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 #include <linux/security.h>
  17
  18 #include "gfs2.h"
  19 #include "incore.h"
  20 #include "bmap.h"
  21 #include "glock.h"
  22 #include "glops.h"
  23 #include "inode.h"
  24 #include "log.h"
  25 #include "meta_io.h"
  26 #include "recovery.h"
  27 #include "rgrp.h"
  28 #include "util.h"
  29 #include "trans.h"
  30 #include "dir.h"
  31
  32 struct workqueue_struct *gfs2_freeze_wq;
  33
  34 static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
  35 {
  36         fs_err(gl->gl_name.ln_sbd,
  37                "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page "
  38                "state 0x%lx\n",
  39                bh, (unsigned long long)bh->b_blocknr, bh->b_state,
  40                bh->b_page->mapping, bh->b_page->flags);
  41         fs_err(gl->gl_name.ln_sbd, "AIL glock %u:%llu mapping %p\n",
  42                gl->gl_name.ln_type, gl->gl_name.ln_number,
  43                gfs2_glock2aspace(gl));
  44         gfs2_lm_withdraw(gl->gl_name.ln_sbd, "AIL error\n");
  45 }
  46
  47 /**
  48  * __gfs2_ail_flush - remove all buffers for a given lock from the AIL
  49  * @gl: the glock
  50  * @fsync: set when called from fsync (not all buffers will be clean)
  51  *
  52  * None of the buffers should be dirty, locked, or pinned.
  53  */
  54
  55 static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync,
  56                              unsigned int nr_revokes)
  57 {
  58         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
  59         struct list_head *head = &gl->gl_ail_list;
  60         struct gfs2_bufdata *bd, *tmp;
  61         struct buffer_head *bh;
  62         const unsigned long b_state = (1UL << BH_Dirty)|(1UL << BH_Pinned)|(1UL << BH_Lock);
  63
  64         gfs2_log_lock(sdp);
  65         spin_lock(&sdp->sd_ail_lock);
  66         list_for_each_entry_safe_reverse(bd, tmp, head, bd_ail_gl_list) {
  67                 if (nr_revokes == 0)
  68                         break;
  69                 bh = bd->bd_bh;
  70                 if (bh->b_state & b_state) {
  71                         if (fsync)
  72                                 continue;
  73                         gfs2_ail_error(gl, bh);
  74                 }
  75                 gfs2_trans_add_revoke(sdp, bd);
  76                 nr_revokes--;
  77         }
  78         GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count));
  79         spin_unlock(&sdp->sd_ail_lock);
  80         gfs2_log_unlock(sdp);
  81 }
  82
  83
  84 static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
  85 {
  86         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
  87         struct gfs2_trans tr;
  88
  89         memset(&tr, 0, sizeof(tr));
  90         INIT_LIST_HEAD(&tr.tr_buf);
  91         INIT_LIST_HEAD(&tr.tr_databuf);
  92         tr.tr_revokes = atomic_read(&gl->gl_ail_count);
  93
  94         if (!tr.tr_revokes)
  95                 return;
  96
  97         /* A shortened, inline version of gfs2_trans_begin()
  98          * tr->alloced is not set since the transaction structure is
  99          * on the stack */
 100         tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
 101         tr.tr_ip = _RET_IP_;
 102         if (gfs2_log_reserve(sdp, tr.tr_reserved) < 0)
 103                 return;
 104         WARN_ON_ONCE(current->journal_info);
 105         current->journal_info = &tr;
 106
 107         __gfs2_ail_flush(gl, 0, tr.tr_revokes);
 108
 109         gfs2_trans_end(sdp);
 110         gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
 111 }
 112
 113 void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
 114 {
 115         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 116         unsigned int revokes = atomic_read(&gl->gl_ail_count);
 117         unsigned int max_revokes = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
 118         int ret;
 119
 120         if (!revokes)
 121                 return;
 122
 123         while (revokes > max_revokes)
 124                 max_revokes += (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64);
 125
 126         ret = gfs2_trans_begin(sdp, 0, max_revokes);
 127         if (ret)
 128                 return;
 129         __gfs2_ail_flush(gl, fsync, max_revokes);
 130         gfs2_trans_end(sdp);
 131         gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
 132 }
 133
 134 /**
 135  * rgrp_go_sync - sync out the metadata for this glock
 136  * @gl: the glock
 137  *
 138  * Called when demoting or unlocking an EX glock.  We must flush
 139  * to disk all dirty buffers/pages relating to this glock, and must not
 140  * not return to caller to demote/unlock the glock until I/O is complete.
 141  */
 142
 143 static void rgrp_go_sync(struct gfs2_glock *gl)
 144 {
 145         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 146         struct address_space *mapping = &sdp->sd_aspace;
 147         struct gfs2_rgrpd *rgd;
 148         int error;
 149
 150         spin_lock(&gl->gl_lockref.lock);
 151         rgd = gl->gl_object;
 152         if (rgd)
 153                 gfs2_rgrp_brelse(rgd);
 154         spin_unlock(&gl->gl_lockref.lock);
 155
 156         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 157                 return;
 158         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 159
 160         gfs2_log_flush(sdp, gl, NORMAL_FLUSH);
 161         filemap_fdatawrite_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 162         error = filemap_fdatawait_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 163         mapping_set_error(mapping, error);
 164         gfs2_ail_empty_gl(gl);
 165
 166         spin_lock(&gl->gl_lockref.lock);
 167         rgd = gl->gl_object;
 168         if (rgd)
 169                 gfs2_free_clones(rgd);
 170         spin_unlock(&gl->gl_lockref.lock);
 171 }
 172
 173 /**
 174  * rgrp_go_inval - invalidate the metadata for this glock
 175  * @gl: the glock
 176  * @flags:
 177  *
 178  * We never used LM_ST_DEFERRED with resource groups, so that we
 179  * should always see the metadata flag set here.
 180  *
 181  */
 182
 183 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 184 {
 185         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 186         struct address_space *mapping = &sdp->sd_aspace;
 187         struct gfs2_rgrpd *rgd = gl->gl_object;
 188
 189         if (rgd)
 190                 gfs2_rgrp_brelse(rgd);
 191
 192         WARN_ON_ONCE(!(flags & DIO_METADATA));
 193         gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
 194         truncate_inode_pages_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 195
 196         if (rgd)
 197                 rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
 198 }
 199
 200 /**
 201  * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
 202  * @gl: the glock protecting the inode
 203  *
 204  */
 205
 206 static void inode_go_sync(struct gfs2_glock *gl)
 207 {
 208         struct gfs2_inode *ip = gl->gl_object;
 209         struct address_space *metamapping = gfs2_glock2aspace(gl);
 210         int error;
 211
 212         if (ip && !S_ISREG(ip->i_inode.i_mode))
 213                 ip = NULL;
 214         if (ip) {
 215                 if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
 216                         unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
 217                 inode_dio_wait(&ip->i_inode);
 218         }
 219         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 220                 return;
 221
 222         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 223
 224         gfs2_log_flush(gl->gl_name.ln_sbd, gl, NORMAL_FLUSH);
 225         filemap_fdatawrite(metamapping);
 226         if (ip) {
 227                 struct address_space *mapping = ip->i_inode.i_mapping;
 228                 filemap_fdatawrite(mapping);
 229                 error = filemap_fdatawait(mapping);
 230                 mapping_set_error(mapping, error);
 231         }
 232         error = filemap_fdatawait(metamapping);
 233         mapping_set_error(metamapping, error);
 234         gfs2_ail_empty_gl(gl);
 235         /*
 236          * Writeback of the data mapping may cause the dirty flag to be set
 237          * so we have to clear it again here.
 238          */
 239         smp_mb__before_atomic();
 240         clear_bit(GLF_DIRTY, &gl->gl_flags);
 241 }
 242
 243 /**
 244  * inode_go_inval - prepare a inode glock to be released
 245  * @gl: the glock
 246  * @flags:
 247  *
 248  * Normally we invalidate everything, but if we are moving into
 249  * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
 250  * can keep hold of the metadata, since it won't have changed.
 251  *
 252  */
 253
 254 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 255 {
 256         struct gfs2_inode *ip = gl->gl_object;
 257
 258         gfs2_assert_withdraw(gl->gl_name.ln_sbd, !atomic_read(&gl->gl_ail_count));
 259
 260         if (flags & DIO_METADATA) {
 261                 struct address_space *mapping = gfs2_glock2aspace(gl);
 262                 truncate_inode_pages(mapping, 0);
 263                 if (ip) {
 264                         set_bit(GIF_INVALID, &ip->i_flags);
 265                         forget_all_cached_acls(&ip->i_inode);
 266                         security_inode_invalidate_secctx(&ip->i_inode);
 267                         gfs2_dir_hash_inval(ip);
 268                 }
 269         }
 270
 271         if (ip == GFS2_I(gl->gl_name.ln_sbd->sd_rindex)) {
 272                 gfs2_log_flush(gl->gl_name.ln_sbd, NULL, NORMAL_FLUSH);
 273                 gl->gl_name.ln_sbd->sd_rindex_uptodate = 0;
 274         }
 275         if (ip && S_ISREG(ip->i_inode.i_mode))
 276                 truncate_inode_pages(ip->i_inode.i_mapping, 0);
 277 }
 278
 279 /**
 280  * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
 281  * @gl: the glock
 282  *
 283  * Returns: 1 if it's ok
 284  */
 285
 286 static int inode_go_demote_ok(const struct gfs2_glock *gl)
 287 {
 288         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 289
 290         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
 291                 return 0;
 292
 293         return 1;
 294 }
 295
 296 /**
 297  * gfs2_set_nlink - Set the inode's link count based on on-disk info
 298  * @inode: The inode in question
 299  * @nlink: The link count
 300  *
 301  * If the link count has hit zero, it must never be raised, whatever the
 302  * on-disk inode might say. When new struct inodes are created the link
 303  * count is set to 1, so that we can safely use this test even when reading
 304  * in on disk information for the first time.
 305  */
 306
 307 static void gfs2_set_nlink(struct inode *inode, u32 nlink)
 308 {
 309         /*
 310          * We will need to review setting the nlink count here in the
 311          * light of the forthcoming ro bind mount work. This is a reminder
 312          * to do that.
 313          */
 314         if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
 315                 if (nlink == 0)
 316                         clear_nlink(inode);
 317                 else
 318                         set_nlink(inode, nlink);
 319         }
 320 }
 321
 322 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 323 {
 324         const struct gfs2_dinode *str = buf;
 325         struct timespec atime;
 326         u16 height, depth;
 327
 328         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
 329                 goto corrupt;
 330         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
 331         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
 332         ip->i_inode.i_rdev = 0;
 333         switch (ip->i_inode.i_mode & S_IFMT) {
 334         case S_IFBLK:
 335         case S_IFCHR:
 336                 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
 337                                            be32_to_cpu(str->di_minor));
 338                 break;
 339         };
 340
 341         i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid));
 342         i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid));
 343         gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
 344         i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
 345         gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
 346         atime.tv_sec = be64_to_cpu(str->di_atime);
 347         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
 348         if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
 349                 ip->i_inode.i_atime = atime;
 350         ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
 351         ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
 352         ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
 353         ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
 354
 355         ip->i_goal = be64_to_cpu(str->di_goal_meta);
 356         ip->i_generation = be64_to_cpu(str->di_generation);
 357
 358         ip->i_diskflags = be32_to_cpu(str->di_flags);
 359         ip->i_eattr = be64_to_cpu(str->di_eattr);
 360         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
 361         gfs2_set_inode_flags(&ip->i_inode);
 362         height = be16_to_cpu(str->di_height);
 363         if (unlikely(height > GFS2_MAX_META_HEIGHT))
 364                 goto corrupt;
 365         ip->i_height = (u8)height;
 366
 367         depth = be16_to_cpu(str->di_depth);
 368         if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
 369                 goto corrupt;
 370         ip->i_depth = (u8)depth;
 371         ip->i_entries = be32_to_cpu(str->di_entries);
 372
 373         if (S_ISREG(ip->i_inode.i_mode))
 374                 gfs2_set_aops(&ip->i_inode);
 375
 376         return 0;
 377 corrupt:
 378         gfs2_consist_inode(ip);
 379         return -EIO;
 380 }
 381
 382 /**
 383  * gfs2_inode_refresh - Refresh the incore copy of the dinode
 384  * @ip: The GFS2 inode
 385  *
 386  * Returns: errno
 387  */
 388
 389 int gfs2_inode_refresh(struct gfs2_inode *ip)
 390 {
 391         struct buffer_head *dibh;
 392         int error;
 393
 394         error = gfs2_meta_inode_buffer(ip, &dibh);
 395         if (error)
 396                 return error;
 397
 398         error = gfs2_dinode_in(ip, dibh->b_data);
 399         brelse(dibh);
 400         clear_bit(GIF_INVALID, &ip->i_flags);
 401
 402         return error;
 403 }
 404
 405 /**
 406  * inode_go_lock - operation done after an inode lock is locked by a process
 407  * @gl: the glock
 408  * @flags:
 409  *
 410  * Returns: errno
 411  */
 412
 413 static int inode_go_lock(struct gfs2_holder *gh)
 414 {
 415         struct gfs2_glock *gl = gh->gh_gl;
 416         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 417         struct gfs2_inode *ip = gl->gl_object;
 418         int error = 0;
 419
 420         if (!ip || (gh->gh_flags & GL_SKIP))
 421                 return 0;
 422
 423         if (test_bit(GIF_INVALID, &ip->i_flags)) {
 424                 error = gfs2_inode_refresh(ip);
 425                 if (error)
 426                         return error;
 427         }
 428
 429         if (gh->gh_state != LM_ST_DEFERRED)
 430                 inode_dio_wait(&ip->i_inode);
 431
 432         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
 433             (gl->gl_state == LM_ST_EXCLUSIVE) &&
 434             (gh->gh_state == LM_ST_EXCLUSIVE)) {
 435                 spin_lock(&sdp->sd_trunc_lock);
 436                 if (list_empty(&ip->i_trunc_list))
 437                         list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
 438                 spin_unlock(&sdp->sd_trunc_lock);
 439                 wake_up(&sdp->sd_quota_wait);
 440                 return 1;
 441         }
 442
 443         return error;
 444 }
 445
 446 /**
 447  * inode_go_dump - print information about an inode
 448  * @seq: The iterator
 449  * @ip: the inode
 450  *
 451  */
 452
 453 static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
 454 {
 455         const struct gfs2_inode *ip = gl->gl_object;
 456         if (ip == NULL)
 457                 return;
 458         gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
 459                   (unsigned long long)ip->i_no_formal_ino,
 460                   (unsigned long long)ip->i_no_addr,
 461                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
 462                   (unsigned int)ip->i_diskflags,
 463                   (unsigned long long)i_size_read(&ip->i_inode));
 464 }
 465
 466 /**
 467  * freeze_go_sync - promote/demote the freeze glock
 468  * @gl: the glock
 469  * @state: the requested state
 470  * @flags:
 471  *
 472  */
 473
 474 static void freeze_go_sync(struct gfs2_glock *gl)
 475 {
 476         int error = 0;
 477         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 478
 479         if (gl->gl_state == LM_ST_SHARED &&
 480             test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 481                 atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
 482                 error = freeze_super(sdp->sd_vfs);
 483                 if (error) {
 484                         printk(KERN_INFO "GFS2: couldn't freeze filesystem: %d\n", error);
 485                         gfs2_assert_withdraw(sdp, 0);
 486                 }
 487                 queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work);
 488                 gfs2_log_flush(sdp, NULL, FREEZE_FLUSH);
 489         }
 490 }
 491
 492 /**
 493  * freeze_go_xmote_bh - After promoting/demoting the freeze glock
 494  * @gl: the glock
 495  *
 496  */
 497
 498 static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
 499 {
 500         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 501         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 502         struct gfs2_glock *j_gl = ip->i_gl;
 503         struct gfs2_log_header_host head;
 504         int error;
 505
 506         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 507                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 508
 509                 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
 510                 if (error)
 511                         gfs2_consist(sdp);
 512                 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
 513                         gfs2_consist(sdp);
 514
 515                 /*  Initialize some head of the log stuff  */
 516                 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
 517                         sdp->sd_log_sequence = head.lh_sequence + 1;
 518                         gfs2_log_pointers_init(sdp, head.lh_blkno);
 519                 }
 520         }
 521         return 0;
 522 }
 523
 524 /**
 525  * trans_go_demote_ok
 526  * @gl: the glock
 527  *
 528  * Always returns 0
 529  */
 530
 531 static int freeze_go_demote_ok(const struct gfs2_glock *gl)
 532 {
 533         return 0;
 534 }
 535
 536 /**
 537  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
 538  * @gl: the glock
 539  *
 540  * gl_lockref.lock lock is held while calling this
 541  */
 542 static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
 543 {
 544         struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object;
 545         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 546
 547         if (!remote || (sdp->sd_vfs->s_flags & MS_RDONLY))
 548                 return;
 549
 550         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
 551             gl->gl_state == LM_ST_SHARED && ip) {
 552                 gl->gl_lockref.count++;
 553                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
 554                         gl->gl_lockref.count--;
 555         }
 556 }
 557
 558 const struct gfs2_glock_operations gfs2_meta_glops = {
 559         .go_type = LM_TYPE_META,
 560 };
 561
 562 const struct gfs2_glock_operations gfs2_inode_glops = {
 563         .go_sync = inode_go_sync,
 564         .go_inval = inode_go_inval,
 565         .go_demote_ok = inode_go_demote_ok,
 566         .go_lock = inode_go_lock,
 567         .go_dump = inode_go_dump,
 568         .go_type = LM_TYPE_INODE,
 569         .go_flags = GLOF_ASPACE | GLOF_LRU,
 570 };
 571
 572 const struct gfs2_glock_operations gfs2_rgrp_glops = {
 573         .go_sync = rgrp_go_sync,
 574         .go_inval = rgrp_go_inval,
 575         .go_lock = gfs2_rgrp_go_lock,
 576         .go_unlock = gfs2_rgrp_go_unlock,
 577         .go_dump = gfs2_rgrp_dump,
 578         .go_type = LM_TYPE_RGRP,
 579         .go_flags = GLOF_LVB,
 580 };
 581
 582 const struct gfs2_glock_operations gfs2_freeze_glops = {
 583         .go_sync = freeze_go_sync,
 584         .go_xmote_bh = freeze_go_xmote_bh,
 585         .go_demote_ok = freeze_go_demote_ok,
 586         .go_type = LM_TYPE_NONDISK,
 587 };
 588
 589 const struct gfs2_glock_operations gfs2_iopen_glops = {
 590         .go_type = LM_TYPE_IOPEN,
 591         .go_callback = iopen_go_callback,
 592         .go_flags = GLOF_LRU,
 593 };
 594
 595 const struct gfs2_glock_operations gfs2_flock_glops = {
 596         .go_type = LM_TYPE_FLOCK,
 597         .go_flags = GLOF_LRU,
 598 };
 599
 600 const struct gfs2_glock_operations gfs2_nondisk_glops = {
 601         .go_type = LM_TYPE_NONDISK,
 602 };
 603
 604 const struct gfs2_glock_operations gfs2_quota_glops = {
 605         .go_type = LM_TYPE_QUOTA,
 606         .go_flags = GLOF_LVB | GLOF_LRU,
 607 };
 608
 609 const struct gfs2_glock_operations gfs2_journal_glops = {
 610         .go_type = LM_TYPE_JOURNAL,
 611 };
 612
 613 const struct gfs2_glock_operations *gfs2_glops_list[] = {
 614         [LM_TYPE_META] = &gfs2_meta_glops,
 615         [LM_TYPE_INODE] = &gfs2_inode_glops,
 616         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
 617         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
 618         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
 619         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
 620         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
 621         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
 622 };
 623