fs/gfs2/inode.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/posix_acl.h>
  16 #include <linux/sort.h>
  17 #include <linux/gfs2_ondisk.h>
  18 #include <linux/crc32.h>
  19
  20 #include "gfs2.h"
  21 #include "lm_interface.h"
  22 #include "incore.h"
  23 #include "acl.h"
  24 #include "bmap.h"
  25 #include "dir.h"
  26 #include "eattr.h"
  27 #include "glock.h"
  28 #include "glops.h"
  29 #include "inode.h"
  30 #include "log.h"
  31 #include "meta_io.h"
  32 #include "ops_address.h"
  33 #include "ops_file.h"
  34 #include "ops_inode.h"
  35 #include "quota.h"
  36 #include "rgrp.h"
  37 #include "trans.h"
  38 #include "util.h"
  39
  40 /**
  41  * gfs2_inode_attr_in - Copy attributes from the dinode into the VFS inode
  42  * @ip: The GFS2 inode (with embedded disk inode data)
  43  * @inode:  The Linux VFS inode
  44  *
  45  */
  46
  47 void gfs2_inode_attr_in(struct gfs2_inode *ip)
  48 {
  49         struct inode *inode = &ip->i_inode;
  50
  51         inode->i_ino = ip->i_num.no_addr;
  52
  53         switch (ip->i_di.di_mode & S_IFMT) {
  54         case S_IFBLK:
  55         case S_IFCHR:
  56                 inode->i_rdev = MKDEV(ip->i_di.di_major, ip->i_di.di_minor);
  57                 break;
  58         default:
  59                 inode->i_rdev = 0;
  60                 break;
  61         };
  62
  63         inode->i_mode = ip->i_di.di_mode;
  64         inode->i_nlink = ip->i_di.di_nlink;
  65         inode->i_uid = ip->i_di.di_uid;
  66         inode->i_gid = ip->i_di.di_gid;
  67         i_size_write(inode, ip->i_di.di_size);
  68         inode->i_atime.tv_sec = ip->i_di.di_atime;
  69         inode->i_mtime.tv_sec = ip->i_di.di_mtime;
  70         inode->i_ctime.tv_sec = ip->i_di.di_ctime;
  71         inode->i_atime.tv_nsec = 0;
  72         inode->i_mtime.tv_nsec = 0;
  73         inode->i_ctime.tv_nsec = 0;
  74         inode->i_blksize = PAGE_SIZE;
  75         inode->i_blocks = ip->i_di.di_blocks <<
  76                 (GFS2_SB(inode)->sd_sb.sb_bsize_shift - GFS2_BASIC_BLOCK_SHIFT);
  77
  78         if (ip->i_di.di_flags & GFS2_DIF_IMMUTABLE)
  79                 inode->i_flags |= S_IMMUTABLE;
  80         else
  81                 inode->i_flags &= ~S_IMMUTABLE;
  82
  83         if (ip->i_di.di_flags & GFS2_DIF_APPENDONLY)
  84                 inode->i_flags |= S_APPEND;
  85         else
  86                 inode->i_flags &= ~S_APPEND;
  87 }
  88
  89 /**
  90  * gfs2_inode_attr_out - Copy attributes from VFS inode into the dinode
  91  * @ip: The GFS2 inode
  92  *
  93  * Only copy out the attributes that we want the VFS layer
  94  * to be able to modify.
  95  */
  96
  97 void gfs2_inode_attr_out(struct gfs2_inode *ip)
  98 {
  99         struct inode *inode = &ip->i_inode;
 100
 101         gfs2_assert_withdraw(GFS2_SB(inode),
 102                 (ip->i_di.di_mode & S_IFMT) == (inode->i_mode & S_IFMT));
 103         ip->i_di.di_mode = inode->i_mode;
 104         ip->i_di.di_uid = inode->i_uid;
 105         ip->i_di.di_gid = inode->i_gid;
 106         ip->i_di.di_atime = inode->i_atime.tv_sec;
 107         ip->i_di.di_mtime = inode->i_mtime.tv_sec;
 108         ip->i_di.di_ctime = inode->i_ctime.tv_sec;
 109 }
 110
 111 static int iget_test(struct inode *inode, void *opaque)
 112 {
 113         struct gfs2_inode *ip = GFS2_I(inode);
 114         struct gfs2_inum *inum = opaque;
 115
 116         if (ip && ip->i_num.no_addr == inum->no_addr)
 117                 return 1;
 118
 119         return 0;
 120 }
 121
 122 static int iget_set(struct inode *inode, void *opaque)
 123 {
 124         struct gfs2_inode *ip = GFS2_I(inode);
 125         struct gfs2_inum *inum = opaque;
 126
 127         ip->i_num = *inum;
 128         return 0;
 129 }
 130
 131 struct inode *gfs2_ilookup(struct super_block *sb, struct gfs2_inum *inum)
 132 {
 133         return ilookup5(sb, (unsigned long)inum->no_formal_ino,
 134                         iget_test, inum);
 135 }
 136
 137 static struct inode *gfs2_iget(struct super_block *sb, struct gfs2_inum *inum)
 138 {
 139         return iget5_locked(sb, (unsigned long)inum->no_formal_ino,
 140                      iget_test, iget_set, inum);
 141 }
 142
 143 /**
 144  * gfs2_inode_lookup - Lookup an inode
 145  * @sb: The super block
 146  * @inum: The inode number
 147  * @type: The type of the inode
 148  *
 149  * Returns: A VFS inode, or an error
 150  */
 151
 152 struct inode *gfs2_inode_lookup(struct super_block *sb, struct gfs2_inum *inum, unsigned int type)
 153 {
 154         struct inode *inode = gfs2_iget(sb, inum);
 155         struct gfs2_inode *ip = GFS2_I(inode);
 156         struct gfs2_glock *io_gl;
 157         int error;
 158
 159         if (inode->i_state & I_NEW) {
 160                 struct gfs2_sbd *sdp = GFS2_SB(inode);
 161                 umode_t mode = DT2IF(type);
 162                 inode->u.generic_ip = ip;
 163                 inode->i_mode = mode;
 164
 165                 if (S_ISREG(mode)) {
 166                         inode->i_op = &gfs2_file_iops;
 167                         inode->i_fop = &gfs2_file_fops;
 168                         inode->i_mapping->a_ops = &gfs2_file_aops;
 169                 } else if (S_ISDIR(mode)) {
 170                         inode->i_op = &gfs2_dir_iops;
 171                         inode->i_fop = &gfs2_dir_fops;
 172                 } else if (S_ISLNK(mode)) {
 173                         inode->i_op = &gfs2_symlink_iops;
 174                 } else {
 175                         inode->i_op = &gfs2_dev_iops;
 176                 }
 177
 178                 error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
 179                 if (unlikely(error))
 180                         goto fail;
 181                 ip->i_gl->gl_object = ip;
 182
 183                 error = gfs2_glock_get(sdp, inum->no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
 184                 if (unlikely(error))
 185                         goto fail_put;
 186
 187                 ip->i_vn = ip->i_gl->gl_vn - 1;
 188                 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
 189                 if (unlikely(error))
 190                         goto fail_iopen;
 191
 192                 gfs2_glock_put(io_gl);
 193                 unlock_new_inode(inode);
 194         }
 195
 196         return inode;
 197 fail_iopen:
 198         gfs2_glock_put(io_gl);
 199 fail_put:
 200         ip->i_gl->gl_object = NULL;
 201         gfs2_glock_put(ip->i_gl);
 202 fail:
 203         iput(inode);
 204         return ERR_PTR(error);
 205 }
 206
 207 /**
 208  * gfs2_inode_refresh - Refresh the incore copy of the dinode
 209  * @ip: The GFS2 inode
 210  *
 211  * Returns: errno
 212  */
 213
 214 int gfs2_inode_refresh(struct gfs2_inode *ip)
 215 {
 216         struct buffer_head *dibh;
 217         int error;
 218
 219         error = gfs2_meta_inode_buffer(ip, &dibh);
 220         if (error)
 221                 return error;
 222
 223         if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
 224                 brelse(dibh);
 225                 return -EIO;
 226         }
 227
 228         gfs2_dinode_in(&ip->i_di, dibh->b_data);
 229
 230         brelse(dibh);
 231
 232         if (ip->i_num.no_addr != ip->i_di.di_num.no_addr) {
 233                 if (gfs2_consist_inode(ip))
 234                         gfs2_dinode_print(&ip->i_di);
 235                 return -EIO;
 236         }
 237         if (ip->i_num.no_formal_ino != ip->i_di.di_num.no_formal_ino)
 238                 return -ESTALE;
 239
 240         ip->i_vn = ip->i_gl->gl_vn;
 241
 242         return 0;
 243 }
 244
 245 int gfs2_dinode_dealloc(struct gfs2_inode *ip)
 246 {
 247         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 248         struct gfs2_alloc *al;
 249         struct gfs2_rgrpd *rgd;
 250         int error;
 251
 252         if (ip->i_di.di_blocks != 1) {
 253                 if (gfs2_consist_inode(ip))
 254                         gfs2_dinode_print(&ip->i_di);
 255                 return -EIO;
 256         }
 257
 258         al = gfs2_alloc_get(ip);
 259
 260         error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 261         if (error)
 262                 goto out;
 263
 264         error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
 265         if (error)
 266                 goto out_qs;
 267
 268         rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
 269         if (!rgd) {
 270                 gfs2_consist_inode(ip);
 271                 error = -EIO;
 272                 goto out_rindex_relse;
 273         }
 274
 275         error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
 276                                    &al->al_rgd_gh);
 277         if (error)
 278                 goto out_rindex_relse;
 279
 280         error = gfs2_trans_begin(sdp, RES_RG_BIT +
 281                                  RES_STATFS + RES_QUOTA, 1);
 282         if (error)
 283                 goto out_rg_gunlock;
 284
 285         gfs2_trans_add_gl(ip->i_gl);
 286
 287         gfs2_free_di(rgd, ip);
 288
 289         gfs2_trans_end(sdp);
 290         clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
 291
 292 out_rg_gunlock:
 293         gfs2_glock_dq_uninit(&al->al_rgd_gh);
 294 out_rindex_relse:
 295         gfs2_glock_dq_uninit(&al->al_ri_gh);
 296 out_qs:
 297         gfs2_quota_unhold(ip);
 298 out:
 299         gfs2_alloc_put(ip);
 300         return error;
 301 }
 302
 303 /**
 304  * gfs2_change_nlink - Change nlink count on inode
 305  * @ip: The GFS2 inode
 306  * @diff: The change in the nlink count required
 307  *
 308  * Returns: errno
 309  */
 310
 311 int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
 312 {
 313         struct gfs2_sbd *sdp = ip->i_inode.i_sb->s_fs_info;
 314         struct buffer_head *dibh;
 315         uint32_t nlink;
 316         int error;
 317
 318         BUG_ON(ip->i_di.di_nlink != ip->i_inode.i_nlink);
 319         nlink = ip->i_di.di_nlink + diff;
 320
 321         /* If we are reducing the nlink count, but the new value ends up being
 322            bigger than the old one, we must have underflowed. */
 323         if (diff < 0 && nlink > ip->i_di.di_nlink) {
 324                 if (gfs2_consist_inode(ip))
 325                         gfs2_dinode_print(&ip->i_di);
 326                 return -EIO;
 327         }
 328
 329         error = gfs2_meta_inode_buffer(ip, &dibh);
 330         if (error)
 331                 return error;
 332
 333         ip->i_di.di_nlink = nlink;
 334         ip->i_di.di_ctime = get_seconds();
 335         ip->i_inode.i_nlink = nlink;
 336
 337         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 338         gfs2_dinode_out(&ip->i_di, dibh->b_data);
 339         brelse(dibh);
 340         mark_inode_dirty(&ip->i_inode);
 341
 342         if (ip->i_di.di_nlink == 0) {
 343                 struct gfs2_rgrpd *rgd;
 344                 struct gfs2_holder ri_gh, rg_gh;
 345
 346                 error = gfs2_rindex_hold(sdp, &ri_gh);
 347                 if (error)
 348                         goto out;
 349                 error = -EIO;
 350                 rgd = gfs2_blk2rgrpd(sdp, ip->i_num.no_addr);
 351                 if (!rgd)
 352                         goto out_norgrp;
 353                 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &rg_gh);
 354                 if (error)
 355                         goto out_norgrp;
 356
 357                 gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
 358                 gfs2_glock_dq_uninit(&rg_gh);
 359 out_norgrp:
 360                 gfs2_glock_dq_uninit(&ri_gh);
 361         }
 362 out:
 363         return error;
 364 }
 365
 366 struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
 367 {
 368         struct qstr qstr;
 369         gfs2_str2qstr(&qstr, name);
 370         return gfs2_lookupi(dip, &qstr, 1, NULL);
 371 }
 372
 373
 374 /**
 375  * gfs2_lookupi - Look up a filename in a directory and return its inode
 376  * @d_gh: An initialized holder for the directory glock
 377  * @name: The name of the inode to look for
 378  * @is_root: If 1, ignore the caller's permissions
 379  * @i_gh: An uninitialized holder for the new inode glock
 380  *
 381  * There will always be a vnode (Linux VFS inode) for the d_gh inode unless
 382  * @is_root is true.
 383  *
 384  * Returns: errno
 385  */
 386
 387 struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
 388                            int is_root, struct nameidata *nd)
 389
 390 {
 391         struct super_block *sb = dir->i_sb;
 392         struct gfs2_inode *dip = GFS2_I(dir);
 393         struct gfs2_holder d_gh;
 394         struct gfs2_inum inum;
 395         unsigned int type;
 396         int error = 0;
 397         struct inode *inode = NULL;
 398
 399         if (!name->len || name->len > GFS2_FNAMESIZE)
 400                 return ERR_PTR(-ENAMETOOLONG);
 401
 402         if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
 403             (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
 404              dir == sb->s_root->d_inode)) {
 405                 igrab(dir);
 406                 return dir;
 407         }
 408
 409         error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
 410         if (error)
 411                 return ERR_PTR(error);
 412
 413         if (!is_root) {
 414                 error = permission(dir, MAY_EXEC, NULL);
 415                 if (error)
 416                         goto out;
 417         }
 418
 419         error = gfs2_dir_search(dir, name, &inum, &type);
 420         if (error)
 421                 goto out;
 422
 423         inode = gfs2_inode_lookup(sb, &inum, type);
 424
 425 out:
 426         gfs2_glock_dq_uninit(&d_gh);
 427         if (error == -ENOENT)
 428                 return NULL;
 429         return inode;
 430 }
 431
 432 static int pick_formal_ino_1(struct gfs2_sbd *sdp, uint64_t *formal_ino)
 433 {
 434         struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
 435         struct buffer_head *bh;
 436         struct gfs2_inum_range ir;
 437         int error;
 438
 439         error = gfs2_trans_begin(sdp, RES_DINODE, 0);
 440         if (error)
 441                 return error;
 442         mutex_lock(&sdp->sd_inum_mutex);
 443
 444         error = gfs2_meta_inode_buffer(ip, &bh);
 445         if (error) {
 446                 mutex_unlock(&sdp->sd_inum_mutex);
 447                 gfs2_trans_end(sdp);
 448                 return error;
 449         }
 450
 451         gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
 452
 453         if (ir.ir_length) {
 454                 *formal_ino = ir.ir_start++;
 455                 ir.ir_length--;
 456                 gfs2_trans_add_bh(ip->i_gl, bh, 1);
 457                 gfs2_inum_range_out(&ir,
 458                                     bh->b_data + sizeof(struct gfs2_dinode));
 459                 brelse(bh);
 460                 mutex_unlock(&sdp->sd_inum_mutex);
 461                 gfs2_trans_end(sdp);
 462                 return 0;
 463         }
 464
 465         brelse(bh);
 466
 467         mutex_unlock(&sdp->sd_inum_mutex);
 468         gfs2_trans_end(sdp);
 469
 470         return 1;
 471 }
 472
 473 static int pick_formal_ino_2(struct gfs2_sbd *sdp, uint64_t *formal_ino)
 474 {
 475         struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
 476         struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode);
 477         struct gfs2_holder gh;
 478         struct buffer_head *bh;
 479         struct gfs2_inum_range ir;
 480         int error;
 481
 482         error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
 483         if (error)
 484                 return error;
 485
 486         error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
 487         if (error)
 488                 goto out;
 489         mutex_lock(&sdp->sd_inum_mutex);
 490
 491         error = gfs2_meta_inode_buffer(ip, &bh);
 492         if (error)
 493                 goto out_end_trans;
 494
 495         gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
 496
 497         if (!ir.ir_length) {
 498                 struct buffer_head *m_bh;
 499                 uint64_t x, y;
 500
 501                 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
 502                 if (error)
 503                         goto out_brelse;
 504
 505                 x = *(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode));
 506                 x = y = be64_to_cpu(x);
 507                 ir.ir_start = x;
 508                 ir.ir_length = GFS2_INUM_QUANTUM;
 509                 x += GFS2_INUM_QUANTUM;
 510                 if (x < y)
 511                         gfs2_consist_inode(m_ip);
 512                 x = cpu_to_be64(x);
 513                 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
 514                 *(uint64_t *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = x;
 515
 516                 brelse(m_bh);
 517         }
 518
 519         *formal_ino = ir.ir_start++;
 520         ir.ir_length--;
 521
 522         gfs2_trans_add_bh(ip->i_gl, bh, 1);
 523         gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
 524
 525  out_brelse:
 526         brelse(bh);
 527
 528  out_end_trans:
 529         mutex_unlock(&sdp->sd_inum_mutex);
 530         gfs2_trans_end(sdp);
 531
 532  out:
 533         gfs2_glock_dq_uninit(&gh);
 534
 535         return error;
 536 }
 537
 538 static int pick_formal_ino(struct gfs2_sbd *sdp, uint64_t *inum)
 539 {
 540         int error;
 541
 542         error = pick_formal_ino_1(sdp, inum);
 543         if (error <= 0)
 544                 return error;
 545
 546         error = pick_formal_ino_2(sdp, inum);
 547
 548         return error;
 549 }
 550
 551 /**
 552  * create_ok - OK to create a new on-disk inode here?
 553  * @dip:  Directory in which dinode is to be created
 554  * @name:  Name of new dinode
 555  * @mode:
 556  *
 557  * Returns: errno
 558  */
 559
 560 static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
 561                      unsigned int mode)
 562 {
 563         int error;
 564
 565         error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
 566         if (error)
 567                 return error;
 568
 569         /*  Don't create entries in an unlinked directory  */
 570         if (!dip->i_di.di_nlink)
 571                 return -EPERM;
 572
 573         error = gfs2_dir_search(&dip->i_inode, name, NULL, NULL);
 574         switch (error) {
 575         case -ENOENT:
 576                 error = 0;
 577                 break;
 578         case 0:
 579                 return -EEXIST;
 580         default:
 581                 return error;
 582         }
 583
 584         if (dip->i_di.di_entries == (uint32_t)-1)
 585                 return -EFBIG;
 586         if (S_ISDIR(mode) && dip->i_di.di_nlink == (uint32_t)-1)
 587                 return -EMLINK;
 588
 589         return 0;
 590 }
 591
 592 static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
 593                                unsigned int *uid, unsigned int *gid)
 594 {
 595         if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
 596             (dip->i_di.di_mode & S_ISUID) &&
 597             dip->i_di.di_uid) {
 598                 if (S_ISDIR(*mode))
 599                         *mode |= S_ISUID;
 600                 else if (dip->i_di.di_uid != current->fsuid)
 601                         *mode &= ~07111;
 602                 *uid = dip->i_di.di_uid;
 603         } else
 604                 *uid = current->fsuid;
 605
 606         if (dip->i_di.di_mode & S_ISGID) {
 607                 if (S_ISDIR(*mode))
 608                         *mode |= S_ISGID;
 609                 *gid = dip->i_di.di_gid;
 610         } else
 611                 *gid = current->fsgid;
 612 }
 613
 614 static int alloc_dinode(struct gfs2_inode *dip, struct gfs2_inum *inum,
 615                         u64 *generation)
 616 {
 617         struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 618         int error;
 619
 620         gfs2_alloc_get(dip);
 621
 622         dip->i_alloc.al_requested = RES_DINODE;
 623         error = gfs2_inplace_reserve(dip);
 624         if (error)
 625                 goto out;
 626
 627         error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0);
 628         if (error)
 629                 goto out_ipreserv;
 630
 631         inum->no_addr = gfs2_alloc_di(dip, generation);
 632
 633         gfs2_trans_end(sdp);
 634
 635 out_ipreserv:
 636         gfs2_inplace_release(dip);
 637
 638 out:
 639         gfs2_alloc_put(dip);
 640
 641         return error;
 642 }
 643
 644 /**
 645  * init_dinode - Fill in a new dinode structure
 646  * @dip: the directory this inode is being created in
 647  * @gl: The glock covering the new inode
 648  * @inum: the inode number
 649  * @mode: the file permissions
 650  * @uid:
 651  * @gid:
 652  *
 653  */
 654
 655 static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
 656                         const struct gfs2_inum *inum, unsigned int mode,
 657                         unsigned int uid, unsigned int gid,
 658                         const u64 *generation)
 659 {
 660         struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 661         struct gfs2_dinode *di;
 662         struct buffer_head *dibh;
 663
 664         dibh = gfs2_meta_new(gl, inum->no_addr);
 665         gfs2_trans_add_bh(gl, dibh, 1);
 666         gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
 667         gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
 668         di = (struct gfs2_dinode *)dibh->b_data;
 669
 670         di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
 671         di->di_num.no_addr = cpu_to_be64(inum->no_addr);
 672         di->di_mode = cpu_to_be32(mode);
 673         di->di_uid = cpu_to_be32(uid);
 674         di->di_gid = cpu_to_be32(gid);
 675         di->di_nlink = cpu_to_be32(0);
 676         di->di_size = cpu_to_be64(0);
 677         di->di_blocks = cpu_to_be64(1);
 678         di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(get_seconds());
 679         di->di_major = di->di_minor = cpu_to_be32(0);
 680         di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
 681         di->di_generation = cpu_to_be64(*generation);
 682         di->di_flags = cpu_to_be32(0);
 683
 684         if (S_ISREG(mode)) {
 685                 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
 686                     gfs2_tune_get(sdp, gt_new_files_jdata))
 687                         di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
 688                 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) ||
 689                     gfs2_tune_get(sdp, gt_new_files_directio))
 690                         di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO);
 691         } else if (S_ISDIR(mode)) {
 692                 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
 693                                             GFS2_DIF_INHERIT_DIRECTIO);
 694                 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
 695                                             GFS2_DIF_INHERIT_JDATA);
 696         }
 697
 698         di->__pad1 = 0;
 699         di->di_height = cpu_to_be32(0);
 700         di->__pad2 = 0;
 701         di->__pad3 = 0;
 702         di->di_depth = cpu_to_be16(0);
 703         di->di_entries = cpu_to_be32(0);
 704         memset(&di->__pad4, 0, sizeof(di->__pad4));
 705         di->di_eattr = cpu_to_be64(0);
 706         memset(&di->di_reserved, 0, sizeof(di->di_reserved));
 707
 708         brelse(dibh);
 709 }
 710
 711 static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
 712                        unsigned int mode, const struct gfs2_inum *inum,
 713                        const u64 *generation)
 714 {
 715         struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 716         unsigned int uid, gid;
 717         int error;
 718
 719         munge_mode_uid_gid(dip, &mode, &uid, &gid);
 720         gfs2_alloc_get(dip);
 721
 722         error = gfs2_quota_lock(dip, uid, gid);
 723         if (error)
 724                 goto out;
 725
 726         error = gfs2_quota_check(dip, uid, gid);
 727         if (error)
 728                 goto out_quota;
 729
 730         error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0);
 731         if (error)
 732                 goto out_quota;
 733
 734         init_dinode(dip, gl, inum, mode, uid, gid, generation);
 735         gfs2_quota_change(dip, +1, uid, gid);
 736         gfs2_trans_end(sdp);
 737
 738 out_quota:
 739         gfs2_quota_unlock(dip);
 740 out:
 741         gfs2_alloc_put(dip);
 742         return error;
 743 }
 744
 745 static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
 746                        struct gfs2_inode *ip)
 747 {
 748         struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 749         struct gfs2_alloc *al;
 750         int alloc_required;
 751         struct buffer_head *dibh;
 752         int error;
 753
 754         al = gfs2_alloc_get(dip);
 755
 756         error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
 757         if (error)
 758                 goto fail;
 759
 760         error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
 761         if (alloc_required < 0)
 762                 goto fail;
 763         if (alloc_required) {
 764                 error = gfs2_quota_check(dip, dip->i_di.di_uid,
 765                                          dip->i_di.di_gid);
 766                 if (error)
 767                         goto fail_quota_locks;
 768
 769                 al->al_requested = sdp->sd_max_dirres;
 770
 771                 error = gfs2_inplace_reserve(dip);
 772                 if (error)
 773                         goto fail_quota_locks;
 774
 775                 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
 776                                          al->al_rgd->rd_ri.ri_length +
 777                                          2 * RES_DINODE +
 778                                          RES_STATFS + RES_QUOTA, 0);
 779                 if (error)
 780                         goto fail_ipreserv;
 781         } else {
 782                 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
 783                 if (error)
 784                         goto fail_quota_locks;
 785         }
 786
 787         error = gfs2_dir_add(&dip->i_inode, name, &ip->i_num, IF2DT(ip->i_di.di_mode));
 788         if (error)
 789                 goto fail_end_trans;
 790
 791         error = gfs2_meta_inode_buffer(ip, &dibh);
 792         if (error)
 793                 goto fail_end_trans;
 794         ip->i_di.di_nlink = 1;
 795         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
 796         gfs2_dinode_out(&ip->i_di, dibh->b_data);
 797         brelse(dibh);
 798         return 0;
 799
 800 fail_end_trans:
 801         gfs2_trans_end(sdp);
 802
 803 fail_ipreserv:
 804         if (dip->i_alloc.al_rgd)
 805                 gfs2_inplace_release(dip);
 806
 807 fail_quota_locks:
 808         gfs2_quota_unlock(dip);
 809
 810 fail:
 811         gfs2_alloc_put(dip);
 812         return error;
 813 }
 814
 815 /**
 816  * gfs2_createi - Create a new inode
 817  * @ghs: An array of two holders
 818  * @name: The name of the new file
 819  * @mode: the permissions on the new inode
 820  *
 821  * @ghs[0] is an initialized holder for the directory
 822  * @ghs[1] is the holder for the inode lock
 823  *
 824  * If the return value is not NULL, the glocks on both the directory and the new
 825  * file are held.  A transaction has been started and an inplace reservation
 826  * is held, as well.
 827  *
 828  * Returns: An inode
 829  */
 830
 831 struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
 832                            unsigned int mode)
 833 {
 834         struct inode *inode;
 835         struct gfs2_inode *dip = ghs->gh_gl->gl_object;
 836         struct inode *dir = &dip->i_inode;
 837         struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
 838         struct gfs2_inum inum;
 839         int error;
 840         u64 generation;
 841
 842         if (!name->len || name->len > GFS2_FNAMESIZE)
 843                 return ERR_PTR(-ENAMETOOLONG);
 844
 845         gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
 846         error = gfs2_glock_nq(ghs);
 847         if (error)
 848                 goto fail;
 849
 850         error = create_ok(dip, name, mode);
 851         if (error)
 852                 goto fail_gunlock;
 853
 854         error = pick_formal_ino(sdp, &inum.no_formal_ino);
 855         if (error)
 856                 goto fail_gunlock;
 857
 858         error = alloc_dinode(dip, &inum, &generation);
 859         if (error)
 860                 goto fail_gunlock;
 861
 862         if (inum.no_addr < dip->i_num.no_addr) {
 863                 gfs2_glock_dq(ghs);
 864
 865                 error = gfs2_glock_nq_num(sdp, inum.no_addr,
 866                                           &gfs2_inode_glops, LM_ST_EXCLUSIVE,
 867                                           GL_SKIP, ghs + 1);
 868                 if (error) {
 869                         return ERR_PTR(error);
 870                 }
 871
 872                 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
 873                 error = gfs2_glock_nq(ghs);
 874                 if (error) {
 875                         gfs2_glock_dq_uninit(ghs + 1);
 876                         return ERR_PTR(error);
 877                 }
 878
 879                 error = create_ok(dip, name, mode);
 880                 if (error)
 881                         goto fail_gunlock2;
 882         } else {
 883                 error = gfs2_glock_nq_num(sdp, inum.no_addr,
 884                                           &gfs2_inode_glops, LM_ST_EXCLUSIVE,
 885                                           GL_SKIP, ghs + 1);
 886                 if (error)
 887                         goto fail_gunlock;
 888         }
 889
 890         error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation);
 891         if (error)
 892                 goto fail_gunlock2;
 893
 894         inode = gfs2_inode_lookup(dir->i_sb, &inum, IF2DT(mode));
 895         if (IS_ERR(inode))
 896                 goto fail_gunlock2;
 897
 898         error = gfs2_inode_refresh(GFS2_I(inode));
 899         if (error)
 900                 goto fail_iput;
 901
 902         error = gfs2_acl_create(dip, GFS2_I(inode));
 903         if (error)
 904                 goto fail_iput;
 905
 906         error = link_dinode(dip, name, GFS2_I(inode));
 907         if (error)
 908                 goto fail_iput;
 909
 910         if (!inode)
 911                 return ERR_PTR(-ENOMEM);
 912         return inode;
 913
 914 fail_iput:
 915         iput(inode);
 916 fail_gunlock2:
 917         gfs2_glock_dq_uninit(ghs + 1);
 918 fail_gunlock:
 919         gfs2_glock_dq(ghs);
 920 fail:
 921         return ERR_PTR(error);
 922 }
 923
 924 /**
 925  * gfs2_rmdiri - Remove a directory
 926  * @dip: The parent directory of the directory to be removed
 927  * @name: The name of the directory to be removed
 928  * @ip: The GFS2 inode of the directory to be removed
 929  *
 930  * Assumes Glocks on dip and ip are held
 931  *
 932  * Returns: errno
 933  */
 934
 935 int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
 936                 struct gfs2_inode *ip)
 937 {
 938         struct qstr dotname;
 939         int error;
 940
 941         if (ip->i_di.di_entries != 2) {
 942                 if (gfs2_consist_inode(ip))
 943                         gfs2_dinode_print(&ip->i_di);
 944                 return -EIO;
 945         }
 946
 947         error = gfs2_dir_del(dip, name);
 948         if (error)
 949                 return error;
 950
 951         error = gfs2_change_nlink(dip, -1);
 952         if (error)
 953                 return error;
 954
 955         gfs2_str2qstr(&dotname, ".");
 956         error = gfs2_dir_del(ip, &dotname);
 957         if (error)
 958                 return error;
 959
 960         gfs2_str2qstr(&dotname, "..");
 961         error = gfs2_dir_del(ip, &dotname);
 962         if (error)
 963                 return error;
 964
 965         error = gfs2_change_nlink(ip, -2);
 966         if (error)
 967                 return error;
 968
 969         return error;
 970 }
 971
 972 /*
 973  * gfs2_unlink_ok - check to see that a inode is still in a directory
 974  * @dip: the directory
 975  * @name: the name of the file
 976  * @ip: the inode
 977  *
 978  * Assumes that the lock on (at least) @dip is held.
 979  *
 980  * Returns: 0 if the parent/child relationship is correct, errno if it isn't
 981  */
 982
 983 int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
 984                    struct gfs2_inode *ip)
 985 {
 986         struct gfs2_inum inum;
 987         unsigned int type;
 988         int error;
 989
 990         if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
 991                 return -EPERM;
 992
 993         if ((dip->i_di.di_mode & S_ISVTX) &&
 994             dip->i_di.di_uid != current->fsuid &&
 995             ip->i_di.di_uid != current->fsuid && !capable(CAP_FOWNER))
 996                 return -EPERM;
 997
 998         if (IS_APPEND(&dip->i_inode))
 999                 return -EPERM;
1000
1001         error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
1002         if (error)
1003                 return error;
1004
1005         error = gfs2_dir_search(&dip->i_inode, name, &inum, &type);
1006         if (error)
1007                 return error;
1008
1009         if (!gfs2_inum_equal(&inum, &ip->i_num))
1010                 return -ENOENT;
1011
1012         if (IF2DT(ip->i_di.di_mode) != type) {
1013                 gfs2_consist_inode(dip);
1014                 return -EIO;
1015         }
1016
1017         return 0;
1018 }
1019
1020 /*
1021  * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1022  * @this: move this
1023  * @to: to here
1024  *
1025  * Follow @to back to the root and make sure we don't encounter @this
1026  * Assumes we already hold the rename lock.
1027  *
1028  * Returns: errno
1029  */
1030
1031 int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1032 {
1033         struct inode *dir = &to->i_inode;
1034         struct super_block *sb = dir->i_sb;
1035         struct inode *tmp;
1036         struct qstr dotdot;
1037         int error = 0;
1038
1039         gfs2_str2qstr(&dotdot, "..");
1040
1041         igrab(dir);
1042
1043         for (;;) {
1044                 if (dir == &this->i_inode) {
1045                         error = -EINVAL;
1046                         break;
1047                 }
1048                 if (dir == sb->s_root->d_inode) {
1049                         error = 0;
1050                         break;
1051                 }
1052
1053                 tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
1054                 if (IS_ERR(tmp)) {
1055                         error = PTR_ERR(tmp);
1056                         break;
1057                 }
1058
1059                 iput(dir);
1060                 dir = tmp;
1061         }
1062
1063         iput(dir);
1064
1065         return error;
1066 }
1067
1068 /**
1069  * gfs2_readlinki - return the contents of a symlink
1070  * @ip: the symlink's inode
1071  * @buf: a pointer to the buffer to be filled
1072  * @len: a pointer to the length of @buf
1073  *
1074  * If @buf is too small, a piece of memory is kmalloc()ed and needs
1075  * to be freed by the caller.
1076  *
1077  * Returns: errno
1078  */
1079
1080 int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
1081 {
1082         struct gfs2_holder i_gh;
1083         struct buffer_head *dibh;
1084         unsigned int x;
1085         int error;
1086
1087         gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
1088         error = gfs2_glock_nq_atime(&i_gh);
1089         if (error) {
1090                 gfs2_holder_uninit(&i_gh);
1091                 return error;
1092         }
1093
1094         if (!ip->i_di.di_size) {
1095                 gfs2_consist_inode(ip);
1096                 error = -EIO;
1097                 goto out;
1098         }
1099
1100         error = gfs2_meta_inode_buffer(ip, &dibh);
1101         if (error)
1102                 goto out;
1103
1104         x = ip->i_di.di_size + 1;
1105         if (x > *len) {
1106                 *buf = kmalloc(x, GFP_KERNEL);
1107                 if (!*buf) {
1108                         error = -ENOMEM;
1109                         goto out_brelse;
1110                 }
1111         }
1112
1113         memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
1114         *len = x;
1115
1116 out_brelse:
1117         brelse(dibh);
1118 out:
1119         gfs2_glock_dq_uninit(&i_gh);
1120         return error;
1121 }
1122
1123 /**
1124  * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1125  *       conditionally update the inode's atime
1126  * @gh: the holder to acquire
1127  *
1128  * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1129  * Update if the difference between the current time and the inode's current
1130  * atime is greater than an interval specified at mount.
1131  *
1132  * Returns: errno
1133  */
1134
1135 int gfs2_glock_nq_atime(struct gfs2_holder *gh)
1136 {
1137         struct gfs2_glock *gl = gh->gh_gl;
1138         struct gfs2_sbd *sdp = gl->gl_sbd;
1139         struct gfs2_inode *ip = gl->gl_object;
1140         int64_t curtime, quantum = gfs2_tune_get(sdp, gt_atime_quantum);
1141         unsigned int state;
1142         int flags;
1143         int error;
1144
1145         if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
1146             gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
1147             gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops))
1148                 return -EINVAL;
1149
1150         state = gh->gh_state;
1151         flags = gh->gh_flags;
1152
1153         error = gfs2_glock_nq(gh);
1154         if (error)
1155                 return error;
1156
1157         if (test_bit(SDF_NOATIME, &sdp->sd_flags) ||
1158             (sdp->sd_vfs->s_flags & MS_RDONLY))
1159                 return 0;
1160
1161         curtime = get_seconds();
1162         if (curtime - ip->i_di.di_atime >= quantum) {
1163                 gfs2_glock_dq(gh);
1164                 gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY,
1165                                    gh);
1166                 error = gfs2_glock_nq(gh);
1167                 if (error)
1168                         return error;
1169
1170                 /* Verify that atime hasn't been updated while we were
1171                    trying to get exclusive lock. */
1172
1173                 curtime = get_seconds();
1174                 if (curtime - ip->i_di.di_atime >= quantum) {
1175                         struct buffer_head *dibh;
1176
1177                         error = gfs2_trans_begin(sdp, RES_DINODE, 0);
1178                         if (error == -EROFS)
1179                                 return 0;
1180                         if (error)
1181                                 goto fail;
1182
1183                         error = gfs2_meta_inode_buffer(ip, &dibh);
1184                         if (error)
1185                                 goto fail_end_trans;
1186
1187                         ip->i_di.di_atime = curtime;
1188
1189                         gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1190                         gfs2_dinode_out(&ip->i_di, dibh->b_data);
1191                         brelse(dibh);
1192
1193                         gfs2_trans_end(sdp);
1194                 }
1195
1196                 /* If someone else has asked for the glock,
1197                    unlock and let them have it. Then reacquire
1198                    in the original state. */
1199                 if (gfs2_glock_is_blocking(gl)) {
1200                         gfs2_glock_dq(gh);
1201                         gfs2_holder_reinit(state, flags, gh);
1202                         return gfs2_glock_nq(gh);
1203                 }
1204         }
1205
1206         return 0;
1207
1208 fail_end_trans:
1209         gfs2_trans_end(sdp);
1210 fail:
1211         gfs2_glock_dq(gh);
1212         return error;
1213 }
1214
1215 /**
1216  * glock_compare_atime - Compare two struct gfs2_glock structures for sort
1217  * @arg_a: the first structure
1218  * @arg_b: the second structure
1219  *
1220  * Returns: 1 if A > B
1221  *         -1 if A < B
1222  *          0 if A = B
1223  */
1224
1225 static int glock_compare_atime(const void *arg_a, const void *arg_b)
1226 {
1227         struct gfs2_holder *gh_a = *(struct gfs2_holder **)arg_a;
1228         struct gfs2_holder *gh_b = *(struct gfs2_holder **)arg_b;
1229         struct lm_lockname *a = &gh_a->gh_gl->gl_name;
1230         struct lm_lockname *b = &gh_b->gh_gl->gl_name;
1231         int ret = 0;
1232
1233         if (a->ln_number > b->ln_number)
1234                 ret = 1;
1235         else if (a->ln_number < b->ln_number)
1236                 ret = -1;
1237         else {
1238                 if (gh_a->gh_state == LM_ST_SHARED &&
1239                     gh_b->gh_state == LM_ST_EXCLUSIVE)
1240                         ret = 1;
1241                 else if (gh_a->gh_state == LM_ST_SHARED &&
1242                          (gh_b->gh_flags & GL_ATIME))
1243                         ret = 1;
1244         }
1245
1246         return ret;
1247 }
1248
1249 /**
1250  * gfs2_glock_nq_m_atime - acquire multiple glocks where one may need an
1251  *      atime update
1252  * @num_gh: the number of structures
1253  * @ghs: an array of struct gfs2_holder structures
1254  *
1255  * Returns: 0 on success (all glocks acquired),
1256  *          errno on failure (no glocks acquired)
1257  */
1258
1259 int gfs2_glock_nq_m_atime(unsigned int num_gh, struct gfs2_holder *ghs)
1260 {
1261         struct gfs2_holder **p;
1262         unsigned int x;
1263         int error = 0;
1264
1265         if (!num_gh)
1266                 return 0;
1267
1268         if (num_gh == 1) {
1269                 ghs->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC);
1270                 if (ghs->gh_flags & GL_ATIME)
1271                         error = gfs2_glock_nq_atime(ghs);
1272                 else
1273                         error = gfs2_glock_nq(ghs);
1274                 return error;
1275         }
1276
1277         p = kcalloc(num_gh, sizeof(struct gfs2_holder *), GFP_KERNEL);
1278         if (!p)
1279                 return -ENOMEM;
1280
1281         for (x = 0; x < num_gh; x++)
1282                 p[x] = &ghs[x];
1283
1284         sort(p, num_gh, sizeof(struct gfs2_holder *), glock_compare_atime,NULL);
1285
1286         for (x = 0; x < num_gh; x++) {
1287                 p[x]->gh_flags &= ~(LM_FLAG_TRY | GL_ASYNC);
1288
1289                 if (p[x]->gh_flags & GL_ATIME)
1290                         error = gfs2_glock_nq_atime(p[x]);
1291                 else
1292                         error = gfs2_glock_nq(p[x]);
1293
1294                 if (error) {
1295                         while (x--)
1296                                 gfs2_glock_dq(p[x]);
1297                         break;
1298                 }
1299         }
1300
1301         kfree(p);
1302
1303         return error;
1304 }
1305
1306
1307 static int
1308 __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1309 {
1310         struct buffer_head *dibh;
1311         int error;
1312
1313         error = gfs2_meta_inode_buffer(ip, &dibh);
1314         if (!error) {
1315                 error = inode_setattr(&ip->i_inode, attr);
1316                 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
1317                 gfs2_inode_attr_out(ip);
1318
1319                 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1320                 gfs2_dinode_out(&ip->i_di, dibh->b_data);
1321                 brelse(dibh);
1322         }
1323         return error;
1324 }
1325
1326 /**
1327  * gfs2_setattr_simple -
1328  * @ip:
1329  * @attr:
1330  *
1331  * Called with a reference on the vnode.
1332  *
1333  * Returns: errno
1334  */
1335
1336 int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1337 {
1338         int error;
1339
1340         if (current->journal_info)
1341                 return __gfs2_setattr_simple(ip, attr);
1342
1343         error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
1344         if (error)
1345                 return error;
1346
1347         error = __gfs2_setattr_simple(ip, attr);
1348
1349         gfs2_trans_end(GFS2_SB(&ip->i_inode));
1350
1351         return error;
1352 }
1353