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  *
  46  * None of the buffers should be dirty, locked, or pinned.
  47  */
  48
  49 static void __gfs2_ail_flush(struct gfs2_glock *gl, unsigned long b_state)
  50 {
  51         struct gfs2_sbd *sdp = gl->gl_sbd;
  52         struct list_head *head = &gl->gl_ail_list;
  53         struct gfs2_bufdata *bd;
  54         struct buffer_head *bh;
  55         sector_t blocknr;
  56
  57         spin_lock(&sdp->sd_ail_lock);
  58         while (!list_empty(head)) {
  59                 bd = list_entry(head->next, struct gfs2_bufdata,
  60                                 bd_ail_gl_list);
  61                 bh = bd->bd_bh;
  62                 blocknr = bh->b_blocknr;
  63                 if (bh->b_state & b_state)
  64                         gfs2_ail_error(gl, bh);
  65                 bh->b_private = NULL;
  66                 gfs2_remove_from_ail(bd); /* drops ref on bh */
  67                 spin_unlock(&sdp->sd_ail_lock);
  68
  69                 bd->bd_bh = NULL;
  70                 bd->bd_blkno = blocknr;
  71
  72                 gfs2_log_lock(sdp);
  73                 gfs2_trans_add_revoke(sdp, bd);
  74                 gfs2_log_unlock(sdp);
  75
  76                 spin_lock(&sdp->sd_ail_lock);
  77         }
  78         gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
  79         spin_unlock(&sdp->sd_ail_lock);
  80 }
  81
  82
  83 static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
  84 {
  85         struct gfs2_sbd *sdp = gl->gl_sbd;
  86         struct gfs2_trans tr;
  87
  88         memset(&tr, 0, sizeof(tr));
  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.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
  96         tr.tr_ip = (unsigned long)__builtin_return_address(0);
  97         INIT_LIST_HEAD(&tr.tr_list_buf);
  98         gfs2_log_reserve(sdp, tr.tr_reserved);
  99         BUG_ON(current->journal_info);
 100         current->journal_info = &tr;
 101
 102         __gfs2_ail_flush(gl, (1ul << BH_Dirty)|(1ul << BH_Pinned)|(1ul << BH_Lock));
 103
 104         gfs2_trans_end(sdp);
 105         gfs2_log_flush(sdp, NULL);
 106 }
 107
 108 void gfs2_ail_flush(struct gfs2_glock *gl)
 109 {
 110         struct gfs2_sbd *sdp = gl->gl_sbd;
 111         unsigned int revokes = atomic_read(&gl->gl_ail_count);
 112         int ret;
 113
 114         if (!revokes)
 115                 return;
 116
 117         ret = gfs2_trans_begin(sdp, 0, revokes);
 118         if (ret)
 119                 return;
 120         __gfs2_ail_flush(gl, (1ul << BH_Dirty)|(1ul << BH_Pinned));
 121         gfs2_trans_end(sdp);
 122         gfs2_log_flush(sdp, NULL);
 123 }
 124
 125 /**
 126  * rgrp_go_sync - sync out the metadata for this glock
 127  * @gl: the glock
 128  *
 129  * Called when demoting or unlocking an EX glock.  We must flush
 130  * to disk all dirty buffers/pages relating to this glock, and must not
 131  * not return to caller to demote/unlock the glock until I/O is complete.
 132  */
 133
 134 static void rgrp_go_sync(struct gfs2_glock *gl)
 135 {
 136         struct address_space *metamapping = gfs2_glock2aspace(gl);
 137         int error;
 138
 139         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 140                 return;
 141         BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);
 142
 143         gfs2_log_flush(gl->gl_sbd, gl);
 144         filemap_fdatawrite(metamapping);
 145         error = filemap_fdatawait(metamapping);
 146         mapping_set_error(metamapping, error);
 147         gfs2_ail_empty_gl(gl);
 148 }
 149
 150 /**
 151  * rgrp_go_inval - invalidate the metadata for this glock
 152  * @gl: the glock
 153  * @flags:
 154  *
 155  * We never used LM_ST_DEFERRED with resource groups, so that we
 156  * should always see the metadata flag set here.
 157  *
 158  */
 159
 160 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 161 {
 162         struct address_space *mapping = gfs2_glock2aspace(gl);
 163
 164         BUG_ON(!(flags & DIO_METADATA));
 165         gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
 166         truncate_inode_pages(mapping, 0);
 167
 168         if (gl->gl_object) {
 169                 struct gfs2_rgrpd *rgd = (struct gfs2_rgrpd *)gl->gl_object;
 170                 rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
 171         }
 172 }
 173
 174 /**
 175  * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
 176  * @gl: the glock protecting the inode
 177  *
 178  */
 179
 180 static void inode_go_sync(struct gfs2_glock *gl)
 181 {
 182         struct gfs2_inode *ip = gl->gl_object;
 183         struct address_space *metamapping = gfs2_glock2aspace(gl);
 184         int error;
 185
 186         if (ip && !S_ISREG(ip->i_inode.i_mode))
 187                 ip = NULL;
 188         if (ip && test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
 189                 unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
 190         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 191                 return;
 192
 193         BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);
 194
 195         gfs2_log_flush(gl->gl_sbd, gl);
 196         filemap_fdatawrite(metamapping);
 197         if (ip) {
 198                 struct address_space *mapping = ip->i_inode.i_mapping;
 199                 filemap_fdatawrite(mapping);
 200                 error = filemap_fdatawait(mapping);
 201                 mapping_set_error(mapping, error);
 202         }
 203         error = filemap_fdatawait(metamapping);
 204         mapping_set_error(metamapping, error);
 205         gfs2_ail_empty_gl(gl);
 206         /*
 207          * Writeback of the data mapping may cause the dirty flag to be set
 208          * so we have to clear it again here.
 209          */
 210         smp_mb__before_clear_bit();
 211         clear_bit(GLF_DIRTY, &gl->gl_flags);
 212 }
 213
 214 /**
 215  * inode_go_inval - prepare a inode glock to be released
 216  * @gl: the glock
 217  * @flags:
 218  *
 219  * Normally we invlidate everything, but if we are moving into
 220  * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
 221  * can keep hold of the metadata, since it won't have changed.
 222  *
 223  */
 224
 225 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 226 {
 227         struct gfs2_inode *ip = gl->gl_object;
 228
 229         gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
 230
 231         if (flags & DIO_METADATA) {
 232                 struct address_space *mapping = gfs2_glock2aspace(gl);
 233                 truncate_inode_pages(mapping, 0);
 234                 if (ip) {
 235                         set_bit(GIF_INVALID, &ip->i_flags);
 236                         forget_all_cached_acls(&ip->i_inode);
 237                         gfs2_dir_hash_inval(ip);
 238                 }
 239         }
 240
 241         if (ip == GFS2_I(gl->gl_sbd->sd_rindex)) {
 242                 gfs2_log_flush(gl->gl_sbd, NULL);
 243                 gl->gl_sbd->sd_rindex_uptodate = 0;
 244         }
 245         if (ip && S_ISREG(ip->i_inode.i_mode))
 246                 truncate_inode_pages(ip->i_inode.i_mapping, 0);
 247 }
 248
 249 /**
 250  * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
 251  * @gl: the glock
 252  *
 253  * Returns: 1 if it's ok
 254  */
 255
 256 static int inode_go_demote_ok(const struct gfs2_glock *gl)
 257 {
 258         struct gfs2_sbd *sdp = gl->gl_sbd;
 259         struct gfs2_holder *gh;
 260
 261         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
 262                 return 0;
 263
 264         if (!list_empty(&gl->gl_holders)) {
 265                 gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
 266                 if (gh->gh_list.next != &gl->gl_holders)
 267                         return 0;
 268         }
 269
 270         return 1;
 271 }
 272
 273 /**
 274  * gfs2_set_nlink - Set the inode's link count based on on-disk info
 275  * @inode: The inode in question
 276  * @nlink: The link count
 277  *
 278  * If the link count has hit zero, it must never be raised, whatever the
 279  * on-disk inode might say. When new struct inodes are created the link
 280  * count is set to 1, so that we can safely use this test even when reading
 281  * in on disk information for the first time.
 282  */
 283
 284 static void gfs2_set_nlink(struct inode *inode, u32 nlink)
 285 {
 286         /*
 287          * We will need to review setting the nlink count here in the
 288          * light of the forthcoming ro bind mount work. This is a reminder
 289          * to do that.
 290          */
 291         if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
 292                 if (nlink == 0)
 293                         clear_nlink(inode);
 294                 else
 295                         inode->i_nlink = nlink;
 296         }
 297 }
 298
 299 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 300 {
 301         const struct gfs2_dinode *str = buf;
 302         struct timespec atime;
 303         u16 height, depth;
 304
 305         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
 306                 goto corrupt;
 307         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
 308         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
 309         ip->i_inode.i_rdev = 0;
 310         switch (ip->i_inode.i_mode & S_IFMT) {
 311         case S_IFBLK:
 312         case S_IFCHR:
 313                 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
 314                                            be32_to_cpu(str->di_minor));
 315                 break;
 316         };
 317
 318         ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
 319         ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
 320         gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
 321         i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
 322         gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
 323         atime.tv_sec = be64_to_cpu(str->di_atime);
 324         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
 325         if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
 326                 ip->i_inode.i_atime = atime;
 327         ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
 328         ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
 329         ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
 330         ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
 331
 332         ip->i_goal = be64_to_cpu(str->di_goal_meta);
 333         ip->i_generation = be64_to_cpu(str->di_generation);
 334
 335         ip->i_diskflags = be32_to_cpu(str->di_flags);
 336         ip->i_eattr = be64_to_cpu(str->di_eattr);
 337         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
 338         gfs2_set_inode_flags(&ip->i_inode);
 339         height = be16_to_cpu(str->di_height);
 340         if (unlikely(height > GFS2_MAX_META_HEIGHT))
 341                 goto corrupt;
 342         ip->i_height = (u8)height;
 343
 344         depth = be16_to_cpu(str->di_depth);
 345         if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
 346                 goto corrupt;
 347         ip->i_depth = (u8)depth;
 348         ip->i_entries = be32_to_cpu(str->di_entries);
 349
 350         if (S_ISREG(ip->i_inode.i_mode))
 351                 gfs2_set_aops(&ip->i_inode);
 352
 353         return 0;
 354 corrupt:
 355         gfs2_consist_inode(ip);
 356         return -EIO;
 357 }
 358
 359 /**
 360  * gfs2_inode_refresh - Refresh the incore copy of the dinode
 361  * @ip: The GFS2 inode
 362  *
 363  * Returns: errno
 364  */
 365
 366 int gfs2_inode_refresh(struct gfs2_inode *ip)
 367 {
 368         struct buffer_head *dibh;
 369         int error;
 370
 371         error = gfs2_meta_inode_buffer(ip, &dibh);
 372         if (error)
 373                 return error;
 374
 375         if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
 376                 brelse(dibh);
 377                 return -EIO;
 378         }
 379
 380         error = gfs2_dinode_in(ip, dibh->b_data);
 381         brelse(dibh);
 382         clear_bit(GIF_INVALID, &ip->i_flags);
 383
 384         return error;
 385 }
 386
 387 /**
 388  * inode_go_lock - operation done after an inode lock is locked by a process
 389  * @gl: the glock
 390  * @flags:
 391  *
 392  * Returns: errno
 393  */
 394
 395 static int inode_go_lock(struct gfs2_holder *gh)
 396 {
 397         struct gfs2_glock *gl = gh->gh_gl;
 398         struct gfs2_sbd *sdp = gl->gl_sbd;
 399         struct gfs2_inode *ip = gl->gl_object;
 400         int error = 0;
 401
 402         if (!ip || (gh->gh_flags & GL_SKIP))
 403                 return 0;
 404
 405         if (test_bit(GIF_INVALID, &ip->i_flags)) {
 406                 error = gfs2_inode_refresh(ip);
 407                 if (error)
 408                         return error;
 409         }
 410
 411         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
 412             (gl->gl_state == LM_ST_EXCLUSIVE) &&
 413             (gh->gh_state == LM_ST_EXCLUSIVE)) {
 414                 spin_lock(&sdp->sd_trunc_lock);
 415                 if (list_empty(&ip->i_trunc_list))
 416                         list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
 417                 spin_unlock(&sdp->sd_trunc_lock);
 418                 wake_up(&sdp->sd_quota_wait);
 419                 return 1;
 420         }
 421
 422         return error;
 423 }
 424
 425 /**
 426  * inode_go_dump - print information about an inode
 427  * @seq: The iterator
 428  * @ip: the inode
 429  *
 430  * Returns: 0 on success, -ENOBUFS when we run out of space
 431  */
 432
 433 static int inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
 434 {
 435         const struct gfs2_inode *ip = gl->gl_object;
 436         if (ip == NULL)
 437                 return 0;
 438         gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
 439                   (unsigned long long)ip->i_no_formal_ino,
 440                   (unsigned long long)ip->i_no_addr,
 441                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
 442                   (unsigned int)ip->i_diskflags,
 443                   (unsigned long long)i_size_read(&ip->i_inode));
 444         return 0;
 445 }
 446
 447 /**
 448  * rgrp_go_lock - operation done after an rgrp lock is locked by
 449  *    a first holder on this node.
 450  * @gl: the glock
 451  * @flags:
 452  *
 453  * Returns: errno
 454  */
 455
 456 static int rgrp_go_lock(struct gfs2_holder *gh)
 457 {
 458         return gfs2_rgrp_bh_get(gh->gh_gl->gl_object);
 459 }
 460
 461 /**
 462  * rgrp_go_unlock - operation done before an rgrp lock is unlocked by
 463  *    a last holder on this node.
 464  * @gl: the glock
 465  * @flags:
 466  *
 467  */
 468
 469 static void rgrp_go_unlock(struct gfs2_holder *gh)
 470 {
 471         gfs2_rgrp_bh_put(gh->gh_gl->gl_object);
 472 }
 473
 474 /**
 475  * trans_go_sync - promote/demote the transaction glock
 476  * @gl: the glock
 477  * @state: the requested state
 478  * @flags:
 479  *
 480  */
 481
 482 static void trans_go_sync(struct gfs2_glock *gl)
 483 {
 484         struct gfs2_sbd *sdp = gl->gl_sbd;
 485
 486         if (gl->gl_state != LM_ST_UNLOCKED &&
 487             test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 488                 gfs2_meta_syncfs(sdp);
 489                 gfs2_log_shutdown(sdp);
 490         }
 491 }
 492
 493 /**
 494  * trans_go_xmote_bh - After promoting/demoting the transaction glock
 495  * @gl: the glock
 496  *
 497  */
 498
 499 static int trans_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
 500 {
 501         struct gfs2_sbd *sdp = gl->gl_sbd;
 502         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 503         struct gfs2_glock *j_gl = ip->i_gl;
 504         struct gfs2_log_header_host head;
 505         int error;
 506
 507         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 508                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 509
 510                 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
 511                 if (error)
 512                         gfs2_consist(sdp);
 513                 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
 514                         gfs2_consist(sdp);
 515
 516                 /*  Initialize some head of the log stuff  */
 517                 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
 518                         sdp->sd_log_sequence = head.lh_sequence + 1;
 519                         gfs2_log_pointers_init(sdp, head.lh_blkno);
 520                 }
 521         }
 522         return 0;
 523 }
 524
 525 /**
 526  * trans_go_demote_ok
 527  * @gl: the glock
 528  *
 529  * Always returns 0
 530  */
 531
 532 static int trans_go_demote_ok(const struct gfs2_glock *gl)
 533 {
 534         return 0;
 535 }
 536
 537 /**
 538  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
 539  * @gl: the glock
 540  *
 541  * gl_spin lock is held while calling this
 542  */
 543 static void iopen_go_callback(struct gfs2_glock *gl)
 544 {
 545         struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object;
 546         struct gfs2_sbd *sdp = gl->gl_sbd;
 547
 548         if (sdp->sd_vfs->s_flags & MS_RDONLY)
 549                 return;
 550
 551         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
 552             gl->gl_state == LM_ST_SHARED && ip) {
 553                 gfs2_glock_hold(gl);
 554                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
 555                         gfs2_glock_put_nolock(gl);
 556         }
 557 }
 558
 559 const struct gfs2_glock_operations gfs2_meta_glops = {
 560         .go_type = LM_TYPE_META,
 561 };
 562
 563 const struct gfs2_glock_operations gfs2_inode_glops = {
 564         .go_xmote_th = inode_go_sync,
 565         .go_inval = inode_go_inval,
 566         .go_demote_ok = inode_go_demote_ok,
 567         .go_lock = inode_go_lock,
 568         .go_dump = inode_go_dump,
 569         .go_type = LM_TYPE_INODE,
 570         .go_flags = GLOF_ASPACE,
 571 };
 572
 573 const struct gfs2_glock_operations gfs2_rgrp_glops = {
 574         .go_xmote_th = rgrp_go_sync,
 575         .go_inval = rgrp_go_inval,
 576         .go_lock = rgrp_go_lock,
 577         .go_unlock = rgrp_go_unlock,
 578         .go_dump = gfs2_rgrp_dump,
 579         .go_type = LM_TYPE_RGRP,
 580         .go_flags = GLOF_ASPACE,
 581 };
 582
 583 const struct gfs2_glock_operations gfs2_trans_glops = {
 584         .go_xmote_th = trans_go_sync,
 585         .go_xmote_bh = trans_go_xmote_bh,
 586         .go_demote_ok = trans_go_demote_ok,
 587         .go_type = LM_TYPE_NONDISK,
 588 };
 589
 590 const struct gfs2_glock_operations gfs2_iopen_glops = {
 591         .go_type = LM_TYPE_IOPEN,
 592         .go_callback = iopen_go_callback,
 593 };
 594
 595 const struct gfs2_glock_operations gfs2_flock_glops = {
 596         .go_type = LM_TYPE_FLOCK,
 597 };
 598
 599 const struct gfs2_glock_operations gfs2_nondisk_glops = {
 600         .go_type = LM_TYPE_NONDISK,
 601 };
 602
 603 const struct gfs2_glock_operations gfs2_quota_glops = {
 604         .go_type = LM_TYPE_QUOTA,
 605 };
 606
 607 const struct gfs2_glock_operations gfs2_journal_glops = {
 608         .go_type = LM_TYPE_JOURNAL,
 609 };
 610
 611 const struct gfs2_glock_operations *gfs2_glops_list[] = {
 612         [LM_TYPE_META] = &gfs2_meta_glops,
 613         [LM_TYPE_INODE] = &gfs2_inode_glops,
 614         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
 615         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
 616         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
 617         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
 618         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
 619         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
 620 };
 621