]> Git Repo - linux.git/blob - fs/gfs2/glops.c
Bluetooth: btnxpuart: Enable Power Save feature on startup
[linux.git] / 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 extern struct workqueue_struct *gfs2_control_wq;
33
34 static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
35 {
36         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
37
38         fs_err(sdp,
39                "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page "
40                "state 0x%lx\n",
41                bh, (unsigned long long)bh->b_blocknr, bh->b_state,
42                bh->b_folio->mapping, bh->b_folio->flags);
43         fs_err(sdp, "AIL glock %u:%llu mapping %p\n",
44                gl->gl_name.ln_type, gl->gl_name.ln_number,
45                gfs2_glock2aspace(gl));
46         gfs2_lm(sdp, "AIL error\n");
47         gfs2_withdraw_delayed(sdp);
48 }
49
50 /**
51  * __gfs2_ail_flush - remove all buffers for a given lock from the AIL
52  * @gl: the glock
53  * @fsync: set when called from fsync (not all buffers will be clean)
54  * @nr_revokes: Number of buffers to revoke
55  *
56  * None of the buffers should be dirty, locked, or pinned.
57  */
58
59 static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync,
60                              unsigned int nr_revokes)
61 {
62         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
63         struct list_head *head = &gl->gl_ail_list;
64         struct gfs2_bufdata *bd, *tmp;
65         struct buffer_head *bh;
66         const unsigned long b_state = (1UL << BH_Dirty)|(1UL << BH_Pinned)|(1UL << BH_Lock);
67
68         gfs2_log_lock(sdp);
69         spin_lock(&sdp->sd_ail_lock);
70         list_for_each_entry_safe_reverse(bd, tmp, head, bd_ail_gl_list) {
71                 if (nr_revokes == 0)
72                         break;
73                 bh = bd->bd_bh;
74                 if (bh->b_state & b_state) {
75                         if (fsync)
76                                 continue;
77                         gfs2_ail_error(gl, bh);
78                 }
79                 gfs2_trans_add_revoke(sdp, bd);
80                 nr_revokes--;
81         }
82         GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count));
83         spin_unlock(&sdp->sd_ail_lock);
84         gfs2_log_unlock(sdp);
85
86         if (gfs2_withdrawing(sdp))
87                 gfs2_withdraw(sdp);
88 }
89
90
91 static int gfs2_ail_empty_gl(struct gfs2_glock *gl)
92 {
93         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
94         struct gfs2_trans tr;
95         unsigned int revokes;
96         int ret = 0;
97
98         revokes = atomic_read(&gl->gl_ail_count);
99
100         if (!revokes) {
101                 bool have_revokes;
102                 bool log_in_flight;
103
104                 /*
105                  * We have nothing on the ail, but there could be revokes on
106                  * the sdp revoke queue, in which case, we still want to flush
107                  * the log and wait for it to finish.
108                  *
109                  * If the sdp revoke list is empty too, we might still have an
110                  * io outstanding for writing revokes, so we should wait for
111                  * it before returning.
112                  *
113                  * If none of these conditions are true, our revokes are all
114                  * flushed and we can return.
115                  */
116                 gfs2_log_lock(sdp);
117                 have_revokes = !list_empty(&sdp->sd_log_revokes);
118                 log_in_flight = atomic_read(&sdp->sd_log_in_flight);
119                 gfs2_log_unlock(sdp);
120                 if (have_revokes)
121                         goto flush;
122                 if (log_in_flight)
123                         log_flush_wait(sdp);
124                 return 0;
125         }
126
127         memset(&tr, 0, sizeof(tr));
128         set_bit(TR_ONSTACK, &tr.tr_flags);
129         ret = __gfs2_trans_begin(&tr, sdp, 0, revokes, _RET_IP_);
130         if (ret) {
131                 fs_err(sdp, "Transaction error %d: Unable to write revokes.", ret);
132                 goto flush;
133         }
134         __gfs2_ail_flush(gl, 0, revokes);
135         gfs2_trans_end(sdp);
136
137 flush:
138         if (!ret)
139                 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
140                                 GFS2_LFC_AIL_EMPTY_GL);
141         return ret;
142 }
143
144 void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
145 {
146         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
147         unsigned int revokes = atomic_read(&gl->gl_ail_count);
148         int ret;
149
150         if (!revokes)
151                 return;
152
153         ret = gfs2_trans_begin(sdp, 0, revokes);
154         if (ret)
155                 return;
156         __gfs2_ail_flush(gl, fsync, revokes);
157         gfs2_trans_end(sdp);
158         gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
159                        GFS2_LFC_AIL_FLUSH);
160 }
161
162 /**
163  * gfs2_rgrp_metasync - sync out the metadata of a resource group
164  * @gl: the glock protecting the resource group
165  *
166  */
167
168 static int gfs2_rgrp_metasync(struct gfs2_glock *gl)
169 {
170         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
171         struct address_space *metamapping = &sdp->sd_aspace;
172         struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
173         const unsigned bsize = sdp->sd_sb.sb_bsize;
174         loff_t start = (rgd->rd_addr * bsize) & PAGE_MASK;
175         loff_t end = PAGE_ALIGN((rgd->rd_addr + rgd->rd_length) * bsize) - 1;
176         int error;
177
178         filemap_fdatawrite_range(metamapping, start, end);
179         error = filemap_fdatawait_range(metamapping, start, end);
180         WARN_ON_ONCE(error && !gfs2_withdrawing_or_withdrawn(sdp));
181         mapping_set_error(metamapping, error);
182         if (error)
183                 gfs2_io_error(sdp);
184         return error;
185 }
186
187 /**
188  * rgrp_go_sync - sync out the metadata for this glock
189  * @gl: the glock
190  *
191  * Called when demoting or unlocking an EX glock.  We must flush
192  * to disk all dirty buffers/pages relating to this glock, and must not
193  * return to caller to demote/unlock the glock until I/O is complete.
194  */
195
196 static int rgrp_go_sync(struct gfs2_glock *gl)
197 {
198         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
199         struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
200         int error;
201
202         if (!rgd || !test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
203                 return 0;
204         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
205
206         gfs2_log_flush(sdp, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
207                        GFS2_LFC_RGRP_GO_SYNC);
208         error = gfs2_rgrp_metasync(gl);
209         if (!error)
210                 error = gfs2_ail_empty_gl(gl);
211         gfs2_free_clones(rgd);
212         return error;
213 }
214
215 /**
216  * rgrp_go_inval - invalidate the metadata for this glock
217  * @gl: the glock
218  * @flags:
219  *
220  * We never used LM_ST_DEFERRED with resource groups, so that we
221  * should always see the metadata flag set here.
222  *
223  */
224
225 static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
226 {
227         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
228         struct address_space *mapping = &sdp->sd_aspace;
229         struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
230         const unsigned bsize = sdp->sd_sb.sb_bsize;
231         loff_t start, end;
232
233         if (!rgd)
234                 return;
235         start = (rgd->rd_addr * bsize) & PAGE_MASK;
236         end = PAGE_ALIGN((rgd->rd_addr + rgd->rd_length) * bsize) - 1;
237         gfs2_rgrp_brelse(rgd);
238         WARN_ON_ONCE(!(flags & DIO_METADATA));
239         truncate_inode_pages_range(mapping, start, end);
240 }
241
242 static void gfs2_rgrp_go_dump(struct seq_file *seq, const struct gfs2_glock *gl,
243                               const char *fs_id_buf)
244 {
245         struct gfs2_rgrpd *rgd = gl->gl_object;
246
247         if (rgd)
248                 gfs2_rgrp_dump(seq, rgd, fs_id_buf);
249 }
250
251 static struct gfs2_inode *gfs2_glock2inode(struct gfs2_glock *gl)
252 {
253         struct gfs2_inode *ip;
254
255         spin_lock(&gl->gl_lockref.lock);
256         ip = gl->gl_object;
257         if (ip)
258                 set_bit(GIF_GLOP_PENDING, &ip->i_flags);
259         spin_unlock(&gl->gl_lockref.lock);
260         return ip;
261 }
262
263 struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl)
264 {
265         struct gfs2_rgrpd *rgd;
266
267         spin_lock(&gl->gl_lockref.lock);
268         rgd = gl->gl_object;
269         spin_unlock(&gl->gl_lockref.lock);
270
271         return rgd;
272 }
273
274 static void gfs2_clear_glop_pending(struct gfs2_inode *ip)
275 {
276         if (!ip)
277                 return;
278
279         clear_bit_unlock(GIF_GLOP_PENDING, &ip->i_flags);
280         wake_up_bit(&ip->i_flags, GIF_GLOP_PENDING);
281 }
282
283 /**
284  * gfs2_inode_metasync - sync out the metadata of an inode
285  * @gl: the glock protecting the inode
286  *
287  */
288 int gfs2_inode_metasync(struct gfs2_glock *gl)
289 {
290         struct address_space *metamapping = gfs2_glock2aspace(gl);
291         int error;
292
293         filemap_fdatawrite(metamapping);
294         error = filemap_fdatawait(metamapping);
295         if (error)
296                 gfs2_io_error(gl->gl_name.ln_sbd);
297         return error;
298 }
299
300 /**
301  * inode_go_sync - Sync the dirty metadata of an inode
302  * @gl: the glock protecting the inode
303  *
304  */
305
306 static int inode_go_sync(struct gfs2_glock *gl)
307 {
308         struct gfs2_inode *ip = gfs2_glock2inode(gl);
309         int isreg = ip && S_ISREG(ip->i_inode.i_mode);
310         struct address_space *metamapping = gfs2_glock2aspace(gl);
311         int error = 0, ret;
312
313         if (isreg) {
314                 if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
315                         unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
316                 inode_dio_wait(&ip->i_inode);
317         }
318         if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
319                 goto out;
320
321         GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
322
323         gfs2_log_flush(gl->gl_name.ln_sbd, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
324                        GFS2_LFC_INODE_GO_SYNC);
325         filemap_fdatawrite(metamapping);
326         if (isreg) {
327                 struct address_space *mapping = ip->i_inode.i_mapping;
328                 filemap_fdatawrite(mapping);
329                 error = filemap_fdatawait(mapping);
330                 mapping_set_error(mapping, error);
331         }
332         ret = gfs2_inode_metasync(gl);
333         if (!error)
334                 error = ret;
335         ret = gfs2_ail_empty_gl(gl);
336         if (!error)
337                 error = ret;
338         /*
339          * Writeback of the data mapping may cause the dirty flag to be set
340          * so we have to clear it again here.
341          */
342         smp_mb__before_atomic();
343         clear_bit(GLF_DIRTY, &gl->gl_flags);
344
345 out:
346         gfs2_clear_glop_pending(ip);
347         return error;
348 }
349
350 /**
351  * inode_go_inval - prepare a inode glock to be released
352  * @gl: the glock
353  * @flags:
354  *
355  * Normally we invalidate everything, but if we are moving into
356  * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
357  * can keep hold of the metadata, since it won't have changed.
358  *
359  */
360
361 static void inode_go_inval(struct gfs2_glock *gl, int flags)
362 {
363         struct gfs2_inode *ip = gfs2_glock2inode(gl);
364
365         if (flags & DIO_METADATA) {
366                 struct address_space *mapping = gfs2_glock2aspace(gl);
367                 truncate_inode_pages(mapping, 0);
368                 if (ip) {
369                         set_bit(GLF_INSTANTIATE_NEEDED, &gl->gl_flags);
370                         forget_all_cached_acls(&ip->i_inode);
371                         security_inode_invalidate_secctx(&ip->i_inode);
372                         gfs2_dir_hash_inval(ip);
373                 }
374         }
375
376         if (ip == GFS2_I(gl->gl_name.ln_sbd->sd_rindex)) {
377                 gfs2_log_flush(gl->gl_name.ln_sbd, NULL,
378                                GFS2_LOG_HEAD_FLUSH_NORMAL |
379                                GFS2_LFC_INODE_GO_INVAL);
380                 gl->gl_name.ln_sbd->sd_rindex_uptodate = 0;
381         }
382         if (ip && S_ISREG(ip->i_inode.i_mode))
383                 truncate_inode_pages(ip->i_inode.i_mapping, 0);
384
385         gfs2_clear_glop_pending(ip);
386 }
387
388 /**
389  * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
390  * @gl: the glock
391  *
392  * Returns: 1 if it's ok
393  */
394
395 static int inode_go_demote_ok(const struct gfs2_glock *gl)
396 {
397         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
398
399         if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
400                 return 0;
401
402         return 1;
403 }
404
405 static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
406 {
407         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
408         const struct gfs2_dinode *str = buf;
409         struct timespec64 atime, iatime;
410         u16 height, depth;
411         umode_t mode = be32_to_cpu(str->di_mode);
412         struct inode *inode = &ip->i_inode;
413         bool is_new = inode->i_state & I_NEW;
414
415         if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr))) {
416                 gfs2_consist_inode(ip);
417                 return -EIO;
418         }
419         if (unlikely(!is_new && inode_wrong_type(inode, mode))) {
420                 gfs2_consist_inode(ip);
421                 return -EIO;
422         }
423         ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
424         inode->i_mode = mode;
425         if (is_new) {
426                 inode->i_rdev = 0;
427                 switch (mode & S_IFMT) {
428                 case S_IFBLK:
429                 case S_IFCHR:
430                         inode->i_rdev = MKDEV(be32_to_cpu(str->di_major),
431                                               be32_to_cpu(str->di_minor));
432                         break;
433                 }
434         }
435
436         i_uid_write(inode, be32_to_cpu(str->di_uid));
437         i_gid_write(inode, be32_to_cpu(str->di_gid));
438         set_nlink(inode, be32_to_cpu(str->di_nlink));
439         i_size_write(inode, be64_to_cpu(str->di_size));
440         gfs2_set_inode_blocks(inode, be64_to_cpu(str->di_blocks));
441         atime.tv_sec = be64_to_cpu(str->di_atime);
442         atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
443         iatime = inode_get_atime(inode);
444         if (timespec64_compare(&iatime, &atime) < 0)
445                 inode_set_atime_to_ts(inode, atime);
446         inode_set_mtime(inode, be64_to_cpu(str->di_mtime),
447                         be32_to_cpu(str->di_mtime_nsec));
448         inode_set_ctime(inode, be64_to_cpu(str->di_ctime),
449                         be32_to_cpu(str->di_ctime_nsec));
450
451         ip->i_goal = be64_to_cpu(str->di_goal_meta);
452         ip->i_generation = be64_to_cpu(str->di_generation);
453
454         ip->i_diskflags = be32_to_cpu(str->di_flags);
455         ip->i_eattr = be64_to_cpu(str->di_eattr);
456         /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
457         gfs2_set_inode_flags(inode);
458         height = be16_to_cpu(str->di_height);
459         if (unlikely(height > sdp->sd_max_height)) {
460                 gfs2_consist_inode(ip);
461                 return -EIO;
462         }
463         ip->i_height = (u8)height;
464
465         depth = be16_to_cpu(str->di_depth);
466         if (unlikely(depth > GFS2_DIR_MAX_DEPTH)) {
467                 gfs2_consist_inode(ip);
468                 return -EIO;
469         }
470         ip->i_depth = (u8)depth;
471         ip->i_entries = be32_to_cpu(str->di_entries);
472
473         if (gfs2_is_stuffed(ip) && inode->i_size > gfs2_max_stuffed_size(ip)) {
474                 gfs2_consist_inode(ip);
475                 return -EIO;
476         }
477         if (S_ISREG(inode->i_mode))
478                 gfs2_set_aops(inode);
479
480         return 0;
481 }
482
483 /**
484  * gfs2_inode_refresh - Refresh the incore copy of the dinode
485  * @ip: The GFS2 inode
486  *
487  * Returns: errno
488  */
489
490 int gfs2_inode_refresh(struct gfs2_inode *ip)
491 {
492         struct buffer_head *dibh;
493         int error;
494
495         error = gfs2_meta_inode_buffer(ip, &dibh);
496         if (error)
497                 return error;
498
499         error = gfs2_dinode_in(ip, dibh->b_data);
500         brelse(dibh);
501         return error;
502 }
503
504 /**
505  * inode_go_instantiate - read in an inode if necessary
506  * @gl: The glock
507  *
508  * Returns: errno
509  */
510
511 static int inode_go_instantiate(struct gfs2_glock *gl)
512 {
513         struct gfs2_inode *ip = gl->gl_object;
514
515         if (!ip) /* no inode to populate - read it in later */
516                 return 0;
517
518         return gfs2_inode_refresh(ip);
519 }
520
521 static int inode_go_held(struct gfs2_holder *gh)
522 {
523         struct gfs2_glock *gl = gh->gh_gl;
524         struct gfs2_inode *ip = gl->gl_object;
525         int error = 0;
526
527         if (!ip) /* no inode to populate - read it in later */
528                 return 0;
529
530         if (gh->gh_state != LM_ST_DEFERRED)
531                 inode_dio_wait(&ip->i_inode);
532
533         if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
534             (gl->gl_state == LM_ST_EXCLUSIVE) &&
535             (gh->gh_state == LM_ST_EXCLUSIVE))
536                 error = gfs2_truncatei_resume(ip);
537
538         return error;
539 }
540
541 /**
542  * inode_go_dump - print information about an inode
543  * @seq: The iterator
544  * @gl: The glock
545  * @fs_id_buf: file system id (may be empty)
546  *
547  */
548
549 static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl,
550                           const char *fs_id_buf)
551 {
552         struct gfs2_inode *ip = gl->gl_object;
553         const struct inode *inode = &ip->i_inode;
554
555         if (ip == NULL)
556                 return;
557
558         gfs2_print_dbg(seq, "%s I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu "
559                        "p:%lu\n", fs_id_buf,
560                   (unsigned long long)ip->i_no_formal_ino,
561                   (unsigned long long)ip->i_no_addr,
562                   IF2DT(inode->i_mode), ip->i_flags,
563                   (unsigned int)ip->i_diskflags,
564                   (unsigned long long)i_size_read(inode),
565                   inode->i_data.nrpages);
566 }
567
568 /**
569  * freeze_go_callback - A cluster node is requesting a freeze
570  * @gl: the glock
571  * @remote: true if this came from a different cluster node
572  */
573
574 static void freeze_go_callback(struct gfs2_glock *gl, bool remote)
575 {
576         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
577         struct super_block *sb = sdp->sd_vfs;
578
579         if (!remote ||
580             (gl->gl_state != LM_ST_SHARED &&
581              gl->gl_state != LM_ST_UNLOCKED) ||
582             gl->gl_demote_state != LM_ST_UNLOCKED)
583                 return;
584
585         /*
586          * Try to get an active super block reference to prevent racing with
587          * unmount (see super_trylock_shared()).  But note that unmount isn't
588          * the only place where a write lock on s_umount is taken, and we can
589          * fail here because of things like remount as well.
590          */
591         if (down_read_trylock(&sb->s_umount)) {
592                 atomic_inc(&sb->s_active);
593                 up_read(&sb->s_umount);
594                 if (!queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work))
595                         deactivate_super(sb);
596         }
597 }
598
599 /**
600  * freeze_go_xmote_bh - After promoting/demoting the freeze glock
601  * @gl: the glock
602  */
603 static int freeze_go_xmote_bh(struct gfs2_glock *gl)
604 {
605         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
606         struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
607         struct gfs2_glock *j_gl = ip->i_gl;
608         struct gfs2_log_header_host head;
609         int error;
610
611         if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
612                 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
613
614                 error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
615                 if (gfs2_assert_withdraw_delayed(sdp, !error))
616                         return error;
617                 if (gfs2_assert_withdraw_delayed(sdp, head.lh_flags &
618                                                  GFS2_LOG_HEAD_UNMOUNT))
619                         return -EIO;
620                 sdp->sd_log_sequence = head.lh_sequence + 1;
621                 gfs2_log_pointers_init(sdp, head.lh_blkno);
622         }
623         return 0;
624 }
625
626 /**
627  * iopen_go_callback - schedule the dcache entry for the inode to be deleted
628  * @gl: the glock
629  * @remote: true if this came from a different cluster node
630  *
631  * gl_lockref.lock lock is held while calling this
632  */
633 static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
634 {
635         struct gfs2_inode *ip = gl->gl_object;
636         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
637
638         if (!remote || sb_rdonly(sdp->sd_vfs) ||
639             test_bit(SDF_KILL, &sdp->sd_flags))
640                 return;
641
642         if (gl->gl_demote_state == LM_ST_UNLOCKED &&
643             gl->gl_state == LM_ST_SHARED && ip) {
644                 gl->gl_lockref.count++;
645                 if (!gfs2_queue_try_to_evict(gl))
646                         gl->gl_lockref.count--;
647         }
648 }
649
650 /**
651  * inode_go_free - wake up anyone waiting for dlm's unlock ast to free it
652  * @gl: glock being freed
653  *
654  * For now, this is only used for the journal inode glock. In withdraw
655  * situations, we need to wait for the glock to be freed so that we know
656  * other nodes may proceed with recovery / journal replay.
657  */
658 static void inode_go_free(struct gfs2_glock *gl)
659 {
660         /* Note that we cannot reference gl_object because it's already set
661          * to NULL by this point in its lifecycle. */
662         if (!test_bit(GLF_FREEING, &gl->gl_flags))
663                 return;
664         clear_bit_unlock(GLF_FREEING, &gl->gl_flags);
665         wake_up_bit(&gl->gl_flags, GLF_FREEING);
666 }
667
668 /**
669  * nondisk_go_callback - used to signal when a node did a withdraw
670  * @gl: the nondisk glock
671  * @remote: true if this came from a different cluster node
672  *
673  */
674 static void nondisk_go_callback(struct gfs2_glock *gl, bool remote)
675 {
676         struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
677
678         /* Ignore the callback unless it's from another node, and it's the
679            live lock. */
680         if (!remote || gl->gl_name.ln_number != GFS2_LIVE_LOCK)
681                 return;
682
683         /* First order of business is to cancel the demote request. We don't
684          * really want to demote a nondisk glock. At best it's just to inform
685          * us of another node's withdraw. We'll keep it in SH mode. */
686         clear_bit(GLF_DEMOTE, &gl->gl_flags);
687         clear_bit(GLF_PENDING_DEMOTE, &gl->gl_flags);
688
689         /* Ignore the unlock if we're withdrawn, unmounting, or in recovery. */
690         if (test_bit(SDF_NORECOVERY, &sdp->sd_flags) ||
691             test_bit(SDF_WITHDRAWN, &sdp->sd_flags) ||
692             test_bit(SDF_REMOTE_WITHDRAW, &sdp->sd_flags))
693                 return;
694
695         /* We only care when a node wants us to unlock, because that means
696          * they want a journal recovered. */
697         if (gl->gl_demote_state != LM_ST_UNLOCKED)
698                 return;
699
700         if (sdp->sd_args.ar_spectator) {
701                 fs_warn(sdp, "Spectator node cannot recover journals.\n");
702                 return;
703         }
704
705         fs_warn(sdp, "Some node has withdrawn; checking for recovery.\n");
706         set_bit(SDF_REMOTE_WITHDRAW, &sdp->sd_flags);
707         /*
708          * We can't call remote_withdraw directly here or gfs2_recover_journal
709          * because this is called from the glock unlock function and the
710          * remote_withdraw needs to enqueue and dequeue the same "live" glock
711          * we were called from. So we queue it to the control work queue in
712          * lock_dlm.
713          */
714         queue_delayed_work(gfs2_control_wq, &sdp->sd_control_work, 0);
715 }
716
717 const struct gfs2_glock_operations gfs2_meta_glops = {
718         .go_type = LM_TYPE_META,
719         .go_flags = GLOF_NONDISK,
720 };
721
722 const struct gfs2_glock_operations gfs2_inode_glops = {
723         .go_sync = inode_go_sync,
724         .go_inval = inode_go_inval,
725         .go_demote_ok = inode_go_demote_ok,
726         .go_instantiate = inode_go_instantiate,
727         .go_held = inode_go_held,
728         .go_dump = inode_go_dump,
729         .go_type = LM_TYPE_INODE,
730         .go_flags = GLOF_ASPACE | GLOF_LRU | GLOF_LVB,
731         .go_free = inode_go_free,
732 };
733
734 const struct gfs2_glock_operations gfs2_rgrp_glops = {
735         .go_sync = rgrp_go_sync,
736         .go_inval = rgrp_go_inval,
737         .go_instantiate = gfs2_rgrp_go_instantiate,
738         .go_dump = gfs2_rgrp_go_dump,
739         .go_type = LM_TYPE_RGRP,
740         .go_flags = GLOF_LVB,
741 };
742
743 const struct gfs2_glock_operations gfs2_freeze_glops = {
744         .go_xmote_bh = freeze_go_xmote_bh,
745         .go_callback = freeze_go_callback,
746         .go_type = LM_TYPE_NONDISK,
747         .go_flags = GLOF_NONDISK,
748 };
749
750 const struct gfs2_glock_operations gfs2_iopen_glops = {
751         .go_type = LM_TYPE_IOPEN,
752         .go_callback = iopen_go_callback,
753         .go_dump = inode_go_dump,
754         .go_flags = GLOF_LRU | GLOF_NONDISK,
755         .go_subclass = 1,
756 };
757
758 const struct gfs2_glock_operations gfs2_flock_glops = {
759         .go_type = LM_TYPE_FLOCK,
760         .go_flags = GLOF_LRU | GLOF_NONDISK,
761 };
762
763 const struct gfs2_glock_operations gfs2_nondisk_glops = {
764         .go_type = LM_TYPE_NONDISK,
765         .go_flags = GLOF_NONDISK,
766         .go_callback = nondisk_go_callback,
767 };
768
769 const struct gfs2_glock_operations gfs2_quota_glops = {
770         .go_type = LM_TYPE_QUOTA,
771         .go_flags = GLOF_LVB | GLOF_LRU | GLOF_NONDISK,
772 };
773
774 const struct gfs2_glock_operations gfs2_journal_glops = {
775         .go_type = LM_TYPE_JOURNAL,
776         .go_flags = GLOF_NONDISK,
777 };
778
779 const struct gfs2_glock_operations *gfs2_glops_list[] = {
780         [LM_TYPE_META] = &gfs2_meta_glops,
781         [LM_TYPE_INODE] = &gfs2_inode_glops,
782         [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
783         [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
784         [LM_TYPE_FLOCK] = &gfs2_flock_glops,
785         [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
786         [LM_TYPE_QUOTA] = &gfs2_quota_glops,
787         [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
788 };
789
This page took 0.076729 seconds and 4 git commands to generate.