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, NORMAL_FLUSH);
 113 }
 114
 115 void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
 116 {
 117         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 118         unsigned int revokes = atomic_read(&gl->gl_ail_count);
 119         unsigned int max_revokes = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
 120         int ret;
 121
 122         if (!revokes)
 123                 return;
 124
 125         while (revokes > max_revokes)
 126                 max_revokes += (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64);
 127
 128         ret = gfs2_trans_begin(sdp, 0, max_revokes);
 129         if (ret)
 130                 return;
 131         __gfs2_ail_flush(gl, fsync, max_revokes);
 132         gfs2_trans_end(sdp);
 133         gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
 134 }
 135
 136 /**
 137  * rgrp_go_sync - sync out the metadata for this glock
 138  * @gl: the glock
 139  *
 140  * Called when demoting or unlocking an EX glock.  We must flush
 141  * to disk all dirty buffers/pages relating to this glock, and must not
 142  * return to caller to demote/unlock the glock until I/O is complete.
 143  */
 144
 145 static void rgrp_go_sync(struct gfs2_glock *gl)
 146 {
 147         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 148         struct address_space *mapping = &sdp->sd_aspace;
 149         struct gfs2_rgrpd *rgd;
 150         int error;
 151
 152         spin_lock(&gl->gl_lockref.lock);
 153         rgd = gl->gl_object;
 154         if (rgd)
 155                 gfs2_rgrp_brelse(rgd);
 156         spin_unlock(&gl->gl_lockref.lock);
 157
 158         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 159                 return;
 160         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 161
 162         gfs2_log_flush(sdp, gl, NORMAL_FLUSH);
 163         filemap_fdatawrite_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 164         error = filemap_fdatawait_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 165         mapping_set_error(mapping, error);
 166         gfs2_ail_empty_gl(gl);
 167
 168         spin_lock(&gl->gl_lockref.lock);
 169         rgd = gl->gl_object;
 170         if (rgd)
 171                 gfs2_free_clones(rgd);
 172         spin_unlock(&gl->gl_lockref.lock);
 173 }
 174
 175 /**
 176  * rgrp_go_inval - invalidate the metadata for this glock
 177  * @gl: the glock
 178  * @flags:
 179  *
 180  * We never used LM_ST_DEFERRED with resource groups, so that we
 181  * should always see the metadata flag set here.
 182  *
 183  */
 184
 185 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 186 {
 187         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 188         struct address_space *mapping = &sdp->sd_aspace;
 189         struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
 190
 191         if (rgd)
 192                 gfs2_rgrp_brelse(rgd);
 193
 194         WARN_ON_ONCE(!(flags & DIO_METADATA));
 195         gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
 196         truncate_inode_pages_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 197
 198         if (rgd)
 199                 rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
 200 }
 201
 202 static struct gfs2_inode *gfs2_glock2inode(struct gfs2_glock *gl)
 203 {
 204         struct gfs2_inode *ip;
 205
 206         spin_lock(&gl->gl_lockref.lock);
 207         ip = gl->gl_object;
 208         if (ip)
 209                 set_bit(GIF_GLOP_PENDING, &ip->i_flags);
 210         spin_unlock(&gl->gl_lockref.lock);
 211         return ip;
 212 }
 213
 214 struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl)
 215 {
 216         struct gfs2_rgrpd *rgd;
 217
 218         spin_lock(&gl->gl_lockref.lock);
 219         rgd = gl->gl_object;
 220         spin_unlock(&gl->gl_lockref.lock);
 221
 222         return rgd;
 223 }
 224
 225 static void gfs2_clear_glop_pending(struct gfs2_inode *ip)
 226 {
 227         if (!ip)
 228                 return;
 229
 230         clear_bit_unlock(GIF_GLOP_PENDING, &ip->i_flags);
 231         wake_up_bit(&ip->i_flags, GIF_GLOP_PENDING);
 232 }
 233
 234 /**
 235  * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
 236  * @gl: the glock protecting the inode
 237  *
 238  */
 239
 240 static void inode_go_sync(struct gfs2_glock *gl)
 241 {
 242         struct gfs2_inode *ip = gfs2_glock2inode(gl);
 243         int isreg = ip && S_ISREG(ip->i_inode.i_mode);
 244         struct address_space *metamapping = gfs2_glock2aspace(gl);
 245         int error;
 246
 247         if (isreg) {
 248                 if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
 249                         unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
 250                 inode_dio_wait(&ip->i_inode);
 251         }
 252         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 253                 goto out;
 254
 255         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 256
 257         gfs2_log_flush(gl->gl_name.ln_sbd, gl, NORMAL_FLUSH);
 258         filemap_fdatawrite(metamapping);
 259         if (isreg) {
 260                 struct address_space *mapping = ip->i_inode.i_mapping;
 261                 filemap_fdatawrite(mapping);
 262                 error = filemap_fdatawait(mapping);
 263                 mapping_set_error(mapping, error);
 264         }
 265         error = filemap_fdatawait(metamapping);
 266         mapping_set_error(metamapping, error);
 267         gfs2_ail_empty_gl(gl);
 268         /*
 269          * Writeback of the data mapping may cause the dirty flag to be set
 270          * so we have to clear it again here.
 271          */
 272         smp_mb__before_atomic();
 273         clear_bit(GLF_DIRTY, &gl->gl_flags);
 274
 275 out:
 276         gfs2_clear_glop_pending(ip);
 277 }
 278
 279 /**
 280  * inode_go_inval - prepare a inode glock to be released
 281  * @gl: the glock
 282  * @flags:
 283  *
 284  * Normally we invalidate everything, but if we are moving into
 285  * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
 286  * can keep hold of the metadata, since it won't have changed.
 287  *
 288  */
 289
 290 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 291 {
 292         struct gfs2_inode *ip = gfs2_glock2inode(gl);
 293
 294         gfs2_assert_withdraw(gl->gl_name.ln_sbd, !atomic_read(&gl->gl_ail_count));
 295
 296         if (flags & DIO_METADATA) {
 297                 struct address_space *mapping = gfs2_glock2aspace(gl);
 298                 truncate_inode_pages(mapping, 0);
 299                 if (ip) {
 300                         set_bit(GIF_INVALID, &ip->i_flags);
 301                         forget_all_cached_acls(&ip->i_inode);
 302                         security_inode_invalidate_secctx(&ip->i_inode);
 303                         gfs2_dir_hash_inval(ip);
 304                 }
 305         }
 306
 307         if (ip == GFS2_I(gl->gl_name.ln_sbd->sd_rindex)) {
 308                 gfs2_log_flush(gl->gl_name.ln_sbd, NULL, NORMAL_FLUSH);
 309                 gl->gl_name.ln_sbd->sd_rindex_uptodate = 0;
 310         }
 311         if (ip && S_ISREG(ip->i_inode.i_mode))
 312                 truncate_inode_pages(ip->i_inode.i_mapping, 0);
 313
 314         gfs2_clear_glop_pending(ip);
 315 }
 316
 317 /**
 318  * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
 319  * @gl: the glock
 320  *
 321  * Returns: 1 if it's ok
 322  */
 323
 324 static int inode_go_demote_ok(const struct gfs2_glock *gl)
 325 {
 326         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 327
 328         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
 329                 return 0;
 330
 331         return 1;
 332 }
 333
 334 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 335 {
 336         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 337         const struct gfs2_dinode *str = buf;
 338         struct timespec atime;
 339         u16 height, depth;
 340
 341         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
 342                 goto corrupt;
 343         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
 344         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
 345         ip->i_inode.i_rdev = 0;
 346         switch (ip->i_inode.i_mode & S_IFMT) {
 347         case S_IFBLK:
 348         case S_IFCHR:
 349                 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
 350                                            be32_to_cpu(str->di_minor));
 351                 break;
 352         };
 353
 354         i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid));
 355         i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid));
 356         set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
 357         i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
 358         gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
 359         atime.tv_sec = be64_to_cpu(str->di_atime);
 360         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
 361         if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
 362                 ip->i_inode.i_atime = atime;
 363         ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
 364         ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
 365         ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
 366         ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
 367
 368         ip->i_goal = be64_to_cpu(str->di_goal_meta);
 369         ip->i_generation = be64_to_cpu(str->di_generation);
 370
 371         ip->i_diskflags = be32_to_cpu(str->di_flags);
 372         ip->i_eattr = be64_to_cpu(str->di_eattr);
 373         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
 374         gfs2_set_inode_flags(&ip->i_inode);
 375         height = be16_to_cpu(str->di_height);
 376         if (unlikely(height > sdp->sd_max_height))
 377                 goto corrupt;
 378         ip->i_height = (u8)height;
 379
 380         depth = be16_to_cpu(str->di_depth);
 381         if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
 382                 goto corrupt;
 383         ip->i_depth = (u8)depth;
 384         ip->i_entries = be32_to_cpu(str->di_entries);
 385
 386         if (S_ISREG(ip->i_inode.i_mode))
 387                 gfs2_set_aops(&ip->i_inode);
 388
 389         return 0;
 390 corrupt:
 391         gfs2_consist_inode(ip);
 392         return -EIO;
 393 }
 394
 395 /**
 396  * gfs2_inode_refresh - Refresh the incore copy of the dinode
 397  * @ip: The GFS2 inode
 398  *
 399  * Returns: errno
 400  */
 401
 402 int gfs2_inode_refresh(struct gfs2_inode *ip)
 403 {
 404         struct buffer_head *dibh;
 405         int error;
 406
 407         error = gfs2_meta_inode_buffer(ip, &dibh);
 408         if (error)
 409                 return error;
 410
 411         error = gfs2_dinode_in(ip, dibh->b_data);
 412         brelse(dibh);
 413         clear_bit(GIF_INVALID, &ip->i_flags);
 414
 415         return error;
 416 }
 417
 418 /**
 419  * inode_go_lock - operation done after an inode lock is locked by a process
 420  * @gl: the glock
 421  * @flags:
 422  *
 423  * Returns: errno
 424  */
 425
 426 static int inode_go_lock(struct gfs2_holder *gh)
 427 {
 428         struct gfs2_glock *gl = gh->gh_gl;
 429         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 430         struct gfs2_inode *ip = gl->gl_object;
 431         int error = 0;
 432
 433         if (!ip || (gh->gh_flags & GL_SKIP))
 434                 return 0;
 435
 436         if (test_bit(GIF_INVALID, &ip->i_flags)) {
 437                 error = gfs2_inode_refresh(ip);
 438                 if (error)
 439                         return error;
 440         }
 441
 442         if (gh->gh_state != LM_ST_DEFERRED)
 443                 inode_dio_wait(&ip->i_inode);
 444
 445         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
 446             (gl->gl_state == LM_ST_EXCLUSIVE) &&
 447             (gh->gh_state == LM_ST_EXCLUSIVE)) {
 448                 spin_lock(&sdp->sd_trunc_lock);
 449                 if (list_empty(&ip->i_trunc_list))
 450                         list_add(&ip->i_trunc_list, &sdp->sd_trunc_list);
 451                 spin_unlock(&sdp->sd_trunc_lock);
 452                 wake_up(&sdp->sd_quota_wait);
 453                 return 1;
 454         }
 455
 456         return error;
 457 }
 458
 459 /**
 460  * inode_go_dump - print information about an inode
 461  * @seq: The iterator
 462  * @ip: the inode
 463  *
 464  */
 465
 466 static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
 467 {
 468         const struct gfs2_inode *ip = gl->gl_object;
 469         if (ip == NULL)
 470                 return;
 471         gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
 472                   (unsigned long long)ip->i_no_formal_ino,
 473                   (unsigned long long)ip->i_no_addr,
 474                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
 475                   (unsigned int)ip->i_diskflags,
 476                   (unsigned long long)i_size_read(&ip->i_inode));
 477 }
 478
 479 /**
 480  * freeze_go_sync - promote/demote the freeze glock
 481  * @gl: the glock
 482  * @state: the requested state
 483  * @flags:
 484  *
 485  */
 486
 487 static void freeze_go_sync(struct gfs2_glock *gl)
 488 {
 489         int error = 0;
 490         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 491
 492         if (gl->gl_state == LM_ST_SHARED &&
 493             test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 494                 atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
 495                 error = freeze_super(sdp->sd_vfs);
 496                 if (error) {
 497                         printk(KERN_INFO "GFS2: couldn't freeze filesystem: %d\n", error);
 498                         gfs2_assert_withdraw(sdp, 0);
 499                 }
 500                 queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work);
 501                 gfs2_log_flush(sdp, NULL, FREEZE_FLUSH);
 502         }
 503 }
 504
 505 /**
 506  * freeze_go_xmote_bh - After promoting/demoting the freeze glock
 507  * @gl: the glock
 508  *
 509  */
 510
 511 static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
 512 {
 513         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 514         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 515         struct gfs2_glock *j_gl = ip->i_gl;
 516         struct gfs2_log_header_host head;
 517         int error;
 518
 519         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 520                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 521
 522                 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
 523                 if (error)
 524                         gfs2_consist(sdp);
 525                 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
 526                         gfs2_consist(sdp);
 527
 528                 /*  Initialize some head of the log stuff  */
 529                 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
 530                         sdp->sd_log_sequence = head.lh_sequence + 1;
 531                         gfs2_log_pointers_init(sdp, head.lh_blkno);
 532                 }
 533         }
 534         return 0;
 535 }
 536
 537 /**
 538  * trans_go_demote_ok
 539  * @gl: the glock
 540  *
 541  * Always returns 0
 542  */
 543
 544 static int freeze_go_demote_ok(const struct gfs2_glock *gl)
 545 {
 546         return 0;
 547 }
 548
 549 /**
 550  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
 551  * @gl: the glock
 552  *
 553  * gl_lockref.lock lock is held while calling this
 554  */
 555 static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
 556 {
 557         struct gfs2_inode *ip = gl->gl_object;
 558         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 559
 560         if (!remote || sb_rdonly(sdp->sd_vfs))
 561                 return;
 562
 563         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
 564             gl->gl_state == LM_ST_SHARED && ip) {
 565                 gl->gl_lockref.count++;
 566                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
 567                         gl->gl_lockref.count--;
 568         }
 569 }
 570
 571 const struct gfs2_glock_operations gfs2_meta_glops = {
 572         .go_type = LM_TYPE_META,
 573 };
 574
 575 const struct gfs2_glock_operations gfs2_inode_glops = {
 576         .go_sync = inode_go_sync,
 577         .go_inval = inode_go_inval,
 578         .go_demote_ok = inode_go_demote_ok,
 579         .go_lock = inode_go_lock,
 580         .go_dump = inode_go_dump,
 581         .go_type = LM_TYPE_INODE,
 582         .go_flags = GLOF_ASPACE | GLOF_LRU,
 583 };
 584
 585 const struct gfs2_glock_operations gfs2_rgrp_glops = {
 586         .go_sync = rgrp_go_sync,
 587         .go_inval = rgrp_go_inval,
 588         .go_lock = gfs2_rgrp_go_lock,
 589         .go_unlock = gfs2_rgrp_go_unlock,
 590         .go_dump = gfs2_rgrp_dump,
 591         .go_type = LM_TYPE_RGRP,
 592         .go_flags = GLOF_LVB,
 593 };
 594
 595 const struct gfs2_glock_operations gfs2_freeze_glops = {
 596         .go_sync = freeze_go_sync,
 597         .go_xmote_bh = freeze_go_xmote_bh,
 598         .go_demote_ok = freeze_go_demote_ok,
 599         .go_type = LM_TYPE_NONDISK,
 600 };
 601
 602 const struct gfs2_glock_operations gfs2_iopen_glops = {
 603         .go_type = LM_TYPE_IOPEN,
 604         .go_callback = iopen_go_callback,
 605         .go_flags = GLOF_LRU,
 606 };
 607
 608 const struct gfs2_glock_operations gfs2_flock_glops = {
 609         .go_type = LM_TYPE_FLOCK,
 610         .go_flags = GLOF_LRU,
 611 };
 612
 613 const struct gfs2_glock_operations gfs2_nondisk_glops = {
 614         .go_type = LM_TYPE_NONDISK,
 615 };
 616
 617 const struct gfs2_glock_operations gfs2_quota_glops = {
 618         .go_type = LM_TYPE_QUOTA,
 619         .go_flags = GLOF_LVB | GLOF_LRU,
 620 };
 621
 622 const struct gfs2_glock_operations gfs2_journal_glops = {
 623         .go_type = LM_TYPE_JOURNAL,
 624 };
 625
 626 const struct gfs2_glock_operations *gfs2_glops_list[] = {
 627         [LM_TYPE_META] = &gfs2_meta_glops,
 628         [LM_TYPE_INODE] = &gfs2_inode_glops,
 629         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
 630         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
 631         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
 632         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
 633         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
 634         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
 635 };
 636