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         spin_lock(&gl->gl_spin);
 148         rgd = gl->gl_object;
 149         if (rgd)
 150                 gfs2_rgrp_brelse(rgd);
 151         spin_unlock(&gl->gl_spin);
 152
 153         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 154                 return;
 155         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 156
 157         gfs2_log_flush(sdp, gl, NORMAL_FLUSH);
 158         filemap_fdatawrite_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 159         error = filemap_fdatawait_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 160         mapping_set_error(mapping, error);
 161         gfs2_ail_empty_gl(gl);
 162
 163         spin_lock(&gl->gl_spin);
 164         rgd = gl->gl_object;
 165         if (rgd)
 166                 gfs2_free_clones(rgd);
 167         spin_unlock(&gl->gl_spin);
 168 }
 169
 170 /**
 171  * rgrp_go_inval - invalidate the metadata for this glock
 172  * @gl: the glock
 173  * @flags:
 174  *
 175  * We never used LM_ST_DEFERRED with resource groups, so that we
 176  * should always see the metadata flag set here.
 177  *
 178  */
 179
 180 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 181 {
 182         struct gfs2_sbd *sdp = gl->gl_sbd;
 183         struct address_space *mapping = &sdp->sd_aspace;
 184         struct gfs2_rgrpd *rgd = gl->gl_object;
 185
 186         if (rgd)
 187                 gfs2_rgrp_brelse(rgd);
 188
 189         WARN_ON_ONCE(!(flags & DIO_METADATA));
 190         gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
 191         truncate_inode_pages_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 192
 193         if (rgd)
 194                 rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
 195 }
 196
 197 /**
 198  * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
 199  * @gl: the glock protecting the inode
 200  *
 201  */
 202
 203 static void inode_go_sync(struct gfs2_glock *gl)
 204 {
 205         struct gfs2_inode *ip = gl->gl_object;
 206         struct address_space *metamapping = gfs2_glock2aspace(gl);
 207         int error;
 208
 209         if (ip && !S_ISREG(ip->i_inode.i_mode))
 210                 ip = NULL;
 211         if (ip) {
 212                 if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
 213                         unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
 214                 inode_dio_wait(&ip->i_inode);
 215         }
 216         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 217                 return;
 218
 219         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 220
 221         gfs2_log_flush(gl->gl_sbd, gl, NORMAL_FLUSH);
 222         filemap_fdatawrite(metamapping);
 223         if (ip) {
 224                 struct address_space *mapping = ip->i_inode.i_mapping;
 225                 filemap_fdatawrite(mapping);
 226                 error = filemap_fdatawait(mapping);
 227                 mapping_set_error(mapping, error);
 228         }
 229         error = filemap_fdatawait(metamapping);
 230         mapping_set_error(metamapping, error);
 231         gfs2_ail_empty_gl(gl);
 232         /*
 233          * Writeback of the data mapping may cause the dirty flag to be set
 234          * so we have to clear it again here.
 235          */
 236         smp_mb__before_atomic();
 237         clear_bit(GLF_DIRTY, &gl->gl_flags);
 238 }
 239
 240 /**
 241  * inode_go_inval - prepare a inode glock to be released
 242  * @gl: the glock
 243  * @flags:
 244  *
 245  * Normally we invalidate everything, but if we are moving into
 246  * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
 247  * can keep hold of the metadata, since it won't have changed.
 248  *
 249  */
 250
 251 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 252 {
 253         struct gfs2_inode *ip = gl->gl_object;
 254
 255         gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
 256
 257         if (flags & DIO_METADATA) {
 258                 struct address_space *mapping = gfs2_glock2aspace(gl);
 259                 truncate_inode_pages(mapping, 0);
 260                 if (ip) {
 261                         set_bit(GIF_INVALID, &ip->i_flags);
 262                         forget_all_cached_acls(&ip->i_inode);
 263                         gfs2_dir_hash_inval(ip);
 264                 }
 265         }
 266
 267         if (ip == GFS2_I(gl->gl_sbd->sd_rindex)) {
 268                 gfs2_log_flush(gl->gl_sbd, NULL, NORMAL_FLUSH);
 269                 gl->gl_sbd->sd_rindex_uptodate = 0;
 270         }
 271         if (ip && S_ISREG(ip->i_inode.i_mode))
 272                 truncate_inode_pages(ip->i_inode.i_mapping, 0);
 273 }
 274
 275 /**
 276  * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
 277  * @gl: the glock
 278  *
 279  * Returns: 1 if it's ok
 280  */
 281
 282 static int inode_go_demote_ok(const struct gfs2_glock *gl)
 283 {
 284         struct gfs2_sbd *sdp = gl->gl_sbd;
 285         struct gfs2_holder *gh;
 286
 287         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
 288                 return 0;
 289
 290         if (!list_empty(&gl->gl_holders)) {
 291                 gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
 292                 if (gh->gh_list.next != &gl->gl_holders)
 293                         return 0;
 294         }
 295
 296         return 1;
 297 }
 298
 299 /**
 300  * gfs2_set_nlink - Set the inode's link count based on on-disk info
 301  * @inode: The inode in question
 302  * @nlink: The link count
 303  *
 304  * If the link count has hit zero, it must never be raised, whatever the
 305  * on-disk inode might say. When new struct inodes are created the link
 306  * count is set to 1, so that we can safely use this test even when reading
 307  * in on disk information for the first time.
 308  */
 309
 310 static void gfs2_set_nlink(struct inode *inode, u32 nlink)
 311 {
 312         /*
 313          * We will need to review setting the nlink count here in the
 314          * light of the forthcoming ro bind mount work. This is a reminder
 315          * to do that.
 316          */
 317         if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
 318                 if (nlink == 0)
 319                         clear_nlink(inode);
 320                 else
 321                         set_nlink(inode, nlink);
 322         }
 323 }
 324
 325 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 326 {
 327         const struct gfs2_dinode *str = buf;
 328         struct timespec atime;
 329         u16 height, depth;
 330
 331         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
 332                 goto corrupt;
 333         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
 334         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
 335         ip->i_inode.i_rdev = 0;
 336         switch (ip->i_inode.i_mode & S_IFMT) {
 337         case S_IFBLK:
 338         case S_IFCHR:
 339                 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
 340                                            be32_to_cpu(str->di_minor));
 341                 break;
 342         };
 343
 344         i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid));
 345         i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid));
 346         gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
 347         i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
 348         gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
 349         atime.tv_sec = be64_to_cpu(str->di_atime);
 350         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
 351         if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
 352                 ip->i_inode.i_atime = atime;
 353         ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
 354         ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
 355         ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
 356         ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
 357
 358         ip->i_goal = be64_to_cpu(str->di_goal_meta);
 359         ip->i_generation = be64_to_cpu(str->di_generation);
 360
 361         ip->i_diskflags = be32_to_cpu(str->di_flags);
 362         ip->i_eattr = be64_to_cpu(str->di_eattr);
 363         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
 364         gfs2_set_inode_flags(&ip->i_inode);
 365         height = be16_to_cpu(str->di_height);
 366         if (unlikely(height > GFS2_MAX_META_HEIGHT))
 367                 goto corrupt;
 368         ip->i_height = (u8)height;
 369
 370         depth = be16_to_cpu(str->di_depth);
 371         if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
 372                 goto corrupt;
 373         ip->i_depth = (u8)depth;
 374         ip->i_entries = be32_to_cpu(str->di_entries);
 375
 376         if (S_ISREG(ip->i_inode.i_mode))
 377                 gfs2_set_aops(&ip->i_inode);
 378
 379         return 0;
 380 corrupt:
 381         gfs2_consist_inode(ip);
 382         return -EIO;
 383 }
 384
 385 /**
 386  * gfs2_inode_refresh - Refresh the incore copy of the dinode
 387  * @ip: The GFS2 inode
 388  *
 389  * Returns: errno
 390  */
 391
 392 int gfs2_inode_refresh(struct gfs2_inode *ip)
 393 {
 394         struct buffer_head *dibh;
 395         int error;
 396
 397         error = gfs2_meta_inode_buffer(ip, &dibh);
 398         if (error)
 399                 return error;
 400
 401         error = gfs2_dinode_in(ip, dibh->b_data);
 402         brelse(dibh);
 403         clear_bit(GIF_INVALID, &ip->i_flags);
 404
 405         return error;
 406 }
 407
 408 /**
 409  * inode_go_lock - operation done after an inode lock is locked by a process
 410  * @gl: the glock
 411  * @flags:
 412  *
 413  * Returns: errno
 414  */
 415
 416 static int inode_go_lock(struct gfs2_holder *gh)
 417 {
 418         struct gfs2_glock *gl = gh->gh_gl;
 419         struct gfs2_sbd *sdp = gl->gl_sbd;
 420         struct gfs2_inode *ip = gl->gl_object;
 421         int error = 0;
 422
 423         if (!ip || (gh->gh_flags & GL_SKIP))
 424                 return 0;
 425
 426         if (test_bit(GIF_INVALID, &ip->i_flags)) {
 427                 error = gfs2_inode_refresh(ip);
 428                 if (error)
 429                         return error;
 430         }
 431
 432         if (gh->gh_state != LM_ST_DEFERRED)
 433                 inode_dio_wait(&ip->i_inode);
 434
 435         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
 436             (gl->gl_state == LM_ST_EXCLUSIVE) &&
 437             (gh->gh_state == LM_ST_EXCLUSIVE)) {
 438                 spin_lock(&sdp->sd_trunc_lock);
 439                 if (list_empty(&ip->i_trunc_list))
 440                         list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
 441                 spin_unlock(&sdp->sd_trunc_lock);
 442                 wake_up(&sdp->sd_quota_wait);
 443                 return 1;
 444         }
 445
 446         return error;
 447 }
 448
 449 /**
 450  * inode_go_dump - print information about an inode
 451  * @seq: The iterator
 452  * @ip: the inode
 453  *
 454  */
 455
 456 static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
 457 {
 458         const struct gfs2_inode *ip = gl->gl_object;
 459         if (ip == NULL)
 460                 return;
 461         gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
 462                   (unsigned long long)ip->i_no_formal_ino,
 463                   (unsigned long long)ip->i_no_addr,
 464                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
 465                   (unsigned int)ip->i_diskflags,
 466                   (unsigned long long)i_size_read(&ip->i_inode));
 467 }
 468
 469 /**
 470  * freeze_go_sync - promote/demote the freeze glock
 471  * @gl: the glock
 472  * @state: the requested state
 473  * @flags:
 474  *
 475  */
 476
 477 static void freeze_go_sync(struct gfs2_glock *gl)
 478 {
 479         int error = 0;
 480         struct gfs2_sbd *sdp = gl->gl_sbd;
 481
 482         if (gl->gl_state == LM_ST_SHARED &&
 483             test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 484                 atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
 485                 error = freeze_super(sdp->sd_vfs);
 486                 if (error) {
 487                         printk(KERN_INFO "GFS2: couldn't freeze filesystem: %d\n", error);
 488                         gfs2_assert_withdraw(sdp, 0);
 489                 }
 490                 queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work);
 491                 gfs2_log_flush(sdp, NULL, FREEZE_FLUSH);
 492         }
 493 }
 494
 495 /**
 496  * freeze_go_xmote_bh - After promoting/demoting the freeze glock
 497  * @gl: the glock
 498  *
 499  */
 500
 501 static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
 502 {
 503         struct gfs2_sbd *sdp = gl->gl_sbd;
 504         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 505         struct gfs2_glock *j_gl = ip->i_gl;
 506         struct gfs2_log_header_host head;
 507         int error;
 508
 509         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 510                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 511
 512                 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
 513                 if (error)
 514                         gfs2_consist(sdp);
 515                 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
 516                         gfs2_consist(sdp);
 517
 518                 /*  Initialize some head of the log stuff  */
 519                 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
 520                         sdp->sd_log_sequence = head.lh_sequence + 1;
 521                         gfs2_log_pointers_init(sdp, head.lh_blkno);
 522                 }
 523         }
 524         return 0;
 525 }
 526
 527 /**
 528  * trans_go_demote_ok
 529  * @gl: the glock
 530  *
 531  * Always returns 0
 532  */
 533
 534 static int freeze_go_demote_ok(const struct gfs2_glock *gl)
 535 {
 536         return 0;
 537 }
 538
 539 /**
 540  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
 541  * @gl: the glock
 542  *
 543  * gl_spin lock is held while calling this
 544  */
 545 static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
 546 {
 547         struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object;
 548         struct gfs2_sbd *sdp = gl->gl_sbd;
 549
 550         if (!remote || (sdp->sd_vfs->s_flags & MS_RDONLY))
 551                 return;
 552
 553         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
 554             gl->gl_state == LM_ST_SHARED && ip) {
 555                 gl->gl_lockref.count++;
 556                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
 557                         gl->gl_lockref.count--;
 558         }
 559 }
 560
 561 const struct gfs2_glock_operations gfs2_meta_glops = {
 562         .go_type = LM_TYPE_META,
 563 };
 564
 565 const struct gfs2_glock_operations gfs2_inode_glops = {
 566         .go_sync = inode_go_sync,
 567         .go_inval = inode_go_inval,
 568         .go_demote_ok = inode_go_demote_ok,
 569         .go_lock = inode_go_lock,
 570         .go_dump = inode_go_dump,
 571         .go_type = LM_TYPE_INODE,
 572         .go_flags = GLOF_ASPACE | GLOF_LRU,
 573 };
 574
 575 const struct gfs2_glock_operations gfs2_rgrp_glops = {
 576         .go_sync = rgrp_go_sync,
 577         .go_inval = rgrp_go_inval,
 578         .go_lock = gfs2_rgrp_go_lock,
 579         .go_unlock = gfs2_rgrp_go_unlock,
 580         .go_dump = gfs2_rgrp_dump,
 581         .go_type = LM_TYPE_RGRP,
 582         .go_flags = GLOF_LVB,
 583 };
 584
 585 const struct gfs2_glock_operations gfs2_freeze_glops = {
 586         .go_sync = freeze_go_sync,
 587         .go_xmote_bh = freeze_go_xmote_bh,
 588         .go_demote_ok = freeze_go_demote_ok,
 589         .go_type = LM_TYPE_NONDISK,
 590 };
 591
 592 const struct gfs2_glock_operations gfs2_iopen_glops = {
 593         .go_type = LM_TYPE_IOPEN,
 594         .go_callback = iopen_go_callback,
 595         .go_flags = GLOF_LRU,
 596 };
 597
 598 const struct gfs2_glock_operations gfs2_flock_glops = {
 599         .go_type = LM_TYPE_FLOCK,
 600         .go_flags = GLOF_LRU,
 601 };
 602
 603 const struct gfs2_glock_operations gfs2_nondisk_glops = {
 604         .go_type = LM_TYPE_NONDISK,
 605 };
 606
 607 const struct gfs2_glock_operations gfs2_quota_glops = {
 608         .go_type = LM_TYPE_QUOTA,
 609         .go_flags = GLOF_LVB | GLOF_LRU,
 610 };
 611
 612 const struct gfs2_glock_operations gfs2_journal_glops = {
 613         .go_type = LM_TYPE_JOURNAL,
 614 };
 615
 616 const struct gfs2_glock_operations *gfs2_glops_list[] = {
 617         [LM_TYPE_META] = &gfs2_meta_glops,
 618         [LM_TYPE_INODE] = &gfs2_inode_glops,
 619         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
 620         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
 621         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
 622         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
 623         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
 624         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
 625 };
 626