making a "set with NULL data" mean a remove request. Note
1120  * that this is different from a set with zero length data.
1121  *
1122  * Returns: 0, or errno on failure
1123  */
1124
1125 static int gfs2_xattr_remove(struct gfs2_inode *ip, int type, const char *name)
1126 {
1127         struct gfs2_ea_location el;
1128         int error;
1129
1130         if (!ip->i_eattr)
1131                 return -ENODATA;
1132
1133         error = gfs2_ea_find(ip, type, name, &el);
1134         if (error)
1135                 return error;
1136         if (!el.el_ea)
1137                 return -ENODATA;
1138
1139         if (GFS2_EA_IS_STUFFED(el.el_ea))
1140                 error = ea_remove_stuffed(ip, &el);
1141         else
1142                 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev, 0);
1143
1144         brelse(el.el_bh);
1145
1146         return error;
1147 }
1148
1149 /**
1150  * __gfs2_xattr_set - Set (or remove) a GFS2 extended attribute
1151  * @ip: The inode
1152  * @name: The name of the extended attribute
1153  * @value: The value of the extended attribute (NULL for remove)
1154  * @size: The size of the @value argument
1155  * @flags: Create or Replace
1156  * @type: The type of the extended attribute
1157  *
1158  * See gfs2_xattr_remove() for details of the removal of xattrs.
1159  *
1160  * Returns: 0 or errno on failure
1161  */
1162
1163 int __gfs2_xattr_set(struct inode *inode, const char *name,
1164                    const void *value, size_t size, int flags, int type)
1165 {
1166         struct gfs2_inode *ip = GFS2_I(inode);
1167         struct gfs2_sbd *sdp = GFS2_SB(inode);
1168         struct gfs2_ea_location el;
1169         unsigned int namel = strlen(name);
1170         int error;
1171
1172         if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
1173                 return -EPERM;
1174         if (namel > GFS2_EA_MAX_NAME_LEN)
1175                 return -ERANGE;
1176
1177         if (value == NULL)
1178                 return gfs2_xattr_remove(ip, type, name);
1179
1180         if (ea_check_size(sdp, namel, size))
1181                 return -ERANGE;
1182
1183         if (!ip->i_eattr) {
1184                 if (flags & XATTR_REPLACE)
1185                         return -ENODATA;
1186                 return ea_init(ip, type, name, value, size);
1187         }
1188
1189         error = gfs2_ea_find(ip, type, name, &el);
1190         if (error)
1191                 return error;
1192
1193         if (el.el_ea) {
1194                 if (ip->i_diskflags & GFS2_DIF_APPENDONLY) {
1195                         brelse(el.el_bh);
1196                         return -EPERM;
1197                 }
1198
1199                 error = -EEXIST;
1200                 if (!(flags & XATTR_CREATE)) {
1201                         int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1202                         error = ea_set_i(ip, type, name, value, size, &el);
1203                         if (!error && unstuffed)
1204                                 ea_set_remove_unstuffed(ip, &el);
1205                 }
1206
1207                 brelse(el.el_bh);
1208                 return error;
1209         }
1210
1211         error = -ENODATA;
1212         if (!(flags & XATTR_REPLACE))
1213                 error = ea_set_i(ip, type, name, value, size, NULL);
1214
1215         return error;
1216 }
1217
1218 static int gfs2_xattr_set(struct dentry *dentry, const char *name,
1219                 const void *value, size_t size, int flags, int type)
1220 {
1221         return __gfs2_xattr_set(dentry->d_inode, name, value,
1222                                 size, flags, type);
1223 }
1224
1225 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1226                                   struct gfs2_ea_header *ea, char *data)
1227 {
1228         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1229         struct buffer_head **bh;
1230         unsigned int amount = GFS2_EA_DATA_LEN(ea);
1231         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1232         __be64 *dataptrs = GFS2_EA2DATAPTRS(ea);
1233         unsigned int x;
1234         int error;
1235
1236         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_NOFS);
1237         if (!bh)
1238                 return -ENOMEM;
1239
1240         error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1241         if (error)
1242                 goto out;
1243
1244         for (x = 0; x < nptrs; x++) {
1245                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs), 0,
1246                                        bh + x);
1247                 if (error) {
1248                         while (x--)
1249                                 brelse(bh[x]);
1250                         goto fail;
1251                 }
1252                 dataptrs++;
1253         }
1254
1255         for (x = 0; x < nptrs; x++) {
1256                 error = gfs2_meta_wait(sdp, bh[x]);
1257                 if (error) {
1258                         for (; x < nptrs; x++)
1259                                 brelse(bh[x]);
1260                         goto fail;
1261                 }
1262                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1263                         for (; x < nptrs; x++)
1264                                 brelse(bh[x]);
1265                         error = -EIO;
1266                         goto fail;
1267                 }
1268
1269                 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1270
1271                 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header), data,
1272                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1273
1274                 amount -= sdp->sd_jbsize;
1275                 data += sdp->sd_jbsize;
1276
1277                 brelse(bh[x]);
1278         }
1279
1280 out:
1281         kfree(bh);
1282         return error;
1283
1284 fail:
1285         gfs2_trans_end(sdp);
1286         kfree(bh);
1287         return error;
1288 }
1289
1290 int gfs2_xattr_acl_chmod(struct gfs2_inode *ip, struct iattr *attr, char *data)
1291 {
1292         struct inode *inode = &ip->i_inode;
1293         struct gfs2_sbd *sdp = GFS2_SB(inode);
1294         struct gfs2_ea_location el;
1295         int error;
1296
1297         error = gfs2_ea_find(ip, GFS2_EATYPE_SYS, GFS2_POSIX_ACL_ACCESS, &el);
1298         if (error)
1299                 return error;
1300
1301         if (GFS2_EA_IS_STUFFED(el.el_ea)) {
1302                 error = gfs2_trans_begin(sdp, RES_DINODE + RES_EATTR, 0);
1303                 if (error == 0) {
1304                         gfs2_trans_add_bh(ip->i_gl, el.el_bh, 1);
1305                         memcpy(GFS2_EA2DATA(el.el_ea), data,
1306                                GFS2_EA_DATA_LEN(el.el_ea));
1307                 }
1308         } else {
1309                 error = ea_acl_chmod_unstuffed(ip, el.el_ea, data);
1310         }
1311
1312         brelse(el.el_bh);
1313         if (error)
1314                 return error;
1315
1316         error = gfs2_setattr_simple(inode, attr);
1317         gfs2_trans_end(sdp);
1318         return error;
1319 }
1320
1321 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1322 {
1323         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1324         struct gfs2_rgrp_list rlist;
1325         struct buffer_head *indbh, *dibh;
1326         __be64 *eablk, *end;
1327         unsigned int rg_blocks = 0;
1328         u64 bstart = 0;
1329         unsigned int blen = 0;
1330         unsigned int blks = 0;
1331         unsigned int x;
1332         int error;
1333
1334         memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1335
1336         error = gfs2_meta_read(ip->i_gl, ip->i_eattr, DIO_WAIT, &indbh);
1337         if (error)
1338                 return error;
1339
1340         if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1341                 error = -EIO;
1342                 goto out;
1343         }
1344
1345         eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1346         end = eablk + sdp->sd_inptrs;
1347
1348         for (; eablk < end; eablk++) {
1349                 u64 bn;
1350
1351                 if (!*eablk)
1352                         break;
1353                 bn = be64_to_cpu(*eablk);
1354
1355                 if (bstart + blen == bn)
1356                         blen++;
1357                 else {
1358                         if (bstart)
1359                                 gfs2_rlist_add(ip, &rlist, bstart);
1360                         bstart = bn;
1361                         blen = 1;
1362                 }
1363                 blks++;
1364         }
1365         if (bstart)
1366                 gfs2_rlist_add(ip, &rlist, bstart);
1367         else
1368                 goto out;
1369
1370         gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE);
1371
1372         for (x = 0; x < rlist.rl_rgrps; x++) {
1373                 struct gfs2_rgrpd *rgd;
1374                 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1375                 rg_blocks += rgd->rd_length;
1376         }
1377
1378         error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1379         if (error)
1380                 goto out_rlist_free;
1381
1382         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE + RES_INDIRECT +
1383                                  RES_STATFS + RES_QUOTA, blks);
1384         if (error)
1385                 goto out_gunlock;
1386
1387         gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1388
1389         eablk = (__be64 *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1390         bstart = 0;
1391         blen = 0;
1392
1393         for (; eablk < end; eablk++) {
1394                 u64 bn;
1395
1396                 if (!*eablk)
1397                         break;
1398                 bn = be64_to_cpu(*eablk);
1399
1400                 if (bstart + blen == bn)
1401                         blen++;
1402                 else {
1403                         if (bstart)
1404                                 gfs2_free_meta(ip, bstart, blen);
1405                         bstart = bn;
1406                         blen = 1;
1407                 }
1408
1409                 *eablk = 0;
1410                 gfs2_add_inode_blocks(&ip->i_inode, -1);
1411         }
1412         if (bstart)
1413                 gfs2_free_meta(ip, bstart, blen);
1414
1415         ip->i_diskflags &= ~GFS2_DIF_EA_INDIRECT;
1416
1417         error = gfs2_meta_inode_buffer(ip, &dibh);
1418         if (!error) {
1419                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1420                 gfs2_dinode_out(ip, dibh->b_data);
1421                 brelse(dibh);
1422         }
1423
1424         gfs2_trans_end(sdp);
1425
1426 out_gunlock:
1427         gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1428 out_rlist_free:
1429         gfs2_rlist_free(&rlist);
1430 out:
1431         brelse(indbh);
1432         return error;
1433 }
1434
1435 static int ea_dealloc_block(struct gfs2_inode *ip)
1436 {
1437         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1438         struct gfs2_alloc *al = ip->i_alloc;
1439         struct gfs2_rgrpd *rgd;
1440         struct buffer_head *dibh;
1441         int error;
1442
1443         rgd = gfs2_blk2rgrpd(sdp, ip->i_eattr);
1444         if (!rgd) {
1445                 gfs2_consist_inode(ip);
1446                 return -EIO;
1447         }
1448
1449         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1450                                    &al->al_rgd_gh);
1451         if (error)
1452                 return error;
1453
1454         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE + RES_STATFS +
1455                                  RES_QUOTA, 1);
1456         if (error)
1457                 goto out_gunlock;
1458
1459         gfs2_free_meta(ip, ip->i_eattr, 1);
1460
1461         ip->i_eattr = 0;
1462         gfs2_add_inode_blocks(&ip->i_inode, -1);
1463
1464         error = gfs2_meta_inode_buffer(ip, &dibh);
1465         if (!error) {
1466                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1467                 gfs2_dinode_out(ip, dibh->b_data);
1468                 brelse(dibh);
1469         }
1470
1471         gfs2_trans_end(sdp);
1472
1473 out_gunlock:
1474         gfs2_glock_dq_uninit(&al->al_rgd_gh);
1475         return error;
1476 }
1477
1478 /**
1479  * gfs2_ea_dealloc - deallocate the extended attribute fork
1480  * @ip: the inode
1481  *
1482  * Returns: errno
1483  */
1484
1485 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1486 {
1487         struct gfs2_alloc *al;
1488         int error;
1489
1490         al = gfs2_alloc_get(ip);
1491         if (!al)
1492                 return -ENOMEM;
1493
1494         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1495         if (error)
1496                 goto out_alloc;
1497
1498         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1499         if (error)
1500                 goto out_quota;
1501
1502         if (ip->i_diskflags & GFS2_DIF_EA_INDIRECT) {
1503                 error = ea_dealloc_indirect(ip);
1504                 if (error)
1505                         goto out_quota;
1506         }
1507
1508         error = ea_dealloc_block(ip);
1509
1510 out_quota:
1511         gfs2_quota_unhold(ip);
1512 out_alloc:
1513         gfs2_alloc_put(ip);
1514         return error;
1515 }
1516
1517 static const struct xattr_handler gfs2_xattr_user_handler = {
1518         .prefix = XATTR_USER_PREFIX,
1519         .flags  = GFS2_EATYPE_USR,
1520         .get    = gfs2_xattr_get,
1521         .set    = gfs2_xattr_set,
1522 };
1523
1524 static const struct xattr_handler gfs2_xattr_security_handler = {
1525         .prefix = XATTR_SECURITY_PREFIX,
1526         .flags  = GFS2_EATYPE_SECURITY,
1527         .get    = gfs2_xattr_get,
1528         .set    = gfs2_xattr_set,
1529 };
1530
1531 const struct xattr_handler *gfs2_xattr_handlers[] = {
1532         &gfs2_xattr_user_handler,
1533         &gfs2_xattr_security_handler,
1534         &gfs2_xattr_system_handler,
1535         NULL,
1536 };
1537