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         INIT_LIST_HEAD(&tr.tr_ail1_list);
  93         INIT_LIST_HEAD(&tr.tr_ail2_list);
  94         tr.tr_revokes = atomic_read(&gl->gl_ail_count);
  95
  96         if (!tr.tr_revokes)
  97                 return;
  98
  99         /* A shortened, inline version of gfs2_trans_begin()
 100          * tr->alloced is not set since the transaction structure is
 101          * on the stack */
 102         tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
 103         tr.tr_ip = _RET_IP_;
 104         if (gfs2_log_reserve(sdp, tr.tr_reserved) < 0)
 105                 return;
 106         WARN_ON_ONCE(current->journal_info);
 107         current->journal_info = &tr;
 108
 109         __gfs2_ail_flush(gl, 0, tr.tr_revokes);
 110
 111         gfs2_trans_end(sdp);
 112         gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
 113                        GFS2_LFC_AIL_EMPTY_GL);
 114 }
 115
 116 void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
 117 {
 118         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 119         unsigned int revokes = atomic_read(&gl->gl_ail_count);
 120         unsigned int max_revokes = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
 121         int ret;
 122
 123         if (!revokes)
 124                 return;
 125
 126         while (revokes > max_revokes)
 127                 max_revokes += (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64);
 128
 129         ret = gfs2_trans_begin(sdp, 0, max_revokes);
 130         if (ret)
 131                 return;
 132         __gfs2_ail_flush(gl, fsync, max_revokes);
 133         gfs2_trans_end(sdp);
 134         gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
 135                        GFS2_LFC_AIL_FLUSH);
 136 }
 137
 138 /**
 139  * rgrp_go_sync - sync out the metadata for this glock
 140  * @gl: the glock
 141  *
 142  * Called when demoting or unlocking an EX glock.  We must flush
 143  * to disk all dirty buffers/pages relating to this glock, and must not
 144  * return to caller to demote/unlock the glock until I/O is complete.
 145  */
 146
 147 static void rgrp_go_sync(struct gfs2_glock *gl)
 148 {
 149         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 150         struct address_space *mapping = &sdp->sd_aspace;
 151         struct gfs2_rgrpd *rgd;
 152         int error;
 153
 154         spin_lock(&gl->gl_lockref.lock);
 155         rgd = gl->gl_object;
 156         if (rgd)
 157                 gfs2_rgrp_brelse(rgd);
 158         spin_unlock(&gl->gl_lockref.lock);
 159
 160         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 161                 return;
 162         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 163
 164         gfs2_log_flush(sdp, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
 165                        GFS2_LFC_RGRP_GO_SYNC);
 166         filemap_fdatawrite_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 167         error = filemap_fdatawait_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 168         mapping_set_error(mapping, error);
 169         gfs2_ail_empty_gl(gl);
 170
 171         spin_lock(&gl->gl_lockref.lock);
 172         rgd = gl->gl_object;
 173         if (rgd)
 174                 gfs2_free_clones(rgd);
 175         spin_unlock(&gl->gl_lockref.lock);
 176 }
 177
 178 /**
 179  * rgrp_go_inval - invalidate the metadata for this glock
 180  * @gl: the glock
 181  * @flags:
 182  *
 183  * We never used LM_ST_DEFERRED with resource groups, so that we
 184  * should always see the metadata flag set here.
 185  *
 186  */
 187
 188 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 189 {
 190         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 191         struct address_space *mapping = &sdp->sd_aspace;
 192         struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
 193
 194         if (rgd)
 195                 gfs2_rgrp_brelse(rgd);
 196
 197         WARN_ON_ONCE(!(flags & DIO_METADATA));
 198         gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
 199         truncate_inode_pages_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 200
 201         if (rgd)
 202                 rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
 203 }
 204
 205 static struct gfs2_inode *gfs2_glock2inode(struct gfs2_glock *gl)
 206 {
 207         struct gfs2_inode *ip;
 208
 209         spin_lock(&gl->gl_lockref.lock);
 210         ip = gl->gl_object;
 211         if (ip)
 212                 set_bit(GIF_GLOP_PENDING, &ip->i_flags);
 213         spin_unlock(&gl->gl_lockref.lock);
 214         return ip;
 215 }
 216
 217 struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl)
 218 {
 219         struct gfs2_rgrpd *rgd;
 220
 221         spin_lock(&gl->gl_lockref.lock);
 222         rgd = gl->gl_object;
 223         spin_unlock(&gl->gl_lockref.lock);
 224
 225         return rgd;
 226 }
 227
 228 static void gfs2_clear_glop_pending(struct gfs2_inode *ip)
 229 {
 230         if (!ip)
 231                 return;
 232
 233         clear_bit_unlock(GIF_GLOP_PENDING, &ip->i_flags);
 234         wake_up_bit(&ip->i_flags, GIF_GLOP_PENDING);
 235 }
 236
 237 /**
 238  * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
 239  * @gl: the glock protecting the inode
 240  *
 241  */
 242
 243 static void inode_go_sync(struct gfs2_glock *gl)
 244 {
 245         struct gfs2_inode *ip = gfs2_glock2inode(gl);
 246         int isreg = ip && S_ISREG(ip->i_inode.i_mode);
 247         struct address_space *metamapping = gfs2_glock2aspace(gl);
 248         int error;
 249
 250         if (isreg) {
 251                 if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
 252                         unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
 253                 inode_dio_wait(&ip->i_inode);
 254         }
 255         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 256                 goto out;
 257
 258         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 259
 260         gfs2_log_flush(gl->gl_name.ln_sbd, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
 261                        GFS2_LFC_INODE_GO_SYNC);
 262         filemap_fdatawrite(metamapping);
 263         if (isreg) {
 264                 struct address_space *mapping = ip->i_inode.i_mapping;
 265                 filemap_fdatawrite(mapping);
 266                 error = filemap_fdatawait(mapping);
 267                 mapping_set_error(mapping, error);
 268         }
 269         error = filemap_fdatawait(metamapping);
 270         mapping_set_error(metamapping, error);
 271         gfs2_ail_empty_gl(gl);
 272         /*
 273          * Writeback of the data mapping may cause the dirty flag to be set
 274          * so we have to clear it again here.
 275          */
 276         smp_mb__before_atomic();
 277         clear_bit(GLF_DIRTY, &gl->gl_flags);
 278
 279 out:
 280         gfs2_clear_glop_pending(ip);
 281 }
 282
 283 /**
 284  * inode_go_inval - prepare a inode glock to be released
 285  * @gl: the glock
 286  * @flags:
 287  *
 288  * Normally we invalidate everything, but if we are moving into
 289  * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
 290  * can keep hold of the metadata, since it won't have changed.
 291  *
 292  */
 293
 294 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 295 {
 296         struct gfs2_inode *ip = gfs2_glock2inode(gl);
 297
 298         gfs2_assert_withdraw(gl->gl_name.ln_sbd, !atomic_read(&gl->gl_ail_count));
 299
 300         if (flags & DIO_METADATA) {
 301                 struct address_space *mapping = gfs2_glock2aspace(gl);
 302                 truncate_inode_pages(mapping, 0);
 303                 if (ip) {
 304                         set_bit(GIF_INVALID, &ip->i_flags);
 305                         forget_all_cached_acls(&ip->i_inode);
 306                         security_inode_invalidate_secctx(&ip->i_inode);
 307                         gfs2_dir_hash_inval(ip);
 308                 }
 309         }
 310
 311         if (ip == GFS2_I(gl->gl_name.ln_sbd->sd_rindex)) {
 312                 gfs2_log_flush(gl->gl_name.ln_sbd, NULL,
 313                                GFS2_LOG_HEAD_FLUSH_NORMAL |
 314                                GFS2_LFC_INODE_GO_INVAL);
 315                 gl->gl_name.ln_sbd->sd_rindex_uptodate = 0;
 316         }
 317         if (ip && S_ISREG(ip->i_inode.i_mode))
 318                 truncate_inode_pages(ip->i_inode.i_mapping, 0);
 319
 320         gfs2_clear_glop_pending(ip);
 321 }
 322
 323 /**
 324  * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
 325  * @gl: the glock
 326  *
 327  * Returns: 1 if it's ok
 328  */
 329
 330 static int inode_go_demote_ok(const struct gfs2_glock *gl)
 331 {
 332         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 333
 334         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
 335                 return 0;
 336
 337         return 1;
 338 }
 339
 340 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 341 {
 342         const struct gfs2_dinode *str = buf;
 343         struct timespec64 atime;
 344         u16 height, depth;
 345
 346         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
 347                 goto corrupt;
 348         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
 349         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
 350         ip->i_inode.i_rdev = 0;
 351         switch (ip->i_inode.i_mode & S_IFMT) {
 352         case S_IFBLK:
 353         case S_IFCHR:
 354                 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
 355                                            be32_to_cpu(str->di_minor));
 356                 break;
 357         };
 358
 359         i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid));
 360         i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid));
 361         set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
 362         i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
 363         gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
 364         atime.tv_sec = be64_to_cpu(str->di_atime);
 365         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
 366         if (timespec64_compare(&ip->i_inode.i_atime, &atime) < 0)
 367                 ip->i_inode.i_atime = atime;
 368         ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
 369         ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
 370         ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
 371         ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
 372
 373         ip->i_goal = be64_to_cpu(str->di_goal_meta);
 374         ip->i_generation = be64_to_cpu(str->di_generation);
 375
 376         ip->i_diskflags = be32_to_cpu(str->di_flags);
 377         ip->i_eattr = be64_to_cpu(str->di_eattr);
 378         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
 379         gfs2_set_inode_flags(&ip->i_inode);
 380         height = be16_to_cpu(str->di_height);
 381         if (unlikely(height > GFS2_MAX_META_HEIGHT))
 382                 goto corrupt;
 383         ip->i_height = (u8)height;
 384
 385         depth = be16_to_cpu(str->di_depth);
 386         if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
 387                 goto corrupt;
 388         ip->i_depth = (u8)depth;
 389         ip->i_entries = be32_to_cpu(str->di_entries);
 390
 391         if (S_ISREG(ip->i_inode.i_mode))
 392                 gfs2_set_aops(&ip->i_inode);
 393
 394         return 0;
 395 corrupt:
 396         gfs2_consist_inode(ip);
 397         return -EIO;
 398 }
 399
 400 /**
 401  * gfs2_inode_refresh - Refresh the incore copy of the dinode
 402  * @ip: The GFS2 inode
 403  *
 404  * Returns: errno
 405  */
 406
 407 int gfs2_inode_refresh(struct gfs2_inode *ip)
 408 {
 409         struct buffer_head *dibh;
 410         int error;
 411
 412         error = gfs2_meta_inode_buffer(ip, &dibh);
 413         if (error)
 414                 return error;
 415
 416         error = gfs2_dinode_in(ip, dibh->b_data);
 417         brelse(dibh);
 418         clear_bit(GIF_INVALID, &ip->i_flags);
 419
 420         return error;
 421 }
 422
 423 /**
 424  * inode_go_lock - operation done after an inode lock is locked by a process
 425  * @gl: the glock
 426  * @flags:
 427  *
 428  * Returns: errno
 429  */
 430
 431 static int inode_go_lock(struct gfs2_holder *gh)
 432 {
 433         struct gfs2_glock *gl = gh->gh_gl;
 434         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 435         struct gfs2_inode *ip = gl->gl_object;
 436         int error = 0;
 437
 438         if (!ip || (gh->gh_flags & GL_SKIP))
 439                 return 0;
 440
 441         if (test_bit(GIF_INVALID, &ip->i_flags)) {
 442                 error = gfs2_inode_refresh(ip);
 443                 if (error)
 444                         return error;
 445         }
 446
 447         if (gh->gh_state != LM_ST_DEFERRED)
 448                 inode_dio_wait(&ip->i_inode);
 449
 450         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
 451             (gl->gl_state == LM_ST_EXCLUSIVE) &&
 452             (gh->gh_state == LM_ST_EXCLUSIVE)) {
 453                 spin_lock(&sdp->sd_trunc_lock);
 454                 if (list_empty(&ip->i_trunc_list))
 455                         list_add(&ip->i_trunc_list, &sdp->sd_trunc_list);
 456                 spin_unlock(&sdp->sd_trunc_lock);
 457                 wake_up(&sdp->sd_quota_wait);
 458                 return 1;
 459         }
 460
 461         return error;
 462 }
 463
 464 /**
 465  * inode_go_dump - print information about an inode
 466  * @seq: The iterator
 467  * @ip: the inode
 468  *
 469  */
 470
 471 static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
 472 {
 473         const struct gfs2_inode *ip = gl->gl_object;
 474         if (ip == NULL)
 475                 return;
 476         gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
 477                   (unsigned long long)ip->i_no_formal_ino,
 478                   (unsigned long long)ip->i_no_addr,
 479                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
 480                   (unsigned int)ip->i_diskflags,
 481                   (unsigned long long)i_size_read(&ip->i_inode));
 482 }
 483
 484 /**
 485  * freeze_go_sync - promote/demote the freeze glock
 486  * @gl: the glock
 487  * @state: the requested state
 488  * @flags:
 489  *
 490  */
 491
 492 static void freeze_go_sync(struct gfs2_glock *gl)
 493 {
 494         int error = 0;
 495         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 496
 497         if (gl->gl_state == LM_ST_SHARED &&
 498             test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 499                 atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
 500                 error = freeze_super(sdp->sd_vfs);
 501                 if (error) {
 502                         printk(KERN_INFO "GFS2: couldn't freeze filesystem: %d\n", error);
 503                         gfs2_assert_withdraw(sdp, 0);
 504                 }
 505                 queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work);
 506                 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_FREEZE |
 507                                GFS2_LFC_FREEZE_GO_SYNC);
 508         }
 509 }
 510
 511 /**
 512  * freeze_go_xmote_bh - After promoting/demoting the freeze glock
 513  * @gl: the glock
 514  *
 515  */
 516
 517 static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
 518 {
 519         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 520         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 521         struct gfs2_glock *j_gl = ip->i_gl;
 522         struct gfs2_log_header_host head;
 523         int error;
 524
 525         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 526                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 527
 528                 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
 529                 if (error)
 530                         gfs2_consist(sdp);
 531                 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
 532                         gfs2_consist(sdp);
 533
 534                 /*  Initialize some head of the log stuff  */
 535                 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
 536                         sdp->sd_log_sequence = head.lh_sequence + 1;
 537                         gfs2_log_pointers_init(sdp, head.lh_blkno);
 538                 }
 539         }
 540         return 0;
 541 }
 542
 543 /**
 544  * trans_go_demote_ok
 545  * @gl: the glock
 546  *
 547  * Always returns 0
 548  */
 549
 550 static int freeze_go_demote_ok(const struct gfs2_glock *gl)
 551 {
 552         return 0;
 553 }
 554
 555 /**
 556  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
 557  * @gl: the glock
 558  *
 559  * gl_lockref.lock lock is held while calling this
 560  */
 561 static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
 562 {
 563         struct gfs2_inode *ip = gl->gl_object;
 564         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 565
 566         if (!remote || sb_rdonly(sdp->sd_vfs))
 567                 return;
 568
 569         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
 570             gl->gl_state == LM_ST_SHARED && ip) {
 571                 gl->gl_lockref.count++;
 572                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
 573                         gl->gl_lockref.count--;
 574         }
 575 }
 576
 577 const struct gfs2_glock_operations gfs2_meta_glops = {
 578         .go_type = LM_TYPE_META,
 579 };
 580
 581 const struct gfs2_glock_operations gfs2_inode_glops = {
 582         .go_sync = inode_go_sync,
 583         .go_inval = inode_go_inval,
 584         .go_demote_ok = inode_go_demote_ok,
 585         .go_lock = inode_go_lock,
 586         .go_dump = inode_go_dump,
 587         .go_type = LM_TYPE_INODE,
 588         .go_flags = GLOF_ASPACE | GLOF_LRU,
 589 };
 590
 591 const struct gfs2_glock_operations gfs2_rgrp_glops = {
 592         .go_sync = rgrp_go_sync,
 593         .go_inval = rgrp_go_inval,
 594         .go_lock = gfs2_rgrp_go_lock,
 595         .go_unlock = gfs2_rgrp_go_unlock,
 596         .go_dump = gfs2_rgrp_dump,
 597         .go_type = LM_TYPE_RGRP,
 598         .go_flags = GLOF_LVB,
 599 };
 600
 601 const struct gfs2_glock_operations gfs2_freeze_glops = {
 602         .go_sync = freeze_go_sync,
 603         .go_xmote_bh = freeze_go_xmote_bh,
 604         .go_demote_ok = freeze_go_demote_ok,
 605         .go_type = LM_TYPE_NONDISK,
 606 };
 607
 608 const struct gfs2_glock_operations gfs2_iopen_glops = {
 609         .go_type = LM_TYPE_IOPEN,
 610         .go_callback = iopen_go_callback,
 611         .go_flags = GLOF_LRU,
 612 };
 613
 614 const struct gfs2_glock_operations gfs2_flock_glops = {
 615         .go_type = LM_TYPE_FLOCK,
 616         .go_flags = GLOF_LRU,
 617 };
 618
 619 const struct gfs2_glock_operations gfs2_nondisk_glops = {
 620         .go_type = LM_TYPE_NONDISK,
 621 };
 622
 623 const struct gfs2_glock_operations gfs2_quota_glops = {
 624         .go_type = LM_TYPE_QUOTA,
 625         .go_flags = GLOF_LVB | GLOF_LRU,
 626 };
 627
 628 const struct gfs2_glock_operations gfs2_journal_glops = {
 629         .go_type = LM_TYPE_JOURNAL,
 630 };
 631
 632 const struct gfs2_glock_operations *gfs2_glops_list[] = {
 633         [LM_TYPE_META] = &gfs2_meta_glops,
 634         [LM_TYPE_INODE] = &gfs2_inode_glops,
 635         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
 636         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
 637         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
 638         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
 639         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
 640         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
 641 };
 642