fs/gfs2/glops.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
   4  *
   5  * This copyrighted material is made available to anyone wishing to use,
   6  * modify, copy, or redistribute it subject to the terms and conditions
   7  * of the GNU General Public License version 2.
   8  */
   9
  10 #include <linux/spinlock.h>
  11 #include <linux/completion.h>
  12 #include <linux/buffer_head.h>
  13 #include <linux/gfs2_ondisk.h>
  14 #include <linux/bio.h>
  15 #include <linux/posix_acl.h>
  16
  17 #include "gfs2.h"
  18 #include "incore.h"
  19 #include "bmap.h"
  20 #include "glock.h"
  21 #include "glops.h"
  22 #include "inode.h"
  23 #include "log.h"
  24 #include "meta_io.h"
  25 #include "recovery.h"
  26 #include "rgrp.h"
  27 #include "util.h"
  28 #include "trans.h"
  29 #include "dir.h"
  30
  31 struct workqueue_struct *gfs2_freeze_wq;
  32
  33 static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
  34 {
  35         fs_err(gl->gl_sbd, "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page state 0x%lx\n",
  36                bh, (unsigned long long)bh->b_blocknr, bh->b_state,
  37                bh->b_page->mapping, bh->b_page->flags);
  38         fs_err(gl->gl_sbd, "AIL glock %u:%llu mapping %p\n",
  39                gl->gl_name.ln_type, gl->gl_name.ln_number,
  40                gfs2_glock2aspace(gl));
  41         gfs2_lm_withdraw(gl->gl_sbd, "AIL error\n");
  42 }
  43
  44 /**
  45  * __gfs2_ail_flush - remove all buffers for a given lock from the AIL
  46  * @gl: the glock
  47  * @fsync: set when called from fsync (not all buffers will be clean)
  48  *
  49  * None of the buffers should be dirty, locked, or pinned.
  50  */
  51
  52 static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync,
  53                              unsigned int nr_revokes)
  54 {
  55         struct gfs2_sbd *sdp = gl->gl_sbd;
  56         struct list_head *head = &gl->gl_ail_list;
  57         struct gfs2_bufdata *bd, *tmp;
  58         struct buffer_head *bh;
  59         const unsigned long b_state = (1UL << BH_Dirty)|(1UL << BH_Pinned)|(1UL << BH_Lock);
  60
  61         gfs2_log_lock(sdp);
  62         spin_lock(&sdp->sd_ail_lock);
  63         list_for_each_entry_safe_reverse(bd, tmp, head, bd_ail_gl_list) {
  64                 if (nr_revokes == 0)
  65                         break;
  66                 bh = bd->bd_bh;
  67                 if (bh->b_state & b_state) {
  68                         if (fsync)
  69                                 continue;
  70                         gfs2_ail_error(gl, bh);
  71                 }
  72                 gfs2_trans_add_revoke(sdp, bd);
  73                 nr_revokes--;
  74         }
  75         GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count));
  76         spin_unlock(&sdp->sd_ail_lock);
  77         gfs2_log_unlock(sdp);
  78 }
  79
  80
  81 static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
  82 {
  83         struct gfs2_sbd *sdp = gl->gl_sbd;
  84         struct gfs2_trans tr;
  85
  86         memset(&tr, 0, sizeof(tr));
  87         INIT_LIST_HEAD(&tr.tr_buf);
  88         INIT_LIST_HEAD(&tr.tr_databuf);
  89         tr.tr_revokes = atomic_read(&gl->gl_ail_count);
  90
  91         if (!tr.tr_revokes)
  92                 return;
  93
  94         /* A shortened, inline version of gfs2_trans_begin()
  95          * tr->alloced is not set since the transaction structure is
  96          * on the stack */
  97         tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
  98         tr.tr_ip = _RET_IP_;
  99         if (gfs2_log_reserve(sdp, tr.tr_reserved) < 0)
 100                 return;
 101         WARN_ON_ONCE(current->journal_info);
 102         current->journal_info = &tr;
 103
 104         __gfs2_ail_flush(gl, 0, tr.tr_revokes);
 105
 106         gfs2_trans_end(sdp);
 107         gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
 108 }
 109
 110 void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
 111 {
 112         struct gfs2_sbd *sdp = gl->gl_sbd;
 113         unsigned int revokes = atomic_read(&gl->gl_ail_count);
 114         unsigned int max_revokes = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
 115         int ret;
 116
 117         if (!revokes)
 118                 return;
 119
 120         while (revokes > max_revokes)
 121                 max_revokes += (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64);
 122
 123         ret = gfs2_trans_begin(sdp, 0, max_revokes);
 124         if (ret)
 125                 return;
 126         __gfs2_ail_flush(gl, fsync, max_revokes);
 127         gfs2_trans_end(sdp);
 128         gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
 129 }
 130
 131 /**
 132  * rgrp_go_sync - sync out the metadata for this glock
 133  * @gl: the glock
 134  *
 135  * Called when demoting or unlocking an EX glock.  We must flush
 136  * to disk all dirty buffers/pages relating to this glock, and must not
 137  * not return to caller to demote/unlock the glock until I/O is complete.
 138  */
 139
 140 static void rgrp_go_sync(struct gfs2_glock *gl)
 141 {
 142         struct gfs2_sbd *sdp = gl->gl_sbd;
 143         struct address_space *mapping = &sdp->sd_aspace;
 144         struct gfs2_rgrpd *rgd;
 145         int error;
 146
 147         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 148                 return;
 149         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 150
 151         gfs2_log_flush(sdp, gl, NORMAL_FLUSH);
 152         filemap_fdatawrite_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 153         error = filemap_fdatawait_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 154         mapping_set_error(mapping, error);
 155         gfs2_ail_empty_gl(gl);
 156
 157         spin_lock(&gl->gl_spin);
 158         rgd = gl->gl_object;
 159         if (rgd)
 160                 gfs2_free_clones(rgd);
 161         spin_unlock(&gl->gl_spin);
 162 }
 163
 164 /**
 165  * rgrp_go_inval - invalidate the metadata for this glock
 166  * @gl: the glock
 167  * @flags:
 168  *
 169  * We never used LM_ST_DEFERRED with resource groups, so that we
 170  * should always see the metadata flag set here.
 171  *
 172  */
 173
 174 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 175 {
 176         struct gfs2_sbd *sdp = gl->gl_sbd;
 177         struct address_space *mapping = &sdp->sd_aspace;
 178
 179         WARN_ON_ONCE(!(flags & DIO_METADATA));
 180         gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
 181         truncate_inode_pages_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 182
 183         if (gl->gl_object) {
 184                 struct gfs2_rgrpd *rgd = (struct gfs2_rgrpd *)gl->gl_object;
 185                 rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
 186         }
 187 }
 188
 189 /**
 190  * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
 191  * @gl: the glock protecting the inode
 192  *
 193  */
 194
 195 static void inode_go_sync(struct gfs2_glock *gl)
 196 {
 197         struct gfs2_inode *ip = gl->gl_object;
 198         struct address_space *metamapping = gfs2_glock2aspace(gl);
 199         int error;
 200
 201         if (ip && !S_ISREG(ip->i_inode.i_mode))
 202                 ip = NULL;
 203         if (ip) {
 204                 if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
 205                         unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
 206                 inode_dio_wait(&ip->i_inode);
 207         }
 208         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 209                 return;
 210
 211         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 212
 213         gfs2_log_flush(gl->gl_sbd, gl, NORMAL_FLUSH);
 214         filemap_fdatawrite(metamapping);
 215         if (ip) {
 216                 struct address_space *mapping = ip->i_inode.i_mapping;
 217                 filemap_fdatawrite(mapping);
 218                 error = filemap_fdatawait(mapping);
 219                 mapping_set_error(mapping, error);
 220         }
 221         error = filemap_fdatawait(metamapping);
 222         mapping_set_error(metamapping, error);
 223         gfs2_ail_empty_gl(gl);
 224         /*
 225          * Writeback of the data mapping may cause the dirty flag to be set
 226          * so we have to clear it again here.
 227          */
 228         smp_mb__before_atomic();
 229         clear_bit(GLF_DIRTY, &gl->gl_flags);
 230 }
 231
 232 /**
 233  * inode_go_inval - prepare a inode glock to be released
 234  * @gl: the glock
 235  * @flags:
 236  *
 237  * Normally we invalidate everything, but if we are moving into
 238  * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
 239  * can keep hold of the metadata, since it won't have changed.
 240  *
 241  */
 242
 243 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 244 {
 245         struct gfs2_inode *ip = gl->gl_object;
 246
 247         gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
 248
 249         if (flags & DIO_METADATA) {
 250                 struct address_space *mapping = gfs2_glock2aspace(gl);
 251                 truncate_inode_pages(mapping, 0);
 252                 if (ip) {
 253                         set_bit(GIF_INVALID, &ip->i_flags);
 254                         forget_all_cached_acls(&ip->i_inode);
 255                         gfs2_dir_hash_inval(ip);
 256                 }
 257         }
 258
 259         if (ip == GFS2_I(gl->gl_sbd->sd_rindex)) {
 260                 gfs2_log_flush(gl->gl_sbd, NULL, NORMAL_FLUSH);
 261                 gl->gl_sbd->sd_rindex_uptodate = 0;
 262         }
 263         if (ip && S_ISREG(ip->i_inode.i_mode))
 264                 truncate_inode_pages(ip->i_inode.i_mapping, 0);
 265 }
 266
 267 /**
 268  * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
 269  * @gl: the glock
 270  *
 271  * Returns: 1 if it's ok
 272  */
 273
 274 static int inode_go_demote_ok(const struct gfs2_glock *gl)
 275 {
 276         struct gfs2_sbd *sdp = gl->gl_sbd;
 277         struct gfs2_holder *gh;
 278
 279         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
 280                 return 0;
 281
 282         if (!list_empty(&gl->gl_holders)) {
 283                 gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
 284                 if (gh->gh_list.next != &gl->gl_holders)
 285                         return 0;
 286         }
 287
 288         return 1;
 289 }
 290
 291 /**
 292  * gfs2_set_nlink - Set the inode's link count based on on-disk info
 293  * @inode: The inode in question
 294  * @nlink: The link count
 295  *
 296  * If the link count has hit zero, it must never be raised, whatever the
 297  * on-disk inode might say. When new struct inodes are created the link
 298  * count is set to 1, so that we can safely use this test even when reading
 299  * in on disk information for the first time.
 300  */
 301
 302 static void gfs2_set_nlink(struct inode *inode, u32 nlink)
 303 {
 304         /*
 305          * We will need to review setting the nlink count here in the
 306          * light of the forthcoming ro bind mount work. This is a reminder
 307          * to do that.
 308          */
 309         if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
 310                 if (nlink == 0)
 311                         clear_nlink(inode);
 312                 else
 313                         set_nlink(inode, nlink);
 314         }
 315 }
 316
 317 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 318 {
 319         const struct gfs2_dinode *str = buf;
 320         struct timespec atime;
 321         u16 height, depth;
 322
 323         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
 324                 goto corrupt;
 325         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
 326         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
 327         ip->i_inode.i_rdev = 0;
 328         switch (ip->i_inode.i_mode & S_IFMT) {
 329         case S_IFBLK:
 330         case S_IFCHR:
 331                 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
 332                                            be32_to_cpu(str->di_minor));
 333                 break;
 334         };
 335
 336         i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid));
 337         i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid));
 338         gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
 339         i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
 340         gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
 341         atime.tv_sec = be64_to_cpu(str->di_atime);
 342         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
 343         if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
 344                 ip->i_inode.i_atime = atime;
 345         ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
 346         ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
 347         ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
 348         ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
 349
 350         ip->i_goal = be64_to_cpu(str->di_goal_meta);
 351         ip->i_generation = be64_to_cpu(str->di_generation);
 352
 353         ip->i_diskflags = be32_to_cpu(str->di_flags);
 354         ip->i_eattr = be64_to_cpu(str->di_eattr);
 355         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
 356         gfs2_set_inode_flags(&ip->i_inode);
 357         height = be16_to_cpu(str->di_height);
 358         if (unlikely(height > GFS2_MAX_META_HEIGHT))
 359                 goto corrupt;
 360         ip->i_height = (u8)height;
 361
 362         depth = be16_to_cpu(str->di_depth);
 363         if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
 364                 goto corrupt;
 365         ip->i_depth = (u8)depth;
 366         ip->i_entries = be32_to_cpu(str->di_entries);
 367
 368         if (S_ISREG(ip->i_inode.i_mode))
 369                 gfs2_set_aops(&ip->i_inode);
 370
 371         return 0;
 372 corrupt:
 373         gfs2_consist_inode(ip);
 374         return -EIO;
 375 }
 376
 377 /**
 378  * gfs2_inode_refresh - Refresh the incore copy of the dinode
 379  * @ip: The GFS2 inode
 380  *
 381  * Returns: errno
 382  */
 383
 384 int gfs2_inode_refresh(struct gfs2_inode *ip)
 385 {
 386         struct buffer_head *dibh;
 387         int error;
 388
 389         error = gfs2_meta_inode_buffer(ip, &dibh);
 390         if (error)
 391                 return error;
 392
 393         error = gfs2_dinode_in(ip, dibh->b_data);
 394         brelse(dibh);
 395         clear_bit(GIF_INVALID, &ip->i_flags);
 396
 397         return error;
 398 }
 399
 400 /**
 401  * inode_go_lock - operation done after an inode lock is locked by a process
 402  * @gl: the glock
 403  * @flags:
 404  *
 405  * Returns: errno
 406  */
 407
 408 static int inode_go_lock(struct gfs2_holder *gh)
 409 {
 410         struct gfs2_glock *gl = gh->gh_gl;
 411         struct gfs2_sbd *sdp = gl->gl_sbd;
 412         struct gfs2_inode *ip = gl->gl_object;
 413         int error = 0;
 414
 415         if (!ip || (gh->gh_flags & GL_SKIP))
 416                 return 0;
 417
 418         if (test_bit(GIF_INVALID, &ip->i_flags)) {
 419                 error = gfs2_inode_refresh(ip);
 420                 if (error)
 421                         return error;
 422         }
 423
 424         if (gh->gh_state != LM_ST_DEFERRED)
 425                 inode_dio_wait(&ip->i_inode);
 426
 427         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
 428             (gl->gl_state == LM_ST_EXCLUSIVE) &&
 429             (gh->gh_state == LM_ST_EXCLUSIVE)) {
 430                 spin_lock(&sdp->sd_trunc_lock);
 431                 if (list_empty(&ip->i_trunc_list))
 432                         list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
 433                 spin_unlock(&sdp->sd_trunc_lock);
 434                 wake_up(&sdp->sd_quota_wait);
 435                 return 1;
 436         }
 437
 438         return error;
 439 }
 440
 441 /**
 442  * inode_go_dump - print information about an inode
 443  * @seq: The iterator
 444  * @ip: the inode
 445  *
 446  */
 447
 448 static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
 449 {
 450         const struct gfs2_inode *ip = gl->gl_object;
 451         if (ip == NULL)
 452                 return;
 453         gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
 454                   (unsigned long long)ip->i_no_formal_ino,
 455                   (unsigned long long)ip->i_no_addr,
 456                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
 457                   (unsigned int)ip->i_diskflags,
 458                   (unsigned long long)i_size_read(&ip->i_inode));
 459 }
 460
 461 /**
 462  * freeze_go_sync - promote/demote the freeze glock
 463  * @gl: the glock
 464  * @state: the requested state
 465  * @flags:
 466  *
 467  */
 468
 469 static void freeze_go_sync(struct gfs2_glock *gl)
 470 {
 471         int error = 0;
 472         struct gfs2_sbd *sdp = gl->gl_sbd;
 473
 474         if (gl->gl_state == LM_ST_SHARED &&
 475             test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 476                 atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
 477                 error = freeze_super(sdp->sd_vfs);
 478                 if (error) {
 479                         printk(KERN_INFO "GFS2: couldn't freeze filesystem: %d\n", error);
 480                         gfs2_assert_withdraw(sdp, 0);
 481                 }
 482                 queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work);
 483                 gfs2_log_flush(sdp, NULL, FREEZE_FLUSH);
 484         }
 485 }
 486
 487 /**
 488  * freeze_go_xmote_bh - After promoting/demoting the freeze glock
 489  * @gl: the glock
 490  *
 491  */
 492
 493 static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
 494 {
 495         struct gfs2_sbd *sdp = gl->gl_sbd;
 496         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 497         struct gfs2_glock *j_gl = ip->i_gl;
 498         struct gfs2_log_header_host head;
 499         int error;
 500
 501         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 502                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 503
 504                 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
 505                 if (error)
 506                         gfs2_consist(sdp);
 507                 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
 508                         gfs2_consist(sdp);
 509
 510                 /*  Initialize some head of the log stuff  */
 511                 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
 512                         sdp->sd_log_sequence = head.lh_sequence + 1;
 513                         gfs2_log_pointers_init(sdp, head.lh_blkno);
 514                 }
 515         }
 516         return 0;
 517 }
 518
 519 /**
 520  * trans_go_demote_ok
 521  * @gl: the glock
 522  *
 523  * Always returns 0
 524  */
 525
 526 static int freeze_go_demote_ok(const struct gfs2_glock *gl)
 527 {
 528         return 0;
 529 }
 530
 531 /**
 532  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
 533  * @gl: the glock
 534  *
 535  * gl_spin lock is held while calling this
 536  */
 537 static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
 538 {
 539         struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object;
 540         struct gfs2_sbd *sdp = gl->gl_sbd;
 541
 542         if (!remote || (sdp->sd_vfs->s_flags & MS_RDONLY))
 543                 return;
 544
 545         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
 546             gl->gl_state == LM_ST_SHARED && ip) {
 547                 gl->gl_lockref.count++;
 548                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
 549                         gl->gl_lockref.count--;
 550         }
 551 }
 552
 553 const struct gfs2_glock_operations gfs2_meta_glops = {
 554         .go_type = LM_TYPE_META,
 555 };
 556
 557 const struct gfs2_glock_operations gfs2_inode_glops = {
 558         .go_sync = inode_go_sync,
 559         .go_inval = inode_go_inval,
 560         .go_demote_ok = inode_go_demote_ok,
 561         .go_lock = inode_go_lock,
 562         .go_dump = inode_go_dump,
 563         .go_type = LM_TYPE_INODE,
 564         .go_flags = GLOF_ASPACE,
 565 };
 566
 567 const struct gfs2_glock_operations gfs2_rgrp_glops = {
 568         .go_sync = rgrp_go_sync,
 569         .go_inval = rgrp_go_inval,
 570         .go_lock = gfs2_rgrp_go_lock,
 571         .go_unlock = gfs2_rgrp_go_unlock,
 572         .go_dump = gfs2_rgrp_dump,
 573         .go_type = LM_TYPE_RGRP,
 574         .go_flags = GLOF_LVB,
 575 };
 576
 577 const struct gfs2_glock_operations gfs2_freeze_glops = {
 578         .go_sync = freeze_go_sync,
 579         .go_xmote_bh = freeze_go_xmote_bh,
 580         .go_demote_ok = freeze_go_demote_ok,
 581         .go_type = LM_TYPE_NONDISK,
 582 };
 583
 584 const struct gfs2_glock_operations gfs2_iopen_glops = {
 585         .go_type = LM_TYPE_IOPEN,
 586         .go_callback = iopen_go_callback,
 587 };
 588
 589 const struct gfs2_glock_operations gfs2_flock_glops = {
 590         .go_type = LM_TYPE_FLOCK,
 591 };
 592
 593 const struct gfs2_glock_operations gfs2_nondisk_glops = {
 594         .go_type = LM_TYPE_NONDISK,
 595 };
 596
 597 const struct gfs2_glock_operations gfs2_quota_glops = {
 598         .go_type = LM_TYPE_QUOTA,
 599         .go_flags = GLOF_LVB,
 600 };
 601
 602 const struct gfs2_glock_operations gfs2_journal_glops = {
 603         .go_type = LM_TYPE_JOURNAL,
 604 };
 605
 606 const struct gfs2_glock_operations *gfs2_glops_list[] = {
 607         [LM_TYPE_META] = &gfs2_meta_glops,
 608         [LM_TYPE_INODE] = &gfs2_inode_glops,
 609         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
 610         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
 611         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
 612         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
 613         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
 614         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
 615 };
 616