SAFE public projects git trees. - safe/jmp/linux-2.6/blob - fs/gfs2/eattr.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 v.2.
   8  */
   9
  10 #include <linux/sched.h>
  11 #include <linux/slab.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/completion.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/xattr.h>
  16 #include <linux/gfs2_ondisk.h>
  17 #include <asm/uaccess.h>
  18
  19 #include "gfs2.h"
  20 #include "lm_interface.h"
  21 #include "incore.h"
  22 #include "acl.h"
  23 #include "eaops.h"
  24 #include "eattr.h"
  25 #include "glock.h"
  26 #include "inode.h"
  27 #include "meta_io.h"
  28 #include "quota.h"
  29 #include "rgrp.h"
  30 #include "trans.h"
  31 #include "util.h"
  32
  33 /**
  34  * ea_calc_size - returns the acutal number of bytes the request will take up
  35  *                (not counting any unstuffed data blocks)
  36  * @sdp:
  37  * @er:
  38  * @size:
  39  *
  40  * Returns: 1 if the EA should be stuffed
  41  */
  42
  43 static int ea_calc_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er,
  44                         unsigned int *size)
  45 {
  46         *size = GFS2_EAREQ_SIZE_STUFFED(er);
  47         if (*size <= sdp->sd_jbsize)
  48                 return 1;
  49
  50         *size = GFS2_EAREQ_SIZE_UNSTUFFED(sdp, er);
  51
  52         return 0;
  53 }
  54
  55 static int ea_check_size(struct gfs2_sbd *sdp, struct gfs2_ea_request *er)
  56 {
  57         unsigned int size;
  58
  59         if (er->er_data_len > GFS2_EA_MAX_DATA_LEN)
  60                 return -ERANGE;
  61
  62         ea_calc_size(sdp, er, &size);
  63
  64         /* This can only happen with 512 byte blocks */
  65         if (size > sdp->sd_jbsize)
  66                 return -ERANGE;
  67
  68         return 0;
  69 }
  70
  71 typedef int (*ea_call_t) (struct gfs2_inode *ip,
  72                           struct buffer_head *bh,
  73                           struct gfs2_ea_header *ea,
  74                           struct gfs2_ea_header *prev,
  75                           void *private);
  76
  77 static int ea_foreach_i(struct gfs2_inode *ip, struct buffer_head *bh,
  78                         ea_call_t ea_call, void *data)
  79 {
  80         struct gfs2_ea_header *ea, *prev = NULL;
  81         int error = 0;
  82
  83         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_EA))
  84                 return -EIO;
  85
  86         for (ea = GFS2_EA_BH2FIRST(bh);; prev = ea, ea = GFS2_EA2NEXT(ea)) {
  87                 if (!GFS2_EA_REC_LEN(ea))
  88                         goto fail;
  89                 if (!(bh->b_data <= (char *)ea &&
  90                       (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         uint64_t *eablk, *end;
 119         int error;
 120
 121         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
 122                                DIO_START | DIO_WAIT, &bh);
 123         if (error)
 124                 return error;
 125
 126         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT)) {
 127                 error = ea_foreach_i(ip, bh, ea_call, data);
 128                 goto out;
 129         }
 130
 131         if (gfs2_metatype_check(ip->i_sbd, bh, GFS2_METATYPE_IN)) {
 132                 error = -EIO;
 133                 goto out;
 134         }
 135
 136         eablk = (uint64_t *)(bh->b_data + sizeof(struct gfs2_meta_header));
 137         end = eablk + ip->i_sbd->sd_inptrs;
 138
 139         for (; eablk < end; eablk++) {
 140                 uint64_t bn;
 141
 142                 if (!*eablk)
 143                         break;
 144                 bn = be64_to_cpu(*eablk);
 145
 146                 error = gfs2_meta_read(ip->i_gl, bn, DIO_START | DIO_WAIT,
 147                                        &eabh);
 148                 if (error)
 149                         break;
 150                 error = ea_foreach_i(ip, eabh, ea_call, data);
 151                 brelse(eabh);
 152                 if (error)
 153                         break;
 154         }
 155  out:
 156         brelse(bh);
 157
 158         return error;
 159 }
 160
 161 struct ea_find {
 162         struct gfs2_ea_request *ef_er;
 163         struct gfs2_ea_location *ef_el;
 164 };
 165
 166 static int ea_find_i(struct gfs2_inode *ip, struct buffer_head *bh,
 167                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 168                      void *private)
 169 {
 170         struct ea_find *ef = private;
 171         struct gfs2_ea_request *er = ef->ef_er;
 172
 173         if (ea->ea_type == GFS2_EATYPE_UNUSED)
 174                 return 0;
 175
 176         if (ea->ea_type == er->er_type) {
 177                 if (ea->ea_name_len == er->er_name_len &&
 178                     !memcmp(GFS2_EA2NAME(ea), er->er_name, ea->ea_name_len)) {
 179                         struct gfs2_ea_location *el = ef->ef_el;
 180                         get_bh(bh);
 181                         el->el_bh = bh;
 182                         el->el_ea = ea;
 183                         el->el_prev = prev;
 184                         return 1;
 185                 }
 186         }
 187
 188 #if 0
 189         else if ((ip->i_di.di_flags & GFS2_DIF_EA_PACKED) &&
 190                  er->er_type == GFS2_EATYPE_SYS)
 191                 return 1;
 192 #endif
 193
 194         return 0;
 195 }
 196
 197 int gfs2_ea_find(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 198                  struct gfs2_ea_location *el)
 199 {
 200         struct ea_find ef;
 201         int error;
 202
 203         ef.ef_er = er;
 204         ef.ef_el = el;
 205
 206         memset(el, 0, sizeof(struct gfs2_ea_location));
 207
 208         error = ea_foreach(ip, ea_find_i, &ef);
 209         if (error > 0)
 210                 return 0;
 211
 212         return error;
 213 }
 214
 215 /**
 216  * ea_dealloc_unstuffed -
 217  * @ip:
 218  * @bh:
 219  * @ea:
 220  * @prev:
 221  * @private:
 222  *
 223  * Take advantage of the fact that all unstuffed blocks are
 224  * allocated from the same RG.  But watch, this may not always
 225  * be true.
 226  *
 227  * Returns: errno
 228  */
 229
 230 static int ea_dealloc_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 231                                 struct gfs2_ea_header *ea,
 232                                 struct gfs2_ea_header *prev, void *private)
 233 {
 234         int *leave = private;
 235         struct gfs2_sbd *sdp = ip->i_sbd;
 236         struct gfs2_rgrpd *rgd;
 237         struct gfs2_holder rg_gh;
 238         struct buffer_head *dibh;
 239         uint64_t *dataptrs, bn = 0;
 240         uint64_t bstart = 0;
 241         unsigned int blen = 0;
 242         unsigned int blks = 0;
 243         unsigned int x;
 244         int error;
 245
 246         if (GFS2_EA_IS_STUFFED(ea))
 247                 return 0;
 248
 249         dataptrs = GFS2_EA2DATAPTRS(ea);
 250         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++)
 251                 if (*dataptrs) {
 252                         blks++;
 253                         bn = be64_to_cpu(*dataptrs);
 254                 }
 255         if (!blks)
 256                 return 0;
 257
 258         rgd = gfs2_blk2rgrpd(sdp, bn);
 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_ri.ri_length +
 269                                  RES_DINODE + RES_EATTR + RES_STATFS +
 270                                  RES_QUOTA, blks);
 271         if (error)
 272                 goto out_gunlock;
 273
 274         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 275
 276         dataptrs = GFS2_EA2DATAPTRS(ea);
 277         for (x = 0; x < ea->ea_num_ptrs; x++, dataptrs++) {
 278                 if (!*dataptrs)
 279                         break;
 280                 bn = be64_to_cpu(*dataptrs);
 281
 282                 if (bstart + blen == bn)
 283                         blen++;
 284                 else {
 285                         if (bstart)
 286                                 gfs2_free_meta(ip, bstart, blen);
 287                         bstart = bn;
 288                         blen = 1;
 289                 }
 290
 291                 *dataptrs = 0;
 292                 if (!ip->i_di.di_blocks)
 293                         gfs2_consist_inode(ip);
 294                 ip->i_di.di_blocks--;
 295         }
 296         if (bstart)
 297                 gfs2_free_meta(ip, bstart, blen);
 298
 299         if (prev && !leave) {
 300                 uint32_t len;
 301
 302                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 303                 prev->ea_rec_len = cpu_to_be32(len);
 304
 305                 if (GFS2_EA_IS_LAST(ea))
 306                         prev->ea_flags |= GFS2_EAFLAG_LAST;
 307         } else {
 308                 ea->ea_type = GFS2_EATYPE_UNUSED;
 309                 ea->ea_num_ptrs = 0;
 310         }
 311
 312         error = gfs2_meta_inode_buffer(ip, &dibh);
 313         if (!error) {
 314                 ip->i_di.di_ctime = get_seconds();
 315                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 316                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
 317                 brelse(dibh);
 318         }
 319
 320         gfs2_trans_end(sdp);
 321
 322  out_gunlock:
 323         gfs2_glock_dq_uninit(&rg_gh);
 324
 325         return error;
 326 }
 327
 328 static int ea_remove_unstuffed(struct gfs2_inode *ip, struct buffer_head *bh,
 329                                struct gfs2_ea_header *ea,
 330                                struct gfs2_ea_header *prev, int leave)
 331 {
 332         struct gfs2_alloc *al;
 333         int error;
 334
 335         al = gfs2_alloc_get(ip);
 336
 337         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 338         if (error)
 339                 goto out_alloc;
 340
 341         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
 342         if (error)
 343                 goto out_quota;
 344
 345         error = ea_dealloc_unstuffed(ip,
 346                                      bh, ea, prev,
 347                                      (leave) ? &error : NULL);
 348
 349         gfs2_glock_dq_uninit(&al->al_ri_gh);
 350
 351  out_quota:
 352         gfs2_quota_unhold(ip);
 353
 354  out_alloc:
 355         gfs2_alloc_put(ip);
 356
 357         return error;
 358 }
 359
 360 struct ea_list {
 361         struct gfs2_ea_request *ei_er;
 362         unsigned int ei_size;
 363 };
 364
 365 static int ea_list_i(struct gfs2_inode *ip, struct buffer_head *bh,
 366                      struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 367                      void *private)
 368 {
 369         struct ea_list *ei = private;
 370         struct gfs2_ea_request *er = ei->ei_er;
 371         unsigned int ea_size = GFS2_EA_STRLEN(ea);
 372
 373         if (ea->ea_type == GFS2_EATYPE_UNUSED)
 374                 return 0;
 375
 376         if (er->er_data_len) {
 377                 char *prefix;
 378                 unsigned int l;
 379                 char c = 0;
 380
 381                 if (ei->ei_size + ea_size > er->er_data_len)
 382                         return -ERANGE;
 383
 384                 if (ea->ea_type == GFS2_EATYPE_USR) {
 385                         prefix = "user.";
 386                         l = 5;
 387                 } else {
 388                         prefix = "system.";
 389                         l = 7;
 390                 }
 391
 392                 memcpy(er->er_data + ei->ei_size,
 393                        prefix, l);
 394                 memcpy(er->er_data + ei->ei_size + l,
 395                        GFS2_EA2NAME(ea),
 396                        ea->ea_name_len);
 397                 memcpy(er->er_data + ei->ei_size +
 398                        ea_size - 1,
 399                        &c, 1);
 400         }
 401
 402         ei->ei_size += ea_size;
 403
 404         return 0;
 405 }
 406
 407 /**
 408  * gfs2_ea_list -
 409  * @ip:
 410  * @er:
 411  *
 412  * Returns: actual size of data on success, -errno on error
 413  */
 414
 415 int gfs2_ea_list(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 416 {
 417         struct gfs2_holder i_gh;
 418         int error;
 419
 420         if (!er->er_data || !er->er_data_len) {
 421                 er->er_data = NULL;
 422                 er->er_data_len = 0;
 423         }
 424
 425         error = gfs2_glock_nq_init(ip->i_gl,
 426                                   LM_ST_SHARED, LM_FLAG_ANY,
 427                                   &i_gh);
 428         if (error)
 429                 return error;
 430
 431         if (ip->i_di.di_eattr) {
 432                 struct ea_list ei = { .ei_er = er, .ei_size = 0 };
 433
 434                 error = ea_foreach(ip, ea_list_i, &ei);
 435                 if (!error)
 436                         error = ei.ei_size;
 437         }
 438
 439         gfs2_glock_dq_uninit(&i_gh);
 440
 441         return error;
 442 }
 443
 444 /**
 445  * ea_get_unstuffed - actually copies the unstuffed data into the
 446  *                    request buffer
 447  * @ip:
 448  * @ea:
 449  * @data:
 450  *
 451  * Returns: errno
 452  */
 453
 454 static int ea_get_unstuffed(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 455                             char *data)
 456 {
 457         struct gfs2_sbd *sdp = ip->i_sbd;
 458         struct buffer_head **bh;
 459         unsigned int amount = GFS2_EA_DATA_LEN(ea);
 460         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
 461         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
 462         unsigned int x;
 463         int error = 0;
 464
 465         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
 466         if (!bh)
 467                 return -ENOMEM;
 468
 469         for (x = 0; x < nptrs; x++) {
 470                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
 471                                        DIO_START, bh + x);
 472                 if (error) {
 473                         while (x--)
 474                                 brelse(bh[x]);
 475                         goto out;
 476                 }
 477                 dataptrs++;
 478         }
 479
 480         for (x = 0; x < nptrs; x++) {
 481                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
 482                 if (error) {
 483                         for (; x < nptrs; x++)
 484                                 brelse(bh[x]);
 485                         goto out;
 486                 }
 487                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
 488                         for (; x < nptrs; x++)
 489                                 brelse(bh[x]);
 490                         error = -EIO;
 491                         goto out;
 492                 }
 493
 494                 memcpy(data,
 495                        bh[x]->b_data + sizeof(struct gfs2_meta_header),
 496                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
 497
 498                 amount -= sdp->sd_jbsize;
 499                 data += sdp->sd_jbsize;
 500
 501                 brelse(bh[x]);
 502         }
 503
 504  out:
 505         kfree(bh);
 506
 507         return error;
 508 }
 509
 510 int gfs2_ea_get_copy(struct gfs2_inode *ip, struct gfs2_ea_location *el,
 511                      char *data)
 512 {
 513         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
 514                 memcpy(data,
 515                        GFS2_EA2DATA(el->el_ea),
 516                        GFS2_EA_DATA_LEN(el->el_ea));
 517                 return 0;
 518         } else
 519                 return ea_get_unstuffed(ip, el->el_ea, data);
 520 }
 521
 522 /**
 523  * gfs2_ea_get_i -
 524  * @ip:
 525  * @er:
 526  *
 527  * Returns: actual size of data on success, -errno on error
 528  */
 529
 530 int gfs2_ea_get_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 531 {
 532         struct gfs2_ea_location el;
 533         int error;
 534
 535         if (!ip->i_di.di_eattr)
 536                 return -ENODATA;
 537
 538         error = gfs2_ea_find(ip, er, &el);
 539         if (error)
 540                 return error;
 541         if (!el.el_ea)
 542                 return -ENODATA;
 543
 544         if (er->er_data_len) {
 545                 if (GFS2_EA_DATA_LEN(el.el_ea) > er->er_data_len)
 546                         error =  -ERANGE;
 547                 else
 548                         error = gfs2_ea_get_copy(ip, &el, er->er_data);
 549         }
 550         if (!error)
 551                 error = GFS2_EA_DATA_LEN(el.el_ea);
 552
 553         brelse(el.el_bh);
 554
 555         return error;
 556 }
 557
 558 /**
 559  * gfs2_ea_get -
 560  * @ip:
 561  * @er:
 562  *
 563  * Returns: actual size of data on success, -errno on error
 564  */
 565
 566 int gfs2_ea_get(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 567 {
 568         struct gfs2_holder i_gh;
 569         int error;
 570
 571         if (!er->er_name_len ||
 572             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
 573                 return -EINVAL;
 574         if (!er->er_data || !er->er_data_len) {
 575                 er->er_data = NULL;
 576                 er->er_data_len = 0;
 577         }
 578
 579         error = gfs2_glock_nq_init(ip->i_gl,
 580                                   LM_ST_SHARED, LM_FLAG_ANY,
 581                                   &i_gh);
 582         if (error)
 583                 return error;
 584
 585         error = gfs2_ea_ops[er->er_type]->eo_get(ip, er);
 586
 587         gfs2_glock_dq_uninit(&i_gh);
 588
 589         return error;
 590 }
 591
 592 /**
 593  * ea_alloc_blk - allocates a new block for extended attributes.
 594  * @ip: A pointer to the inode that's getting extended attributes
 595  * @bhp:
 596  *
 597  * Returns: errno
 598  */
 599
 600 static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
 601 {
 602         struct gfs2_sbd *sdp = ip->i_sbd;
 603         struct gfs2_ea_header *ea;
 604         uint64_t block;
 605
 606         block = gfs2_alloc_meta(ip);
 607
 608         *bhp = gfs2_meta_new(ip->i_gl, block);
 609         gfs2_trans_add_bh(ip->i_gl, *bhp, 1);
 610         gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
 611         gfs2_buffer_clear_tail(*bhp, sizeof(struct gfs2_meta_header));
 612
 613         ea = GFS2_EA_BH2FIRST(*bhp);
 614         ea->ea_rec_len = cpu_to_be32(sdp->sd_jbsize);
 615         ea->ea_type = GFS2_EATYPE_UNUSED;
 616         ea->ea_flags = GFS2_EAFLAG_LAST;
 617         ea->ea_num_ptrs = 0;
 618
 619         ip->i_di.di_blocks++;
 620
 621         return 0;
 622 }
 623
 624 /**
 625  * ea_write - writes the request info to an ea, creating new blocks if
 626  *            necessary
 627  * @ip:  inode that is being modified
 628  * @ea:  the location of the new ea in a block
 629  * @er: the write request
 630  *
 631  * Note: does not update ea_rec_len or the GFS2_EAFLAG_LAST bin of ea_flags
 632  *
 633  * returns : errno
 634  */
 635
 636 static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 637                     struct gfs2_ea_request *er)
 638 {
 639         struct gfs2_sbd *sdp = ip->i_sbd;
 640
 641         ea->ea_data_len = cpu_to_be32(er->er_data_len);
 642         ea->ea_name_len = er->er_name_len;
 643         ea->ea_type = er->er_type;
 644         ea->__pad = 0;
 645
 646         memcpy(GFS2_EA2NAME(ea), er->er_name, er->er_name_len);
 647
 648         if (GFS2_EAREQ_SIZE_STUFFED(er) <= sdp->sd_jbsize) {
 649                 ea->ea_num_ptrs = 0;
 650                 memcpy(GFS2_EA2DATA(ea), er->er_data, er->er_data_len);
 651         } else {
 652                 uint64_t *dataptr = GFS2_EA2DATAPTRS(ea);
 653                 const char *data = er->er_data;
 654                 unsigned int data_len = er->er_data_len;
 655                 unsigned int copy;
 656                 unsigned int x;
 657
 658                 ea->ea_num_ptrs = DIV_ROUND_UP(er->er_data_len, sdp->sd_jbsize);
 659                 for (x = 0; x < ea->ea_num_ptrs; x++) {
 660                         struct buffer_head *bh;
 661                         uint64_t block;
 662                         int mh_size = sizeof(struct gfs2_meta_header);
 663
 664                         block = gfs2_alloc_meta(ip);
 665
 666                         bh = gfs2_meta_new(ip->i_gl, block);
 667                         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 668                         gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
 669
 670                         ip->i_di.di_blocks++;
 671
 672                         copy = (data_len > sdp->sd_jbsize) ? sdp->sd_jbsize :
 673                                                              data_len;
 674                         memcpy(bh->b_data + mh_size, data, copy);
 675                         if (copy < sdp->sd_jbsize)
 676                                 memset(bh->b_data + mh_size + copy, 0,
 677                                        sdp->sd_jbsize - copy);
 678
 679                         *dataptr++ = cpu_to_be64((uint64_t)bh->b_blocknr);
 680                         data += copy;
 681                         data_len -= copy;
 682
 683                         brelse(bh);
 684                 }
 685
 686                 gfs2_assert_withdraw(sdp, !data_len);
 687         }
 688
 689         return 0;
 690 }
 691
 692 typedef int (*ea_skeleton_call_t) (struct gfs2_inode *ip,
 693                                    struct gfs2_ea_request *er,
 694                                    void *private);
 695
 696 static int ea_alloc_skeleton(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 697                              unsigned int blks,
 698                              ea_skeleton_call_t skeleton_call,
 699                              void *private)
 700 {
 701         struct gfs2_alloc *al;
 702         struct buffer_head *dibh;
 703         int error;
 704
 705         al = gfs2_alloc_get(ip);
 706
 707         error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 708         if (error)
 709                 goto out;
 710
 711         error = gfs2_quota_check(ip, ip->i_di.di_uid, ip->i_di.di_gid);
 712         if (error)
 713                 goto out_gunlock_q;
 714
 715         al->al_requested = blks;
 716
 717         error = gfs2_inplace_reserve(ip);
 718         if (error)
 719                 goto out_gunlock_q;
 720
 721         error = gfs2_trans_begin(ip->i_sbd,
 722                                  blks + al->al_rgd->rd_ri.ri_length +
 723                                  RES_DINODE + RES_STATFS + RES_QUOTA, 0);
 724         if (error)
 725                 goto out_ipres;
 726
 727         error = skeleton_call(ip, er, private);
 728         if (error)
 729                 goto out_end_trans;
 730
 731         error = gfs2_meta_inode_buffer(ip, &dibh);
 732         if (!error) {
 733                 if (er->er_flags & GFS2_ERF_MODE) {
 734                         gfs2_assert_withdraw(ip->i_sbd,
 735                                             (ip->i_di.di_mode & S_IFMT) ==
 736                                             (er->er_mode & S_IFMT));
 737                         ip->i_di.di_mode = er->er_mode;
 738                 }
 739                 ip->i_di.di_ctime = get_seconds();
 740                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 741                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
 742                 brelse(dibh);
 743         }
 744
 745  out_end_trans:
 746         gfs2_trans_end(ip->i_sbd);
 747
 748  out_ipres:
 749         gfs2_inplace_release(ip);
 750
 751  out_gunlock_q:
 752         gfs2_quota_unlock(ip);
 753
 754  out:
 755         gfs2_alloc_put(ip);
 756
 757         return error;
 758 }
 759
 760 static int ea_init_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 761                      void *private)
 762 {
 763         struct buffer_head *bh;
 764         int error;
 765
 766         error = ea_alloc_blk(ip, &bh);
 767         if (error)
 768                 return error;
 769
 770         ip->i_di.di_eattr = bh->b_blocknr;
 771         error = ea_write(ip, GFS2_EA_BH2FIRST(bh), er);
 772
 773         brelse(bh);
 774
 775         return error;
 776 }
 777
 778 /**
 779  * ea_init - initializes a new eattr block
 780  * @ip:
 781  * @er:
 782  *
 783  * Returns: errno
 784  */
 785
 786 static int ea_init(struct gfs2_inode *ip, struct gfs2_ea_request *er)
 787 {
 788         unsigned int jbsize = ip->i_sbd->sd_jbsize;
 789         unsigned int blks = 1;
 790
 791         if (GFS2_EAREQ_SIZE_STUFFED(er) > jbsize)
 792                 blks += DIV_ROUND_UP(er->er_data_len, jbsize);
 793
 794         return ea_alloc_skeleton(ip, er, blks, ea_init_i, NULL);
 795 }
 796
 797 static struct gfs2_ea_header *ea_split_ea(struct gfs2_ea_header *ea)
 798 {
 799         uint32_t ea_size = GFS2_EA_SIZE(ea);
 800         struct gfs2_ea_header *new = (struct gfs2_ea_header *)((char *)ea +
 801                                      ea_size);
 802         uint32_t new_size = GFS2_EA_REC_LEN(ea) - ea_size;
 803         int last = ea->ea_flags & GFS2_EAFLAG_LAST;
 804
 805         ea->ea_rec_len = cpu_to_be32(ea_size);
 806         ea->ea_flags ^= last;
 807
 808         new->ea_rec_len = cpu_to_be32(new_size);
 809         new->ea_flags = last;
 810
 811         return new;
 812 }
 813
 814 static void ea_set_remove_stuffed(struct gfs2_inode *ip,
 815                                   struct gfs2_ea_location *el)
 816 {
 817         struct gfs2_ea_header *ea = el->el_ea;
 818         struct gfs2_ea_header *prev = el->el_prev;
 819         uint32_t len;
 820
 821         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
 822
 823         if (!prev || !GFS2_EA_IS_STUFFED(ea)) {
 824                 ea->ea_type = GFS2_EATYPE_UNUSED;
 825                 return;
 826         } else if (GFS2_EA2NEXT(prev) != ea) {
 827                 prev = GFS2_EA2NEXT(prev);
 828                 gfs2_assert_withdraw(ip->i_sbd, GFS2_EA2NEXT(prev) == ea);
 829         }
 830
 831         len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
 832         prev->ea_rec_len = cpu_to_be32(len);
 833
 834         if (GFS2_EA_IS_LAST(ea))
 835                 prev->ea_flags |= GFS2_EAFLAG_LAST;
 836 }
 837
 838 struct ea_set {
 839         int ea_split;
 840
 841         struct gfs2_ea_request *es_er;
 842         struct gfs2_ea_location *es_el;
 843
 844         struct buffer_head *es_bh;
 845         struct gfs2_ea_header *es_ea;
 846 };
 847
 848 static int ea_set_simple_noalloc(struct gfs2_inode *ip, struct buffer_head *bh,
 849                                  struct gfs2_ea_header *ea, struct ea_set *es)
 850 {
 851         struct gfs2_ea_request *er = es->es_er;
 852         struct buffer_head *dibh;
 853         int error;
 854
 855         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + 2 * RES_EATTR, 0);
 856         if (error)
 857                 return error;
 858
 859         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 860
 861         if (es->ea_split)
 862                 ea = ea_split_ea(ea);
 863
 864         ea_write(ip, ea, er);
 865
 866         if (es->es_el)
 867                 ea_set_remove_stuffed(ip, es->es_el);
 868
 869         error = gfs2_meta_inode_buffer(ip, &dibh);
 870         if (error)
 871                 goto out;
 872
 873         if (er->er_flags & GFS2_ERF_MODE) {
 874                 gfs2_assert_withdraw(ip->i_sbd,
 875                         (ip->i_di.di_mode & S_IFMT) == (er->er_mode & S_IFMT));
 876                 ip->i_di.di_mode = er->er_mode;
 877         }
 878         ip->i_di.di_ctime = get_seconds();
 879         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 880         gfs2_dinode_out(&ip->i_di, dibh->b_data);
 881         brelse(dibh);
 882  out:
 883         gfs2_trans_end(ip->i_sbd);
 884
 885         return error;
 886 }
 887
 888 static int ea_set_simple_alloc(struct gfs2_inode *ip,
 889                                struct gfs2_ea_request *er, void *private)
 890 {
 891         struct ea_set *es = private;
 892         struct gfs2_ea_header *ea = es->es_ea;
 893         int error;
 894
 895         gfs2_trans_add_bh(ip->i_gl, es->es_bh, 1);
 896
 897         if (es->ea_split)
 898                 ea = ea_split_ea(ea);
 899
 900         error = ea_write(ip, ea, er);
 901         if (error)
 902                 return error;
 903
 904         if (es->es_el)
 905                 ea_set_remove_stuffed(ip, es->es_el);
 906
 907         return 0;
 908 }
 909
 910 static int ea_set_simple(struct gfs2_inode *ip, struct buffer_head *bh,
 911                          struct gfs2_ea_header *ea, struct gfs2_ea_header *prev,
 912                          void *private)
 913 {
 914         struct ea_set *es = private;
 915         unsigned int size;
 916         int stuffed;
 917         int error;
 918
 919         stuffed = ea_calc_size(ip->i_sbd, es->es_er, &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                                         ip->i_sbd->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 = ip->i_sbd;
 960         struct buffer_head *indbh, *newbh;
 961         uint64_t *eablk;
 962         int error;
 963         int mh_size = sizeof(struct gfs2_meta_header);
 964
 965         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
 966                 uint64_t *end;
 967
 968                 error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
 969                                        DIO_START | DIO_WAIT, &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 = (uint64_t *)(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                 uint64_t blk;
 993
 994                 blk = gfs2_alloc_meta(ip);
 995
 996                 indbh = gfs2_meta_new(ip->i_gl, blk);
 997                 gfs2_trans_add_bh(ip->i_gl, indbh, 1);
 998                 gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
 999                 gfs2_buffer_clear_tail(indbh, mh_size);
1000
1001                 eablk = (uint64_t *)(indbh->b_data + mh_size);
1002                 *eablk = cpu_to_be64(ip->i_di.di_eattr);
1003                 ip->i_di.di_eattr = blk;
1004                 ip->i_di.di_flags |= GFS2_DIF_EA_INDIRECT;
1005                 ip->i_di.di_blocks++;
1006
1007                 eablk++;
1008         }
1009
1010         error = ea_alloc_blk(ip, &newbh);
1011         if (error)
1012                 goto out;
1013
1014         *eablk = cpu_to_be64((uint64_t)newbh->b_blocknr);
1015         error = ea_write(ip, GFS2_EA_BH2FIRST(newbh), er);
1016         brelse(newbh);
1017         if (error)
1018                 goto out;
1019
1020         if (private)
1021                 ea_set_remove_stuffed(ip, (struct gfs2_ea_location *)private);
1022
1023  out:
1024         brelse(indbh);
1025
1026         return error;
1027 }
1028
1029 static int ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er,
1030                     struct gfs2_ea_location *el)
1031 {
1032         struct ea_set es;
1033         unsigned int blks = 2;
1034         int error;
1035
1036         memset(&es, 0, sizeof(struct ea_set));
1037         es.es_er = er;
1038         es.es_el = el;
1039
1040         error = ea_foreach(ip, ea_set_simple, &es);
1041         if (error > 0)
1042                 return 0;
1043         if (error)
1044                 return error;
1045
1046         if (!(ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT))
1047                 blks++;
1048         if (GFS2_EAREQ_SIZE_STUFFED(er) > ip->i_sbd->sd_jbsize)
1049                 blks += DIV_ROUND_UP(er->er_data_len, ip->i_sbd->sd_jbsize);
1050
1051         return ea_alloc_skeleton(ip, er, blks, ea_set_block, el);
1052 }
1053
1054 static int ea_set_remove_unstuffed(struct gfs2_inode *ip,
1055                                    struct gfs2_ea_location *el)
1056 {
1057         if (el->el_prev && GFS2_EA2NEXT(el->el_prev) != el->el_ea) {
1058                 el->el_prev = GFS2_EA2NEXT(el->el_prev);
1059                 gfs2_assert_withdraw(ip->i_sbd,
1060                                      GFS2_EA2NEXT(el->el_prev) == el->el_ea);
1061         }
1062
1063         return ea_remove_unstuffed(ip, el->el_bh, el->el_ea, el->el_prev,0);
1064 }
1065
1066 int gfs2_ea_set_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1067 {
1068         struct gfs2_ea_location el;
1069         int error;
1070
1071         if (!ip->i_di.di_eattr) {
1072                 if (er->er_flags & XATTR_REPLACE)
1073                         return -ENODATA;
1074                 return ea_init(ip, er);
1075         }
1076
1077         error = gfs2_ea_find(ip, er, &el);
1078         if (error)
1079                 return error;
1080
1081         if (el.el_ea) {
1082                 if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY) {
1083                         brelse(el.el_bh);
1084                         return -EPERM;
1085                 }
1086
1087                 error = -EEXIST;
1088                 if (!(er->er_flags & XATTR_CREATE)) {
1089                         int unstuffed = !GFS2_EA_IS_STUFFED(el.el_ea);
1090                         error = ea_set_i(ip, er, &el);
1091                         if (!error && unstuffed)
1092                                 ea_set_remove_unstuffed(ip, &el);
1093                 }
1094
1095                 brelse(el.el_bh);
1096         } else {
1097                 error = -ENODATA;
1098                 if (!(er->er_flags & XATTR_REPLACE))
1099                         error = ea_set_i(ip, er, NULL);
1100         }
1101
1102         return error;
1103 }
1104
1105 int gfs2_ea_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1106 {
1107         struct gfs2_holder i_gh;
1108         int error;
1109
1110         if (!er->er_name_len ||
1111             er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1112                 return -EINVAL;
1113         if (!er->er_data || !er->er_data_len) {
1114                 er->er_data = NULL;
1115                 er->er_data_len = 0;
1116         }
1117         error = ea_check_size(ip->i_sbd, er);
1118         if (error)
1119                 return error;
1120
1121         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1122         if (error)
1123                 return error;
1124
1125         if (IS_IMMUTABLE(ip->i_vnode))
1126                 error = -EPERM;
1127         else
1128                 error = gfs2_ea_ops[er->er_type]->eo_set(ip, er);
1129
1130         gfs2_glock_dq_uninit(&i_gh);
1131
1132         return error;
1133 }
1134
1135 static int ea_remove_stuffed(struct gfs2_inode *ip, struct gfs2_ea_location *el)
1136 {
1137         struct gfs2_ea_header *ea = el->el_ea;
1138         struct gfs2_ea_header *prev = el->el_prev;
1139         struct buffer_head *dibh;
1140         int error;
1141
1142         error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1143         if (error)
1144                 return error;
1145
1146         gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1147
1148         if (prev) {
1149                 uint32_t len;
1150
1151                 len = GFS2_EA_REC_LEN(prev) + GFS2_EA_REC_LEN(ea);
1152                 prev->ea_rec_len = cpu_to_be32(len);
1153
1154                 if (GFS2_EA_IS_LAST(ea))
1155                         prev->ea_flags |= GFS2_EAFLAG_LAST;
1156         } else
1157                 ea->ea_type = GFS2_EATYPE_UNUSED;
1158
1159         error = gfs2_meta_inode_buffer(ip, &dibh);
1160         if (!error) {
1161                 ip->i_di.di_ctime = get_seconds();
1162                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1163                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1164                 brelse(dibh);
1165         }
1166
1167         gfs2_trans_end(ip->i_sbd);
1168
1169         return error;
1170 }
1171
1172 int gfs2_ea_remove_i(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1173 {
1174         struct gfs2_ea_location el;
1175         int error;
1176
1177         if (!ip->i_di.di_eattr)
1178                 return -ENODATA;
1179
1180         error = gfs2_ea_find(ip, er, &el);
1181         if (error)
1182                 return error;
1183         if (!el.el_ea)
1184                 return -ENODATA;
1185
1186         if (GFS2_EA_IS_STUFFED(el.el_ea))
1187                 error = ea_remove_stuffed(ip, &el);
1188         else
1189                 error = ea_remove_unstuffed(ip, el.el_bh, el.el_ea, el.el_prev,
1190                                             0);
1191
1192         brelse(el.el_bh);
1193
1194         return error;
1195 }
1196
1197 /**
1198  * gfs2_ea_remove - sets (or creates or replaces) an extended attribute
1199  * @ip: pointer to the inode of the target file
1200  * @er: request information
1201  *
1202  * Returns: errno
1203  */
1204
1205 int gfs2_ea_remove(struct gfs2_inode *ip, struct gfs2_ea_request *er)
1206 {
1207         struct gfs2_holder i_gh;
1208         int error;
1209
1210         if (!er->er_name_len || er->er_name_len > GFS2_EA_MAX_NAME_LEN)
1211                 return -EINVAL;
1212
1213         error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &i_gh);
1214         if (error)
1215                 return error;
1216
1217         if (IS_IMMUTABLE(ip->i_vnode) || IS_APPEND(ip->i_vnode))
1218                 error = -EPERM;
1219         else
1220                 error = gfs2_ea_ops[er->er_type]->eo_remove(ip, er);
1221
1222         gfs2_glock_dq_uninit(&i_gh);
1223
1224         return error;
1225 }
1226
1227 static int ea_acl_chmod_unstuffed(struct gfs2_inode *ip,
1228                                   struct gfs2_ea_header *ea, char *data)
1229 {
1230         struct gfs2_sbd *sdp = ip->i_sbd;
1231         struct buffer_head **bh;
1232         unsigned int amount = GFS2_EA_DATA_LEN(ea);
1233         unsigned int nptrs = DIV_ROUND_UP(amount, sdp->sd_jbsize);
1234         uint64_t *dataptrs = GFS2_EA2DATAPTRS(ea);
1235         unsigned int x;
1236         int error;
1237
1238         bh = kcalloc(nptrs, sizeof(struct buffer_head *), GFP_KERNEL);
1239         if (!bh)
1240                 return -ENOMEM;
1241
1242         error = gfs2_trans_begin(sdp, nptrs + RES_DINODE, 0);
1243         if (error)
1244                 goto out;
1245
1246         for (x = 0; x < nptrs; x++) {
1247                 error = gfs2_meta_read(ip->i_gl, be64_to_cpu(*dataptrs),
1248                                        DIO_START, bh + x);
1249                 if (error) {
1250                         while (x--)
1251                                 brelse(bh[x]);
1252                         goto fail;
1253                 }
1254                 dataptrs++;
1255         }
1256
1257         for (x = 0; x < nptrs; x++) {
1258                 error = gfs2_meta_reread(sdp, bh[x], DIO_WAIT);
1259                 if (error) {
1260                         for (; x < nptrs; x++)
1261                                 brelse(bh[x]);
1262                         goto fail;
1263                 }
1264                 if (gfs2_metatype_check(sdp, bh[x], GFS2_METATYPE_ED)) {
1265                         for (; x < nptrs; x++)
1266                                 brelse(bh[x]);
1267                         error = -EIO;
1268                         goto fail;
1269                 }
1270
1271                 gfs2_trans_add_bh(ip->i_gl, bh[x], 1);
1272
1273                 memcpy(bh[x]->b_data + sizeof(struct gfs2_meta_header),
1274                        data,
1275                        (sdp->sd_jbsize > amount) ? amount : sdp->sd_jbsize);
1276
1277                 amount -= sdp->sd_jbsize;
1278                 data += sdp->sd_jbsize;
1279
1280                 brelse(bh[x]);
1281         }
1282
1283  out:
1284         kfree(bh);
1285
1286         return error;
1287
1288  fail:
1289         gfs2_trans_end(sdp);
1290         kfree(bh);
1291
1292         return error;
1293 }
1294
1295 int gfs2_ea_acl_chmod(struct gfs2_inode *ip, struct gfs2_ea_location *el,
1296                       struct iattr *attr, char *data)
1297 {
1298         struct buffer_head *dibh;
1299         int error;
1300
1301         if (GFS2_EA_IS_STUFFED(el->el_ea)) {
1302                 error = gfs2_trans_begin(ip->i_sbd, RES_DINODE + RES_EATTR, 0);
1303                 if (error)
1304                         return error;
1305
1306                 gfs2_trans_add_bh(ip->i_gl, el->el_bh, 1);
1307                 memcpy(GFS2_EA2DATA(el->el_ea),
1308                        data,
1309                        GFS2_EA_DATA_LEN(el->el_ea));
1310         } else
1311                 error = ea_acl_chmod_unstuffed(ip, el->el_ea, data);
1312
1313         if (error)
1314                 return error;
1315
1316         error = gfs2_meta_inode_buffer(ip, &dibh);
1317         if (!error) {
1318                 error = inode_setattr(ip->i_vnode, attr);
1319                 gfs2_assert_warn(ip->i_sbd, !error);
1320                 gfs2_inode_attr_out(ip);
1321                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1322                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1323                 brelse(dibh);
1324         }
1325
1326         gfs2_trans_end(ip->i_sbd);
1327
1328         return error;
1329 }
1330
1331 static int ea_dealloc_indirect(struct gfs2_inode *ip)
1332 {
1333         struct gfs2_sbd *sdp = ip->i_sbd;
1334         struct gfs2_rgrp_list rlist;
1335         struct buffer_head *indbh, *dibh;
1336         uint64_t *eablk, *end;
1337         unsigned int rg_blocks = 0;
1338         uint64_t bstart = 0;
1339         unsigned int blen = 0;
1340         unsigned int blks = 0;
1341         unsigned int x;
1342         int error;
1343
1344         memset(&rlist, 0, sizeof(struct gfs2_rgrp_list));
1345
1346         error = gfs2_meta_read(ip->i_gl, ip->i_di.di_eattr,
1347                                DIO_START | DIO_WAIT, &indbh);
1348         if (error)
1349                 return error;
1350
1351         if (gfs2_metatype_check(sdp, indbh, GFS2_METATYPE_IN)) {
1352                 error = -EIO;
1353                 goto out;
1354         }
1355
1356         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1357         end = eablk + sdp->sd_inptrs;
1358
1359         for (; eablk < end; eablk++) {
1360                 uint64_t bn;
1361
1362                 if (!*eablk)
1363                         break;
1364                 bn = be64_to_cpu(*eablk);
1365
1366                 if (bstart + blen == bn)
1367                         blen++;
1368                 else {
1369                         if (bstart)
1370                                 gfs2_rlist_add(sdp, &rlist, bstart);
1371                         bstart = bn;
1372                         blen = 1;
1373                 }
1374                 blks++;
1375         }
1376         if (bstart)
1377                 gfs2_rlist_add(sdp, &rlist, bstart);
1378         else
1379                 goto out;
1380
1381         gfs2_rlist_alloc(&rlist, LM_ST_EXCLUSIVE, 0);
1382
1383         for (x = 0; x < rlist.rl_rgrps; x++) {
1384                 struct gfs2_rgrpd *rgd;
1385                 rgd = rlist.rl_ghs[x].gh_gl->gl_object;
1386                 rg_blocks += rgd->rd_ri.ri_length;
1387         }
1388
1389         error = gfs2_glock_nq_m(rlist.rl_rgrps, rlist.rl_ghs);
1390         if (error)
1391                 goto out_rlist_free;
1392
1393         error = gfs2_trans_begin(sdp, rg_blocks + RES_DINODE +
1394                                  RES_INDIRECT + RES_STATFS +
1395                                  RES_QUOTA, blks);
1396         if (error)
1397                 goto out_gunlock;
1398
1399         gfs2_trans_add_bh(ip->i_gl, indbh, 1);
1400
1401         eablk = (uint64_t *)(indbh->b_data + sizeof(struct gfs2_meta_header));
1402         bstart = 0;
1403         blen = 0;
1404
1405         for (; eablk < end; eablk++) {
1406                 uint64_t bn;
1407
1408                 if (!*eablk)
1409                         break;
1410                 bn = be64_to_cpu(*eablk);
1411
1412                 if (bstart + blen == bn)
1413                         blen++;
1414                 else {
1415                         if (bstart)
1416                                 gfs2_free_meta(ip, bstart, blen);
1417                         bstart = bn;
1418                         blen = 1;
1419                 }
1420
1421                 *eablk = 0;
1422                 if (!ip->i_di.di_blocks)
1423                         gfs2_consist_inode(ip);
1424                 ip->i_di.di_blocks--;
1425         }
1426         if (bstart)
1427                 gfs2_free_meta(ip, bstart, blen);
1428
1429         ip->i_di.di_flags &= ~GFS2_DIF_EA_INDIRECT;
1430
1431         error = gfs2_meta_inode_buffer(ip, &dibh);
1432         if (!error) {
1433                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1434                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1435                 brelse(dibh);
1436         }
1437
1438         gfs2_trans_end(sdp);
1439
1440  out_gunlock:
1441         gfs2_glock_dq_m(rlist.rl_rgrps, rlist.rl_ghs);
1442
1443  out_rlist_free:
1444         gfs2_rlist_free(&rlist);
1445
1446  out:
1447         brelse(indbh);
1448
1449         return error;
1450 }
1451
1452 static int ea_dealloc_block(struct gfs2_inode *ip)
1453 {
1454         struct gfs2_sbd *sdp = ip->i_sbd;
1455         struct gfs2_alloc *al = &ip->i_alloc;
1456         struct gfs2_rgrpd *rgd;
1457         struct buffer_head *dibh;
1458         int error;
1459
1460         rgd = gfs2_blk2rgrpd(sdp, ip->i_di.di_eattr);
1461         if (!rgd) {
1462                 gfs2_consist_inode(ip);
1463                 return -EIO;
1464         }
1465
1466         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
1467                                    &al->al_rgd_gh);
1468         if (error)
1469                 return error;
1470
1471         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_DINODE +
1472                                  RES_STATFS + RES_QUOTA, 1);
1473         if (error)
1474                 goto out_gunlock;
1475
1476         gfs2_free_meta(ip, ip->i_di.di_eattr, 1);
1477
1478         ip->i_di.di_eattr = 0;
1479         if (!ip->i_di.di_blocks)
1480                 gfs2_consist_inode(ip);
1481         ip->i_di.di_blocks--;
1482
1483         error = gfs2_meta_inode_buffer(ip, &dibh);
1484         if (!error) {
1485                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1486                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1487                 brelse(dibh);
1488         }
1489
1490         gfs2_trans_end(sdp);
1491
1492  out_gunlock:
1493         gfs2_glock_dq_uninit(&al->al_rgd_gh);
1494
1495         return error;
1496 }
1497
1498 /**
1499  * gfs2_ea_dealloc - deallocate the extended attribute fork
1500  * @ip: the inode
1501  *
1502  * Returns: errno
1503  */
1504
1505 int gfs2_ea_dealloc(struct gfs2_inode *ip)
1506 {
1507         struct gfs2_alloc *al;
1508         int error;
1509
1510         al = gfs2_alloc_get(ip);
1511
1512         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1513         if (error)
1514                 goto out_alloc;
1515
1516         error = gfs2_rindex_hold(ip->i_sbd, &al->al_ri_gh);
1517         if (error)
1518                 goto out_quota;
1519
1520         error = ea_foreach(ip, ea_dealloc_unstuffed, NULL);
1521         if (error)
1522                 goto out_rindex;
1523
1524         if (ip->i_di.di_flags & GFS2_DIF_EA_INDIRECT) {
1525                 error = ea_dealloc_indirect(ip);
1526                 if (error)
1527                         goto out_rindex;
1528         }
1529
1530         error = ea_dealloc_block(ip);
1531
1532  out_rindex:
1533         gfs2_glock_dq_uninit(&al->al_ri_gh);
1534
1535  out_quota:
1536         gfs2_quota_unhold(ip);
1537
1538  out_alloc:
1539         gfs2_alloc_put(ip);
1540
1541         return error;
1542 }
1543