fs/gfs2/glops.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
   5  */
   6
   7 #include <linux/spinlock.h>
   8 #include <linux/completion.h>
   9 #include <linux/buffer_head.h>
  10 #include <linux/gfs2_ondisk.h>
  11 #include <linux/bio.h>
  12 #include <linux/posix_acl.h>
  13 #include <linux/security.h>
  14
  15 #include "gfs2.h"
  16 #include "incore.h"
  17 #include "bmap.h"
  18 #include "glock.h"
  19 #include "glops.h"
  20 #include "inode.h"
  21 #include "log.h"
  22 #include "meta_io.h"
  23 #include "recovery.h"
  24 #include "rgrp.h"
  25 #include "util.h"
  26 #include "trans.h"
  27 #include "dir.h"
  28 #include "lops.h"
  29
  30 struct workqueue_struct *gfs2_freeze_wq;
  31
  32 static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
  33 {
  34         fs_err(gl->gl_name.ln_sbd,
  35                "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page "
  36                "state 0x%lx\n",
  37                bh, (unsigned long long)bh->b_blocknr, bh->b_state,
  38                bh->b_page->mapping, bh->b_page->flags);
  39         fs_err(gl->gl_name.ln_sbd, "AIL glock %u:%llu mapping %p\n",
  40                gl->gl_name.ln_type, gl->gl_name.ln_number,
  41                gfs2_glock2aspace(gl));
  42         gfs2_lm_withdraw(gl->gl_name.ln_sbd, "AIL error\n");
  43 }
  44
  45 /**
  46  * __gfs2_ail_flush - remove all buffers for a given lock from the AIL
  47  * @gl: the glock
  48  * @fsync: set when called from fsync (not all buffers will be clean)
  49  *
  50  * None of the buffers should be dirty, locked, or pinned.
  51  */
  52
  53 static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync,
  54                              unsigned int nr_revokes)
  55 {
  56         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
  57         struct list_head *head = &gl->gl_ail_list;
  58         struct gfs2_bufdata *bd, *tmp;
  59         struct buffer_head *bh;
  60         const unsigned long b_state = (1UL << BH_Dirty)|(1UL << BH_Pinned)|(1UL << BH_Lock);
  61
  62         gfs2_log_lock(sdp);
  63         spin_lock(&sdp->sd_ail_lock);
  64         list_for_each_entry_safe_reverse(bd, tmp, head, bd_ail_gl_list) {
  65                 if (nr_revokes == 0)
  66                         break;
  67                 bh = bd->bd_bh;
  68                 if (bh->b_state & b_state) {
  69                         if (fsync)
  70                                 continue;
  71                         gfs2_ail_error(gl, bh);
  72                 }
  73                 gfs2_trans_add_revoke(sdp, bd);
  74                 nr_revokes--;
  75         }
  76         GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count));
  77         spin_unlock(&sdp->sd_ail_lock);
  78         gfs2_log_unlock(sdp);
  79 }
  80
  81
  82 static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
  83 {
  84         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
  85         struct gfs2_trans tr;
  86
  87         memset(&tr, 0, sizeof(tr));
  88         INIT_LIST_HEAD(&tr.tr_buf);
  89         INIT_LIST_HEAD(&tr.tr_databuf);
  90         INIT_LIST_HEAD(&tr.tr_ail1_list);
  91         INIT_LIST_HEAD(&tr.tr_ail2_list);
  92         tr.tr_revokes = atomic_read(&gl->gl_ail_count);
  93
  94         if (!tr.tr_revokes) {
  95                 bool have_revokes;
  96                 bool log_in_flight;
  97
  98                 /*
  99                  * We have nothing on the ail, but there could be revokes on
 100                  * the sdp revoke queue, in which case, we still want to flush
 101                  * the log and wait for it to finish.
 102                  *
 103                  * If the sdp revoke list is empty too, we might still have an
 104                  * io outstanding for writing revokes, so we should wait for
 105                  * it before returning.
 106                  *
 107                  * If none of these conditions are true, our revokes are all
 108                  * flushed and we can return.
 109                  */
 110                 gfs2_log_lock(sdp);
 111                 have_revokes = !list_empty(&sdp->sd_log_revokes);
 112                 log_in_flight = atomic_read(&sdp->sd_log_in_flight);
 113                 gfs2_log_unlock(sdp);
 114                 if (have_revokes)
 115                         goto flush;
 116                 if (log_in_flight)
 117                         log_flush_wait(sdp);
 118                 return;
 119         }
 120
 121         /* A shortened, inline version of gfs2_trans_begin()
 122          * tr->alloced is not set since the transaction structure is
 123          * on the stack */
 124         tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
 125         tr.tr_ip = _RET_IP_;
 126         if (gfs2_log_reserve(sdp, tr.tr_reserved) < 0)
 127                 return;
 128         WARN_ON_ONCE(current->journal_info);
 129         current->journal_info = &tr;
 130
 131         __gfs2_ail_flush(gl, 0, tr.tr_revokes);
 132
 133         gfs2_trans_end(sdp);
 134 flush:
 135         gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
 136                        GFS2_LFC_AIL_EMPTY_GL);
 137 }
 138
 139 void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
 140 {
 141         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 142         unsigned int revokes = atomic_read(&gl->gl_ail_count);
 143         unsigned int max_revokes = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / sizeof(u64);
 144         int ret;
 145
 146         if (!revokes)
 147                 return;
 148
 149         while (revokes > max_revokes)
 150                 max_revokes += (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64);
 151
 152         ret = gfs2_trans_begin(sdp, 0, max_revokes);
 153         if (ret)
 154                 return;
 155         __gfs2_ail_flush(gl, fsync, max_revokes);
 156         gfs2_trans_end(sdp);
 157         gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
 158                        GFS2_LFC_AIL_FLUSH);
 159 }
 160
 161 /**
 162  * rgrp_go_sync - sync out the metadata for this glock
 163  * @gl: the glock
 164  *
 165  * Called when demoting or unlocking an EX glock.  We must flush
 166  * to disk all dirty buffers/pages relating to this glock, and must not
 167  * return to caller to demote/unlock the glock until I/O is complete.
 168  */
 169
 170 static void rgrp_go_sync(struct gfs2_glock *gl)
 171 {
 172         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 173         struct address_space *mapping = &sdp->sd_aspace;
 174         struct gfs2_rgrpd *rgd;
 175         int error;
 176
 177         spin_lock(&gl->gl_lockref.lock);
 178         rgd = gl->gl_object;
 179         if (rgd)
 180                 gfs2_rgrp_brelse(rgd);
 181         spin_unlock(&gl->gl_lockref.lock);
 182
 183         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 184                 return;
 185         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 186
 187         gfs2_log_flush(sdp, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
 188                        GFS2_LFC_RGRP_GO_SYNC);
 189         filemap_fdatawrite_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 190         error = filemap_fdatawait_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 191         mapping_set_error(mapping, error);
 192         gfs2_ail_empty_gl(gl);
 193
 194         spin_lock(&gl->gl_lockref.lock);
 195         rgd = gl->gl_object;
 196         if (rgd)
 197                 gfs2_free_clones(rgd);
 198         spin_unlock(&gl->gl_lockref.lock);
 199 }
 200
 201 /**
 202  * rgrp_go_inval - invalidate the metadata for this glock
 203  * @gl: the glock
 204  * @flags:
 205  *
 206  * We never used LM_ST_DEFERRED with resource groups, so that we
 207  * should always see the metadata flag set here.
 208  *
 209  */
 210
 211 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
 212 {
 213         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 214         struct address_space *mapping = &sdp->sd_aspace;
 215         struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
 216
 217         if (rgd)
 218                 gfs2_rgrp_brelse(rgd);
 219
 220         WARN_ON_ONCE(!(flags & DIO_METADATA));
 221         gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
 222         truncate_inode_pages_range(mapping, gl->gl_vm.start, gl->gl_vm.end);
 223
 224         if (rgd)
 225                 rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
 226 }
 227
 228 static struct gfs2_inode *gfs2_glock2inode(struct gfs2_glock *gl)
 229 {
 230         struct gfs2_inode *ip;
 231
 232         spin_lock(&gl->gl_lockref.lock);
 233         ip = gl->gl_object;
 234         if (ip)
 235                 set_bit(GIF_GLOP_PENDING, &ip->i_flags);
 236         spin_unlock(&gl->gl_lockref.lock);
 237         return ip;
 238 }
 239
 240 struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl)
 241 {
 242         struct gfs2_rgrpd *rgd;
 243
 244         spin_lock(&gl->gl_lockref.lock);
 245         rgd = gl->gl_object;
 246         spin_unlock(&gl->gl_lockref.lock);
 247
 248         return rgd;
 249 }
 250
 251 static void gfs2_clear_glop_pending(struct gfs2_inode *ip)
 252 {
 253         if (!ip)
 254                 return;
 255
 256         clear_bit_unlock(GIF_GLOP_PENDING, &ip->i_flags);
 257         wake_up_bit(&ip->i_flags, GIF_GLOP_PENDING);
 258 }
 259
 260 /**
 261  * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
 262  * @gl: the glock protecting the inode
 263  *
 264  */
 265
 266 static void inode_go_sync(struct gfs2_glock *gl)
 267 {
 268         struct gfs2_inode *ip = gfs2_glock2inode(gl);
 269         int isreg = ip && S_ISREG(ip->i_inode.i_mode);
 270         struct address_space *metamapping = gfs2_glock2aspace(gl);
 271         int error;
 272
 273         if (isreg) {
 274                 if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
 275                         unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
 276                 inode_dio_wait(&ip->i_inode);
 277         }
 278         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
 279                 goto out;
 280
 281         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
 282
 283         gfs2_log_flush(gl->gl_name.ln_sbd, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
 284                        GFS2_LFC_INODE_GO_SYNC);
 285         filemap_fdatawrite(metamapping);
 286         if (isreg) {
 287                 struct address_space *mapping = ip->i_inode.i_mapping;
 288                 filemap_fdatawrite(mapping);
 289                 error = filemap_fdatawait(mapping);
 290                 mapping_set_error(mapping, error);
 291         }
 292         error = filemap_fdatawait(metamapping);
 293         mapping_set_error(metamapping, error);
 294         gfs2_ail_empty_gl(gl);
 295         /*
 296          * Writeback of the data mapping may cause the dirty flag to be set
 297          * so we have to clear it again here.
 298          */
 299         smp_mb__before_atomic();
 300         clear_bit(GLF_DIRTY, &gl->gl_flags);
 301
 302 out:
 303         gfs2_clear_glop_pending(ip);
 304 }
 305
 306 /**
 307  * inode_go_inval - prepare a inode glock to be released
 308  * @gl: the glock
 309  * @flags:
 310  *
 311  * Normally we invalidate everything, but if we are moving into
 312  * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
 313  * can keep hold of the metadata, since it won't have changed.
 314  *
 315  */
 316
 317 static void inode_go_inval(struct gfs2_glock *gl, int flags)
 318 {
 319         struct gfs2_inode *ip = gfs2_glock2inode(gl);
 320
 321         gfs2_assert_withdraw(gl->gl_name.ln_sbd, !atomic_read(&gl->gl_ail_count));
 322
 323         if (flags & DIO_METADATA) {
 324                 struct address_space *mapping = gfs2_glock2aspace(gl);
 325                 truncate_inode_pages(mapping, 0);
 326                 if (ip) {
 327                         set_bit(GIF_INVALID, &ip->i_flags);
 328                         forget_all_cached_acls(&ip->i_inode);
 329                         security_inode_invalidate_secctx(&ip->i_inode);
 330                         gfs2_dir_hash_inval(ip);
 331                 }
 332         }
 333
 334         if (ip == GFS2_I(gl->gl_name.ln_sbd->sd_rindex)) {
 335                 gfs2_log_flush(gl->gl_name.ln_sbd, NULL,
 336                                GFS2_LOG_HEAD_FLUSH_NORMAL |
 337                                GFS2_LFC_INODE_GO_INVAL);
 338                 gl->gl_name.ln_sbd->sd_rindex_uptodate = 0;
 339         }
 340         if (ip && S_ISREG(ip->i_inode.i_mode))
 341                 truncate_inode_pages(ip->i_inode.i_mapping, 0);
 342
 343         gfs2_clear_glop_pending(ip);
 344 }
 345
 346 /**
 347  * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
 348  * @gl: the glock
 349  *
 350  * Returns: 1 if it's ok
 351  */
 352
 353 static int inode_go_demote_ok(const struct gfs2_glock *gl)
 354 {
 355         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 356
 357         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
 358                 return 0;
 359
 360         return 1;
 361 }
 362
 363 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
 364 {
 365         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 366         const struct gfs2_dinode *str = buf;
 367         struct timespec64 atime;
 368         u16 height, depth;
 369
 370         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
 371                 goto corrupt;
 372         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
 373         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
 374         ip->i_inode.i_rdev = 0;
 375         switch (ip->i_inode.i_mode & S_IFMT) {
 376         case S_IFBLK:
 377         case S_IFCHR:
 378                 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
 379                                            be32_to_cpu(str->di_minor));
 380                 break;
 381         };
 382
 383         i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid));
 384         i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid));
 385         set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
 386         i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
 387         gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
 388         atime.tv_sec = be64_to_cpu(str->di_atime);
 389         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
 390         if (timespec64_compare(&ip->i_inode.i_atime, &atime) < 0)
 391                 ip->i_inode.i_atime = atime;
 392         ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
 393         ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
 394         ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
 395         ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
 396
 397         ip->i_goal = be64_to_cpu(str->di_goal_meta);
 398         ip->i_generation = be64_to_cpu(str->di_generation);
 399
 400         ip->i_diskflags = be32_to_cpu(str->di_flags);
 401         ip->i_eattr = be64_to_cpu(str->di_eattr);
 402         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
 403         gfs2_set_inode_flags(&ip->i_inode);
 404         height = be16_to_cpu(str->di_height);
 405         if (unlikely(height > sdp->sd_max_height))
 406                 goto corrupt;
 407         ip->i_height = (u8)height;
 408
 409         depth = be16_to_cpu(str->di_depth);
 410         if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
 411                 goto corrupt;
 412         ip->i_depth = (u8)depth;
 413         ip->i_entries = be32_to_cpu(str->di_entries);
 414
 415         if (gfs2_is_stuffed(ip) && ip->i_inode.i_size > gfs2_max_stuffed_size(ip))
 416                 goto corrupt;
 417
 418         if (S_ISREG(ip->i_inode.i_mode))
 419                 gfs2_set_aops(&ip->i_inode);
 420
 421         return 0;
 422 corrupt:
 423         gfs2_consist_inode(ip);
 424         return -EIO;
 425 }
 426
 427 /**
 428  * gfs2_inode_refresh - Refresh the incore copy of the dinode
 429  * @ip: The GFS2 inode
 430  *
 431  * Returns: errno
 432  */
 433
 434 int gfs2_inode_refresh(struct gfs2_inode *ip)
 435 {
 436         struct buffer_head *dibh;
 437         int error;
 438
 439         error = gfs2_meta_inode_buffer(ip, &dibh);
 440         if (error)
 441                 return error;
 442
 443         error = gfs2_dinode_in(ip, dibh->b_data);
 444         brelse(dibh);
 445         clear_bit(GIF_INVALID, &ip->i_flags);
 446
 447         return error;
 448 }
 449
 450 /**
 451  * inode_go_lock - operation done after an inode lock is locked by a process
 452  * @gl: the glock
 453  * @flags:
 454  *
 455  * Returns: errno
 456  */
 457
 458 static int inode_go_lock(struct gfs2_holder *gh)
 459 {
 460         struct gfs2_glock *gl = gh->gh_gl;
 461         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 462         struct gfs2_inode *ip = gl->gl_object;
 463         int error = 0;
 464
 465         if (!ip || (gh->gh_flags & GL_SKIP))
 466                 return 0;
 467
 468         if (test_bit(GIF_INVALID, &ip->i_flags)) {
 469                 error = gfs2_inode_refresh(ip);
 470                 if (error)
 471                         return error;
 472         }
 473
 474         if (gh->gh_state != LM_ST_DEFERRED)
 475                 inode_dio_wait(&ip->i_inode);
 476
 477         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
 478             (gl->gl_state == LM_ST_EXCLUSIVE) &&
 479             (gh->gh_state == LM_ST_EXCLUSIVE)) {
 480                 spin_lock(&sdp->sd_trunc_lock);
 481                 if (list_empty(&ip->i_trunc_list))
 482                         list_add(&ip->i_trunc_list, &sdp->sd_trunc_list);
 483                 spin_unlock(&sdp->sd_trunc_lock);
 484                 wake_up(&sdp->sd_quota_wait);
 485                 return 1;
 486         }
 487
 488         return error;
 489 }
 490
 491 /**
 492  * inode_go_dump - print information about an inode
 493  * @seq: The iterator
 494  * @ip: the inode
 495  * @fs_id_buf: file system id (may be empty)
 496  *
 497  */
 498
 499 static void inode_go_dump(struct seq_file *seq, struct gfs2_glock *gl,
 500                           const char *fs_id_buf)
 501 {
 502         struct gfs2_inode *ip = gl->gl_object;
 503         struct inode *inode = &ip->i_inode;
 504         unsigned long nrpages;
 505
 506         if (ip == NULL)
 507                 return;
 508
 509         xa_lock_irq(&inode->i_data.i_pages);
 510         nrpages = inode->i_data.nrpages;
 511         xa_unlock_irq(&inode->i_data.i_pages);
 512
 513         gfs2_print_dbg(seq, "%s I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu "
 514                        "p:%lu\n", fs_id_buf,
 515                   (unsigned long long)ip->i_no_formal_ino,
 516                   (unsigned long long)ip->i_no_addr,
 517                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
 518                   (unsigned int)ip->i_diskflags,
 519                   (unsigned long long)i_size_read(inode), nrpages);
 520 }
 521
 522 /**
 523  * freeze_go_sync - promote/demote the freeze glock
 524  * @gl: the glock
 525  * @state: the requested state
 526  * @flags:
 527  *
 528  */
 529
 530 static void freeze_go_sync(struct gfs2_glock *gl)
 531 {
 532         int error = 0;
 533         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 534
 535         if (gl->gl_state == LM_ST_SHARED &&
 536             test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 537                 atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
 538                 error = freeze_super(sdp->sd_vfs);
 539                 if (error) {
 540                         fs_info(sdp, "GFS2: couldn't freeze filesystem: %d\n",
 541                                 error);
 542                         gfs2_assert_withdraw(sdp, 0);
 543                 }
 544                 queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work);
 545                 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_FREEZE |
 546                                GFS2_LFC_FREEZE_GO_SYNC);
 547         }
 548 }
 549
 550 /**
 551  * freeze_go_xmote_bh - After promoting/demoting the freeze glock
 552  * @gl: the glock
 553  *
 554  */
 555
 556 static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
 557 {
 558         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 559         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
 560         struct gfs2_glock *j_gl = ip->i_gl;
 561         struct gfs2_log_header_host head;
 562         int error;
 563
 564         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 565                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 566
 567                 error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
 568                 if (error)
 569                         gfs2_consist(sdp);
 570                 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
 571                         gfs2_consist(sdp);
 572
 573                 /*  Initialize some head of the log stuff  */
 574                 if (!test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) {
 575                         sdp->sd_log_sequence = head.lh_sequence + 1;
 576                         gfs2_log_pointers_init(sdp, head.lh_blkno);
 577                 }
 578         }
 579         return 0;
 580 }
 581
 582 /**
 583  * trans_go_demote_ok
 584  * @gl: the glock
 585  *
 586  * Always returns 0
 587  */
 588
 589 static int freeze_go_demote_ok(const struct gfs2_glock *gl)
 590 {
 591         return 0;
 592 }
 593
 594 /**
 595  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
 596  * @gl: the glock
 597  *
 598  * gl_lockref.lock lock is held while calling this
 599  */
 600 static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
 601 {
 602         struct gfs2_inode *ip = gl->gl_object;
 603         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 604
 605         if (!remote || sb_rdonly(sdp->sd_vfs))
 606                 return;
 607
 608         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
 609             gl->gl_state == LM_ST_SHARED && ip) {
 610                 gl->gl_lockref.count++;
 611                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
 612                         gl->gl_lockref.count--;
 613         }
 614 }
 615
 616 const struct gfs2_glock_operations gfs2_meta_glops = {
 617         .go_type = LM_TYPE_META,
 618 };
 619
 620 const struct gfs2_glock_operations gfs2_inode_glops = {
 621         .go_sync = inode_go_sync,
 622         .go_inval = inode_go_inval,
 623         .go_demote_ok = inode_go_demote_ok,
 624         .go_lock = inode_go_lock,
 625         .go_dump = inode_go_dump,
 626         .go_type = LM_TYPE_INODE,
 627         .go_flags = GLOF_ASPACE | GLOF_LRU,
 628 };
 629
 630 const struct gfs2_glock_operations gfs2_rgrp_glops = {
 631         .go_sync = rgrp_go_sync,
 632         .go_inval = rgrp_go_inval,
 633         .go_lock = gfs2_rgrp_go_lock,
 634         .go_unlock = gfs2_rgrp_go_unlock,
 635         .go_dump = gfs2_rgrp_dump,
 636         .go_type = LM_TYPE_RGRP,
 637         .go_flags = GLOF_LVB,
 638 };
 639
 640 const struct gfs2_glock_operations gfs2_freeze_glops = {
 641         .go_sync = freeze_go_sync,
 642         .go_xmote_bh = freeze_go_xmote_bh,
 643         .go_demote_ok = freeze_go_demote_ok,
 644         .go_type = LM_TYPE_NONDISK,
 645 };
 646
 647 const struct gfs2_glock_operations gfs2_iopen_glops = {
 648         .go_type = LM_TYPE_IOPEN,
 649         .go_callback = iopen_go_callback,
 650         .go_flags = GLOF_LRU,
 651 };
 652
 653 const struct gfs2_glock_operations gfs2_flock_glops = {
 654         .go_type = LM_TYPE_FLOCK,
 655         .go_flags = GLOF_LRU,
 656 };
 657
 658 const struct gfs2_glock_operations gfs2_nondisk_glops = {
 659         .go_type = LM_TYPE_NONDISK,
 660 };
 661
 662 const struct gfs2_glock_operations gfs2_quota_glops = {
 663         .go_type = LM_TYPE_QUOTA,
 664         .go_flags = GLOF_LVB | GLOF_LRU,
 665 };
 666
 667 const struct gfs2_glock_operations gfs2_journal_glops = {
 668         .go_type = LM_TYPE_JOURNAL,
 669 };
 670
 671 const struct gfs2_glock_operations *gfs2_glops_list[] = {
 672         [LM_TYPE_META] = &gfs2_meta_glops,
 673         [LM_TYPE_INODE] = &gfs2_inode_glops,
 674         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
 675         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
 676         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
 677         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
 678         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
 679         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
 680 };
 681