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 static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
  32 {
  33         fs_err(gl->gl_sbd, "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page state 0x%lx\n",
  34                bh, (unsigned long long)bh->b_blocknr, bh->b_state,
  35                bh->b_page->mapping, bh->b_page->flags);
  36         fs_err(gl->gl_sbd, "AIL glock %u:%llu mapping %p\n",
  37                gl->gl_name.ln_type, gl->gl_name.ln_number,
  38                gfs2_glock2aspace(gl));
  39         gfs2_lm_withdraw(gl->gl_sbd, "AIL error\n");
  40 }
  41
  42 /**
  43  * __gfs2_ail_flush - remove all buffers for a given lock from the AIL
  44  * @gl: the glock
  45  * @fsync: set when called from fsync (not all buffers will be clean)
  46  *
  47  * None of the buffers should be dirty, locked, or pinned.
  48  */
  49
  50 static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync,
  51                              unsigned int nr_revokes)
  52 {
  53         struct gfs2_sbd *sdp = gl->gl_sbd;
  54         struct list_head *head = &gl->gl_ail_list;
  55         struct gfs2_bufdata *bd, *tmp;
  56         struct buffer_head *bh;
  57         const unsigned long b_state = (1UL << BH_Dirty)|(1UL << BH_Pinned)|(1UL << BH_Lock);
  58
  59         gfs2_log_lock(sdp);
  60         spin_lock(&sdp->sd_ail_lock);
  61         list_for_each_entry_safe_reverse(bd, tmp, head, bd_ail_gl_list) {
  62                 if (nr_revokes == 0)
  63                         break;
  64                 bh = bd->bd_bh;
  65                 if (bh->b_state & b_state) {
  66                         if (fsync)
  67                                 continue;
  68                         gfs2_ail_error(gl, bh);
  69                 }
  70                 gfs2_trans_add_revoke(sdp, bd);
  71                 nr_revokes--;
  72         }
  73         GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count));
  74         spin_unlock(&sdp->sd_ail_lock);
  75         gfs2_log_unlock(sdp);
  76 }
  77
  78
  79 static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
  80 {
  81         struct gfs2_sbd *sdp = gl->gl_sbd;
  82         struct gfs2_trans tr;
  83
  84         memset(&tr, 0, sizeof(tr));
  85         INIT_LIST_HEAD(&tr.tr_buf);
  86         INIT_LIST_HEAD(&tr.tr_databuf);
  87         tr.tr_revokes = atomic_read(&gl->gl_ail_count);
  88
  89         if (!tr.tr_revokes)
  90                 return;
  91
  92         /* A shortened, inline version of gfs2_trans_begin()
  93          * tr->alloced is not set since the transaction structure is
  94          * on the stack */
  95         tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
  96         tr.tr_ip = _RET_IP_;
  97         sb_start_intwrite(sdp->sd_vfs);
  98         if (gfs2_log_reserve(sdp, tr.tr_reserved) < 0) {
  99                 sb_end_intwrite(sdp->sd_vfs);
 100                 return;
 101         }
 102         WARN_ON_ONCE(current->journal_info);
 103         current->journal_info = &tr;
 104
 105         __gfs2_ail_flush(gl, 0, tr.tr_revokes);
 106
 107         gfs2_trans_end(sdp);
 108         gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
 109 }
 110
 111 void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
 112 {
 113         struct gfs2_sbd *sdp = gl->gl_sbd;
 114         unsigned int revokes = atomic_read(&gl->gl_ail_count);
 115         unsigned int max_revokes = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
 116         int ret;
 117
 118         if (!revokes)
 119                 return;
 120
 121         while (revokes > max_revokes)
 122                 max_revokes += (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64);
 123
 124         ret = gfs2_trans_begin(sdp, 0, max_revokes);
 125         if (ret)
 126                 return;
 127         __gfs2_ail_flush(gl, fsync, max_revokes);
 128         gfs2_trans_end(sdp);
 129         gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
 130 }
 131
 132 /**
 133  * rgrp_go_sync - sync out the metadata for this glock
 134  * @gl: the glock
 135  *
 136  * Called when demoting or unlocking an EX glock.  We must flush
 137  * to disk all dirty buffers/pages relating to this glock, and must not
 138  * not return to caller to demote/unlock the glock until I/O is complete.
 139  */
 140
 141 static void rgrp_go_sync(struct gfs2_glock *gl)
 142 {
 143         struct gfs2_sbd *sdp = gl->gl_sbd;
 144         struct address_space *mapping = &sdp->sd_aspace;
 145         struct gfs2_rgrpd *rgd;
 146         int error;
 147
 148         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 149                 return;
 150         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 151
 152         gfs2_log_flush(sdp, gl, NORMAL_FLUSH);
 153         filemap_fdatawrite_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 154         error = filemap_fdatawait_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 155         mapping_set_error(mapping, error);
 156         gfs2_ail_empty_gl(gl);
 157
 158         spin_lock(&gl->gl_spin);
 159         rgd = gl->gl_object;
 160         if (rgd)
 161                 gfs2_free_clones(rgd);
 162         spin_unlock(&gl->gl_spin);
 163 }
 164
 165 /**
 166  * rgrp_go_inval - invalidate the metadata for this glock
 167  * @gl: the glock
 168  * @flags:
 169  *
 170  * We never used LM_ST_DEFERRED with resource groups, so that we
 171  * should always see the metadata flag set here.
 172  *
 173  */
 174
 175 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 176 {
 177         struct gfs2_sbd *sdp = gl->gl_sbd;
 178         struct address_space *mapping = &sdp->sd_aspace;
 179
 180         WARN_ON_ONCE(!(flags & DIO_METADATA));
 181         gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
 182         truncate_inode_pages_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 183
 184         if (gl->gl_object) {
 185                 struct gfs2_rgrpd *rgd = (struct gfs2_rgrpd *)gl->gl_object;
 186                 rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
 187         }
 188 }
 189
 190 /**
 191  * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
 192  * @gl: the glock protecting the inode
 193  *
 194  */
 195
 196 static void inode_go_sync(struct gfs2_glock *gl)
 197 {
 198         struct gfs2_inode *ip = gl->gl_object;
 199         struct address_space *metamapping = gfs2_glock2aspace(gl);
 200         int error;
 201
 202         if (ip && !S_ISREG(ip->i_inode.i_mode))
 203                 ip = NULL;
 204         if (ip) {
 205                 if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
 206                         unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
 207                 inode_dio_wait(&ip->i_inode);
 208         }
 209         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 210                 return;
 211
 212         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 213
 214         gfs2_log_flush(gl->gl_sbd, gl, NORMAL_FLUSH);
 215         filemap_fdatawrite(metamapping);
 216         if (ip) {
 217                 struct address_space *mapping = ip->i_inode.i_mapping;
 218                 filemap_fdatawrite(mapping);
 219                 error = filemap_fdatawait(mapping);
 220                 mapping_set_error(mapping, error);
 221         }
 222         error = filemap_fdatawait(metamapping);
 223         mapping_set_error(metamapping, error);
 224         gfs2_ail_empty_gl(gl);
 225         /*
 226          * Writeback of the data mapping may cause the dirty flag to be set
 227          * so we have to clear it again here.
 228          */
 229         smp_mb__before_atomic();
 230         clear_bit(GLF_DIRTY, &gl->gl_flags);
 231 }
 232
 233 /**
 234  * inode_go_inval - prepare a inode glock to be released
 235  * @gl: the glock
 236  * @flags:
 237  *
 238  * Normally we invalidate everything, but if we are moving into
 239  * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
 240  * can keep hold of the metadata, since it won't have changed.
 241  *
 242  */
 243
 244 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 245 {
 246         struct gfs2_inode *ip = gl->gl_object;
 247
 248         gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
 249
 250         if (flags & DIO_METADATA) {
 251                 struct address_space *mapping = gfs2_glock2aspace(gl);
 252                 truncate_inode_pages(mapping, 0);
 253                 if (ip) {
 254                         set_bit(GIF_INVALID, &ip->i_flags);
 255                         forget_all_cached_acls(&ip->i_inode);
 256                         gfs2_dir_hash_inval(ip);
 257                 }
 258         }
 259
 260         if (ip == GFS2_I(gl->gl_sbd->sd_rindex)) {
 261                 gfs2_log_flush(gl->gl_sbd, NULL, NORMAL_FLUSH);
 262                 gl->gl_sbd->sd_rindex_uptodate = 0;
 263         }
 264         if (ip && S_ISREG(ip->i_inode.i_mode))
 265                 truncate_inode_pages(ip->i_inode.i_mapping, 0);
 266 }
 267
 268 /**
 269  * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
 270  * @gl: the glock
 271  *
 272  * Returns: 1 if it's ok
 273  */
 274
 275 static int inode_go_demote_ok(const struct gfs2_glock *gl)
 276 {
 277         struct gfs2_sbd *sdp = gl->gl_sbd;
 278         struct gfs2_holder *gh;
 279
 280         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
 281                 return 0;
 282
 283         if (!list_empty(&gl->gl_holders)) {
 284                 gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
 285                 if (gh->gh_list.next != &gl->gl_holders)
 286                         return 0;
 287         }
 288
 289         return 1;
 290 }
 291
 292 /**
 293  * gfs2_set_nlink - Set the inode's link count based on on-disk info
 294  * @inode: The inode in question
 295  * @nlink: The link count
 296  *
 297  * If the link count has hit zero, it must never be raised, whatever the
 298  * on-disk inode might say. When new struct inodes are created the link
 299  * count is set to 1, so that we can safely use this test even when reading
 300  * in on disk information for the first time.
 301  */
 302
 303 static void gfs2_set_nlink(struct inode *inode, u32 nlink)
 304 {
 305         /*
 306          * We will need to review setting the nlink count here in the
 307          * light of the forthcoming ro bind mount work. This is a reminder
 308          * to do that.
 309          */
 310         if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
 311                 if (nlink == 0)
 312                         clear_nlink(inode);
 313                 else
 314                         set_nlink(inode, nlink);
 315         }
 316 }
 317
 318 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 319 {
 320         const struct gfs2_dinode *str = buf;
 321         struct timespec atime;
 322         u16 height, depth;
 323
 324         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
 325                 goto corrupt;
 326         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
 327         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
 328         ip->i_inode.i_rdev = 0;
 329         switch (ip->i_inode.i_mode & S_IFMT) {
 330         case S_IFBLK:
 331         case S_IFCHR:
 332                 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
 333                                            be32_to_cpu(str->di_minor));
 334                 break;
 335         };
 336
 337         i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid));
 338         i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid));
 339         gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
 340         i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
 341         gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
 342         atime.tv_sec = be64_to_cpu(str->di_atime);
 343         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
 344         if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
 345                 ip->i_inode.i_atime = atime;
 346         ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
 347         ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
 348         ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
 349         ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
 350
 351         ip->i_goal = be64_to_cpu(str->di_goal_meta);
 352         ip->i_generation = be64_to_cpu(str->di_generation);
 353
 354         ip->i_diskflags = be32_to_cpu(str->di_flags);
 355         ip->i_eattr = be64_to_cpu(str->di_eattr);
 356         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
 357         gfs2_set_inode_flags(&ip->i_inode);
 358         height = be16_to_cpu(str->di_height);
 359         if (unlikely(height > GFS2_MAX_META_HEIGHT))
 360                 goto corrupt;
 361         ip->i_height = (u8)height;
 362
 363         depth = be16_to_cpu(str->di_depth);
 364         if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
 365                 goto corrupt;
 366         ip->i_depth = (u8)depth;
 367         ip->i_entries = be32_to_cpu(str->di_entries);
 368
 369         if (S_ISREG(ip->i_inode.i_mode))
 370                 gfs2_set_aops(&ip->i_inode);
 371
 372         return 0;
 373 corrupt:
 374         gfs2_consist_inode(ip);
 375         return -EIO;
 376 }
 377
 378 /**
 379  * gfs2_inode_refresh - Refresh the incore copy of the dinode
 380  * @ip: The GFS2 inode
 381  *
 382  * Returns: errno
 383  */
 384
 385 int gfs2_inode_refresh(struct gfs2_inode *ip)
 386 {
 387         struct buffer_head *dibh;
 388         int error;
 389
 390         error = gfs2_meta_inode_buffer(ip, &dibh);
 391         if (error)
 392                 return error;
 393
 394         error = gfs2_dinode_in(ip, dibh->b_data);
 395         brelse(dibh);
 396         clear_bit(GIF_INVALID, &ip->i_flags);
 397
 398         return error;
 399 }
 400
 401 /**
 402  * inode_go_lock - operation done after an inode lock is locked by a process
 403  * @gl: the glock
 404  * @flags:
 405  *
 406  * Returns: errno
 407  */
 408
 409 static int inode_go_lock(struct gfs2_holder *gh)
 410 {
 411         struct gfs2_glock *gl = gh->gh_gl;
 412         struct gfs2_sbd *sdp = gl->gl_sbd;
 413         struct gfs2_inode *ip = gl->gl_object;
 414         int error = 0;
 415
 416         if (!ip || (gh->gh_flags & GL_SKIP))
 417                 return 0;
 418
 419         if (test_bit(GIF_INVALID, &ip->i_flags)) {
 420                 error = gfs2_inode_refresh(ip);
 421                 if (error)
 422                         return error;
 423         }
 424
 425         if (gh->gh_state != LM_ST_DEFERRED)
 426                 inode_dio_wait(&ip->i_inode);
 427
 428         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
 429             (gl->gl_state == LM_ST_EXCLUSIVE) &&
 430             (gh->gh_state == LM_ST_EXCLUSIVE)) {
 431                 spin_lock(&sdp->sd_trunc_lock);
 432                 if (list_empty(&ip->i_trunc_list))
 433                         list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
 434                 spin_unlock(&sdp->sd_trunc_lock);
 435                 wake_up(&sdp->sd_quota_wait);
 436                 return 1;
 437         }
 438
 439         return error;
 440 }
 441
 442 /**
 443  * inode_go_dump - print information about an inode
 444  * @seq: The iterator
 445  * @ip: the inode
 446  *
 447  */
 448
 449 static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
 450 {
 451         const struct gfs2_inode *ip = gl->gl_object;
 452         if (ip == NULL)
 453                 return;
 454         gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
 455                   (unsigned long long)ip->i_no_formal_ino,
 456                   (unsigned long long)ip->i_no_addr,
 457                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
 458                   (unsigned int)ip->i_diskflags,
 459                   (unsigned long long)i_size_read(&ip->i_inode));
 460 }
 461
 462 /**
 463  * freeze_go_sync - promote/demote the freeze glock
 464  * @gl: the glock
 465  * @state: the requested state
 466  * @flags:
 467  *
 468  */
 469
 470 static void freeze_go_sync(struct gfs2_glock *gl)
 471 {
 472         struct gfs2_sbd *sdp = gl->gl_sbd;
 473         DEFINE_WAIT(wait);
 474
 475         if (gl->gl_state == LM_ST_SHARED &&
 476             test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 477                 atomic_set(&sdp->sd_log_freeze, 1);
 478                 wake_up(&sdp->sd_logd_waitq);
 479                 do {
 480                         prepare_to_wait(&sdp->sd_log_frozen_wait, &wait,
 481                                         TASK_UNINTERRUPTIBLE);
 482                         if (atomic_read(&sdp->sd_log_freeze))
 483                                 io_schedule();
 484                 } while(atomic_read(&sdp->sd_log_freeze));
 485                 finish_wait(&sdp->sd_log_frozen_wait, &wait);
 486         }
 487 }
 488
 489 /**
 490  * freeze_go_xmote_bh - After promoting/demoting the freeze glock
 491  * @gl: the glock
 492  *
 493  */
 494
 495 static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
 496 {
 497         struct gfs2_sbd *sdp = gl->gl_sbd;
 498         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 499         struct gfs2_glock *j_gl = ip->i_gl;
 500         struct gfs2_log_header_host head;
 501         int error;
 502
 503         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 504                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 505
 506                 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
 507                 if (error)
 508                         gfs2_consist(sdp);
 509                 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
 510                         gfs2_consist(sdp);
 511
 512                 /*  Initialize some head of the log stuff  */
 513                 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
 514                         sdp->sd_log_sequence = head.lh_sequence + 1;
 515                         gfs2_log_pointers_init(sdp, head.lh_blkno);
 516                 }
 517         }
 518         return 0;
 519 }
 520
 521 /**
 522  * trans_go_demote_ok
 523  * @gl: the glock
 524  *
 525  * Always returns 0
 526  */
 527
 528 static int freeze_go_demote_ok(const struct gfs2_glock *gl)
 529 {
 530         return 0;
 531 }
 532
 533 /**
 534  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
 535  * @gl: the glock
 536  *
 537  * gl_spin lock is held while calling this
 538  */
 539 static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
 540 {
 541         struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object;
 542         struct gfs2_sbd *sdp = gl->gl_sbd;
 543
 544         if (!remote || (sdp->sd_vfs->s_flags & MS_RDONLY))
 545                 return;
 546
 547         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
 548             gl->gl_state == LM_ST_SHARED && ip) {
 549                 gl->gl_lockref.count++;
 550                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
 551                         gl->gl_lockref.count--;
 552         }
 553 }
 554
 555 const struct gfs2_glock_operations gfs2_meta_glops = {
 556         .go_type = LM_TYPE_META,
 557 };
 558
 559 const struct gfs2_glock_operations gfs2_inode_glops = {
 560         .go_sync = inode_go_sync,
 561         .go_inval = inode_go_inval,
 562         .go_demote_ok = inode_go_demote_ok,
 563         .go_lock = inode_go_lock,
 564         .go_dump = inode_go_dump,
 565         .go_type = LM_TYPE_INODE,
 566         .go_flags = GLOF_ASPACE,
 567 };
 568
 569 const struct gfs2_glock_operations gfs2_rgrp_glops = {
 570         .go_sync = rgrp_go_sync,
 571         .go_inval = rgrp_go_inval,
 572         .go_lock = gfs2_rgrp_go_lock,
 573         .go_unlock = gfs2_rgrp_go_unlock,
 574         .go_dump = gfs2_rgrp_dump,
 575         .go_type = LM_TYPE_RGRP,
 576         .go_flags = GLOF_LVB,
 577 };
 578
 579 const struct gfs2_glock_operations gfs2_freeze_glops = {
 580         .go_sync = freeze_go_sync,
 581         .go_xmote_bh = freeze_go_xmote_bh,
 582         .go_demote_ok = freeze_go_demote_ok,
 583         .go_type = LM_TYPE_NONDISK,
 584 };
 585
 586 const struct gfs2_glock_operations gfs2_iopen_glops = {
 587         .go_type = LM_TYPE_IOPEN,
 588         .go_callback = iopen_go_callback,
 589 };
 590
 591 const struct gfs2_glock_operations gfs2_flock_glops = {
 592         .go_type = LM_TYPE_FLOCK,
 593 };
 594
 595 const struct gfs2_glock_operations gfs2_nondisk_glops = {
 596         .go_type = LM_TYPE_NONDISK,
 597 };
 598
 599 const struct gfs2_glock_operations gfs2_quota_glops = {
 600         .go_type = LM_TYPE_QUOTA,
 601         .go_flags = GLOF_LVB,
 602 };
 603
 604 const struct gfs2_glock_operations gfs2_journal_glops = {
 605         .go_type = LM_TYPE_JOURNAL,
 606 };
 607
 608 const struct gfs2_glock_operations *gfs2_glops_list[] = {
 609         [LM_TYPE_META] = &gfs2_meta_glops,
 610         [LM_TYPE_INODE] = &gfs2_inode_glops,
 611         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
 612         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
 613         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
 614         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
 615         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
 616         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
 617 };
 618