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Linux/fs/gfs2/glops.c

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  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         struct gfs2_holder *gh;
290 
291         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
292                 return 0;
293 
294         if (!list_empty(&gl->gl_holders)) {
295                 gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
296                 if (gh->gh_list.next != &gl->gl_holders)
297                         return 0;
298         }
299 
300         return 1;
301 }
302 
303 /**
304  * gfs2_set_nlink - Set the inode's link count based on on-disk info
305  * @inode: The inode in question
306  * @nlink: The link count
307  *
308  * If the link count has hit zero, it must never be raised, whatever the
309  * on-disk inode might say. When new struct inodes are created the link
310  * count is set to 1, so that we can safely use this test even when reading
311  * in on disk information for the first time.
312  */
313 
314 static void gfs2_set_nlink(struct inode *inode, u32 nlink)
315 {
316         /*
317          * We will need to review setting the nlink count here in the
318          * light of the forthcoming ro bind mount work. This is a reminder
319          * to do that.
320          */
321         if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
322                 if (nlink == 0)
323                         clear_nlink(inode);
324                 else
325                         set_nlink(inode, nlink);
326         }
327 }
328 
329 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
330 {
331         const struct gfs2_dinode *str = buf;
332         struct timespec atime;
333         u16 height, depth;
334 
335         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
336                 goto corrupt;
337         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
338         ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
339         ip->i_inode.i_rdev = 0;
340         switch (ip->i_inode.i_mode & S_IFMT) {
341         case S_IFBLK:
342         case S_IFCHR:
343                 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
344                                            be32_to_cpu(str->di_minor));
345                 break;
346         };
347 
348         i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid));
349         i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid));
350         gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
351         i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
352         gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
353         atime.tv_sec = be64_to_cpu(str->di_atime);
354         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
355         if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
356                 ip->i_inode.i_atime = atime;
357         ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
358         ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
359         ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
360         ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
361 
362         ip->i_goal = be64_to_cpu(str->di_goal_meta);
363         ip->i_generation = be64_to_cpu(str->di_generation);
364 
365         ip->i_diskflags = be32_to_cpu(str->di_flags);
366         ip->i_eattr = be64_to_cpu(str->di_eattr);
367         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
368         gfs2_set_inode_flags(&ip->i_inode);
369         height = be16_to_cpu(str->di_height);
370         if (unlikely(height > GFS2_MAX_META_HEIGHT))
371                 goto corrupt;
372         ip->i_height = (u8)height;
373 
374         depth = be16_to_cpu(str->di_depth);
375         if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
376                 goto corrupt;
377         ip->i_depth = (u8)depth;
378         ip->i_entries = be32_to_cpu(str->di_entries);
379 
380         if (S_ISREG(ip->i_inode.i_mode))
381                 gfs2_set_aops(&ip->i_inode);
382 
383         return 0;
384 corrupt:
385         gfs2_consist_inode(ip);
386         return -EIO;
387 }
388 
389 /**
390  * gfs2_inode_refresh - Refresh the incore copy of the dinode
391  * @ip: The GFS2 inode
392  *
393  * Returns: errno
394  */
395 
396 int gfs2_inode_refresh(struct gfs2_inode *ip)
397 {
398         struct buffer_head *dibh;
399         int error;
400 
401         error = gfs2_meta_inode_buffer(ip, &dibh);
402         if (error)
403                 return error;
404 
405         error = gfs2_dinode_in(ip, dibh->b_data);
406         brelse(dibh);
407         clear_bit(GIF_INVALID, &ip->i_flags);
408 
409         return error;
410 }
411 
412 /**
413  * inode_go_lock - operation done after an inode lock is locked by a process
414  * @gl: the glock
415  * @flags:
416  *
417  * Returns: errno
418  */
419 
420 static int inode_go_lock(struct gfs2_holder *gh)
421 {
422         struct gfs2_glock *gl = gh->gh_gl;
423         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
424         struct gfs2_inode *ip = gl->gl_object;
425         int error = 0;
426 
427         if (!ip || (gh->gh_flags & GL_SKIP))
428                 return 0;
429 
430         if (test_bit(GIF_INVALID, &ip->i_flags)) {
431                 error = gfs2_inode_refresh(ip);
432                 if (error)
433                         return error;
434         }
435 
436         if (gh->gh_state != LM_ST_DEFERRED)
437                 inode_dio_wait(&ip->i_inode);
438 
439         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
440             (gl->gl_state == LM_ST_EXCLUSIVE) &&
441             (gh->gh_state == LM_ST_EXCLUSIVE)) {
442                 spin_lock(&sdp->sd_trunc_lock);
443                 if (list_empty(&ip->i_trunc_list))
444                         list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
445                 spin_unlock(&sdp->sd_trunc_lock);
446                 wake_up(&sdp->sd_quota_wait);
447                 return 1;
448         }
449 
450         return error;
451 }
452 
453 /**
454  * inode_go_dump - print information about an inode
455  * @seq: The iterator
456  * @ip: the inode
457  *
458  */
459 
460 static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
461 {
462         const struct gfs2_inode *ip = gl->gl_object;
463         if (ip == NULL)
464                 return;
465         gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
466                   (unsigned long long)ip->i_no_formal_ino,
467                   (unsigned long long)ip->i_no_addr,
468                   IF2DT(ip->i_inode.i_mode), ip->i_flags,
469                   (unsigned int)ip->i_diskflags,
470                   (unsigned long long)i_size_read(&ip->i_inode));
471 }
472 
473 /**
474  * freeze_go_sync - promote/demote the freeze glock
475  * @gl: the glock
476  * @state: the requested state
477  * @flags:
478  *
479  */
480 
481 static void freeze_go_sync(struct gfs2_glock *gl)
482 {
483         int error = 0;
484         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
485 
486         if (gl->gl_state == LM_ST_SHARED &&
487             test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
488                 atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
489                 error = freeze_super(sdp->sd_vfs);
490                 if (error) {
491                         printk(KERN_INFO "GFS2: couldn't freeze filesystem: %d\n", error);
492                         gfs2_assert_withdraw(sdp, 0);
493                 }
494                 queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work);
495                 gfs2_log_flush(sdp, NULL, FREEZE_FLUSH);
496         }
497 }
498 
499 /**
500  * freeze_go_xmote_bh - After promoting/demoting the freeze glock
501  * @gl: the glock
502  *
503  */
504 
505 static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
506 {
507         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
508         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
509         struct gfs2_glock *j_gl = ip->i_gl;
510         struct gfs2_log_header_host head;
511         int error;
512 
513         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
514                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
515 
516                 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
517                 if (error)
518                         gfs2_consist(sdp);
519                 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
520                         gfs2_consist(sdp);
521 
522                 /*  Initialize some head of the log stuff  */
523                 if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
524                         sdp->sd_log_sequence = head.lh_sequence + 1;
525                         gfs2_log_pointers_init(sdp, head.lh_blkno);
526                 }
527         }
528         return 0;
529 }
530 
531 /**
532  * trans_go_demote_ok
533  * @gl: the glock
534  *
535  * Always returns 0
536  */
537 
538 static int freeze_go_demote_ok(const struct gfs2_glock *gl)
539 {
540         return 0;
541 }
542 
543 /**
544  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
545  * @gl: the glock
546  *
547  * gl_lockref.lock lock is held while calling this
548  */
549 static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
550 {
551         struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object;
552         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
553 
554         if (!remote || (sdp->sd_vfs->s_flags & MS_RDONLY))
555                 return;
556 
557         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
558             gl->gl_state == LM_ST_SHARED && ip) {
559                 gl->gl_lockref.count++;
560                 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
561                         gl->gl_lockref.count--;
562         }
563 }
564 
565 const struct gfs2_glock_operations gfs2_meta_glops = {
566         .go_type = LM_TYPE_META,
567 };
568 
569 const struct gfs2_glock_operations gfs2_inode_glops = {
570         .go_sync = inode_go_sync,
571         .go_inval = inode_go_inval,
572         .go_demote_ok = inode_go_demote_ok,
573         .go_lock = inode_go_lock,
574         .go_dump = inode_go_dump,
575         .go_type = LM_TYPE_INODE,
576         .go_flags = GLOF_ASPACE | GLOF_LRU,
577 };
578 
579 const struct gfs2_glock_operations gfs2_rgrp_glops = {
580         .go_sync = rgrp_go_sync,
581         .go_inval = rgrp_go_inval,
582         .go_lock = gfs2_rgrp_go_lock,
583         .go_unlock = gfs2_rgrp_go_unlock,
584         .go_dump = gfs2_rgrp_dump,
585         .go_type = LM_TYPE_RGRP,
586         .go_flags = GLOF_LVB,
587 };
588 
589 const struct gfs2_glock_operations gfs2_freeze_glops = {
590         .go_sync = freeze_go_sync,
591         .go_xmote_bh = freeze_go_xmote_bh,
592         .go_demote_ok = freeze_go_demote_ok,
593         .go_type = LM_TYPE_NONDISK,
594 };
595 
596 const struct gfs2_glock_operations gfs2_iopen_glops = {
597         .go_type = LM_TYPE_IOPEN,
598         .go_callback = iopen_go_callback,
599         .go_flags = GLOF_LRU,
600 };
601 
602 const struct gfs2_glock_operations gfs2_flock_glops = {
603         .go_type = LM_TYPE_FLOCK,
604         .go_flags = GLOF_LRU,
605 };
606 
607 const struct gfs2_glock_operations gfs2_nondisk_glops = {
608         .go_type = LM_TYPE_NONDISK,
609 };
610 
611 const struct gfs2_glock_operations gfs2_quota_glops = {
612         .go_type = LM_TYPE_QUOTA,
613         .go_flags = GLOF_LVB | GLOF_LRU,
614 };
615 
616 const struct gfs2_glock_operations gfs2_journal_glops = {
617         .go_type = LM_TYPE_JOURNAL,
618 };
619 
620 const struct gfs2_glock_operations *gfs2_glops_list[] = {
621         [LM_TYPE_META] = &gfs2_meta_glops,
622         [LM_TYPE_INODE] = &gfs2_inode_glops,
623         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
624         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
625         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
626         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
627         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
628         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
629 };
630 
631 

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