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
30struct workqueue_struct *gfs2_freeze_wq;
31
32extern struct workqueue_struct *gfs2_control_wq;
33
34static 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, fmt: "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
59static 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(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(lock: &sdp->sd_ail_lock);
84 gfs2_log_unlock(sdp);
85}
86
87
88static int gfs2_ail_empty_gl(struct gfs2_glock *gl)
89{
90 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
91 struct gfs2_trans tr;
92 unsigned int revokes;
93 int ret = 0;
94
95 revokes = atomic_read(v: &gl->gl_ail_count);
96
97 if (!revokes) {
98 bool have_revokes;
99 bool log_in_flight;
100
101 /*
102 * We have nothing on the ail, but there could be revokes on
103 * the sdp revoke queue, in which case, we still want to flush
104 * the log and wait for it to finish.
105 *
106 * If the sdp revoke list is empty too, we might still have an
107 * io outstanding for writing revokes, so we should wait for
108 * it before returning.
109 *
110 * If none of these conditions are true, our revokes are all
111 * flushed and we can return.
112 */
113 gfs2_log_lock(sdp);
114 have_revokes = !list_empty(head: &sdp->sd_log_revokes);
115 log_in_flight = atomic_read(v: &sdp->sd_log_in_flight);
116 gfs2_log_unlock(sdp);
117 if (have_revokes)
118 goto flush;
119 if (log_in_flight)
120 log_flush_wait(sdp);
121 return 0;
122 }
123
124 memset(&tr, 0, sizeof(tr));
125 set_bit(nr: TR_ONSTACK, addr: &tr.tr_flags);
126 ret = __gfs2_trans_begin(tr: &tr, sdp, blocks: 0, revokes, _RET_IP_);
127 if (ret) {
128 fs_err(sdp, "Transaction error %d: Unable to write revokes.", ret);
129 goto flush;
130 }
131 __gfs2_ail_flush(gl, fsync: 0, nr_revokes: revokes);
132 gfs2_trans_end(sdp);
133
134flush:
135 if (!ret)
136 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
137 GFS2_LFC_AIL_EMPTY_GL);
138 return ret;
139}
140
141void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
142{
143 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
144 unsigned int revokes = atomic_read(v: &gl->gl_ail_count);
145 int ret;
146
147 if (!revokes)
148 return;
149
150 ret = gfs2_trans_begin(sdp, blocks: 0, revokes);
151 if (ret)
152 return;
153 __gfs2_ail_flush(gl, fsync, nr_revokes: revokes);
154 gfs2_trans_end(sdp);
155 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
156 GFS2_LFC_AIL_FLUSH);
157}
158
159/**
160 * gfs2_rgrp_metasync - sync out the metadata of a resource group
161 * @gl: the glock protecting the resource group
162 *
163 */
164
165static int gfs2_rgrp_metasync(struct gfs2_glock *gl)
166{
167 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
168 struct address_space *metamapping = &sdp->sd_aspace;
169 struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
170 const unsigned bsize = sdp->sd_sb.sb_bsize;
171 loff_t start = (rgd->rd_addr * bsize) & PAGE_MASK;
172 loff_t end = PAGE_ALIGN((rgd->rd_addr + rgd->rd_length) * bsize) - 1;
173 int error;
174
175 filemap_fdatawrite_range(mapping: metamapping, start, end);
176 error = filemap_fdatawait_range(metamapping, lstart: start, lend: end);
177 WARN_ON_ONCE(error && !gfs2_withdrawing_or_withdrawn(sdp));
178 mapping_set_error(mapping: metamapping, error);
179 if (error)
180 gfs2_io_error(sdp);
181 return error;
182}
183
184/**
185 * rgrp_go_sync - sync out the metadata for this glock
186 * @gl: the glock
187 *
188 * Called when demoting or unlocking an EX glock. We must flush
189 * to disk all dirty buffers/pages relating to this glock, and must not
190 * return to caller to demote/unlock the glock until I/O is complete.
191 */
192
193static int rgrp_go_sync(struct gfs2_glock *gl)
194{
195 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
196 struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
197 int error;
198
199 if (!rgd || !test_and_clear_bit(nr: GLF_DIRTY, addr: &gl->gl_flags))
200 return 0;
201 GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
202
203 gfs2_log_flush(sdp, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
204 GFS2_LFC_RGRP_GO_SYNC);
205 error = gfs2_rgrp_metasync(gl);
206 if (!error)
207 error = gfs2_ail_empty_gl(gl);
208 gfs2_free_clones(rgd);
209 return error;
210}
211
212/**
213 * rgrp_go_inval - invalidate the metadata for this glock
214 * @gl: the glock
215 * @flags:
216 *
217 * We never used LM_ST_DEFERRED with resource groups, so that we
218 * should always see the metadata flag set here.
219 *
220 */
221
222static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
223{
224 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
225 struct address_space *mapping = &sdp->sd_aspace;
226 struct gfs2_rgrpd *rgd = gfs2_glock2rgrp(gl);
227 const unsigned bsize = sdp->sd_sb.sb_bsize;
228 loff_t start, end;
229
230 if (!rgd)
231 return;
232 start = (rgd->rd_addr * bsize) & PAGE_MASK;
233 end = PAGE_ALIGN((rgd->rd_addr + rgd->rd_length) * bsize) - 1;
234 gfs2_rgrp_brelse(rgd);
235 WARN_ON_ONCE(!(flags & DIO_METADATA));
236 truncate_inode_pages_range(mapping, lstart: start, lend: end);
237}
238
239static void gfs2_rgrp_go_dump(struct seq_file *seq, const struct gfs2_glock *gl,
240 const char *fs_id_buf)
241{
242 struct gfs2_rgrpd *rgd = gl->gl_object;
243
244 if (rgd)
245 gfs2_rgrp_dump(seq, rgd, fs_id_buf);
246}
247
248static struct gfs2_inode *gfs2_glock2inode(struct gfs2_glock *gl)
249{
250 struct gfs2_inode *ip;
251
252 spin_lock(lock: &gl->gl_lockref.lock);
253 ip = gl->gl_object;
254 if (ip)
255 set_bit(nr: GIF_GLOP_PENDING, addr: &ip->i_flags);
256 spin_unlock(lock: &gl->gl_lockref.lock);
257 return ip;
258}
259
260struct gfs2_rgrpd *gfs2_glock2rgrp(struct gfs2_glock *gl)
261{
262 struct gfs2_rgrpd *rgd;
263
264 spin_lock(lock: &gl->gl_lockref.lock);
265 rgd = gl->gl_object;
266 spin_unlock(lock: &gl->gl_lockref.lock);
267
268 return rgd;
269}
270
271static void gfs2_clear_glop_pending(struct gfs2_inode *ip)
272{
273 if (!ip)
274 return;
275
276 clear_bit_unlock(nr: GIF_GLOP_PENDING, addr: &ip->i_flags);
277 wake_up_bit(word: &ip->i_flags, bit: GIF_GLOP_PENDING);
278}
279
280/**
281 * gfs2_inode_metasync - sync out the metadata of an inode
282 * @gl: the glock protecting the inode
283 *
284 */
285int gfs2_inode_metasync(struct gfs2_glock *gl)
286{
287 struct address_space *metamapping = gfs2_glock2aspace(gl);
288 int error;
289
290 filemap_fdatawrite(metamapping);
291 error = filemap_fdatawait(mapping: metamapping);
292 if (error)
293 gfs2_io_error(gl->gl_name.ln_sbd);
294 return error;
295}
296
297/**
298 * inode_go_sync - Sync the dirty metadata of an inode
299 * @gl: the glock protecting the inode
300 *
301 */
302
303static int inode_go_sync(struct gfs2_glock *gl)
304{
305 struct gfs2_inode *ip = gfs2_glock2inode(gl);
306 int isreg = ip && S_ISREG(ip->i_inode.i_mode);
307 struct address_space *metamapping = gfs2_glock2aspace(gl);
308 int error = 0, ret;
309
310 if (isreg) {
311 if (test_and_clear_bit(nr: GIF_SW_PAGED, addr: &ip->i_flags))
312 unmap_shared_mapping_range(mapping: ip->i_inode.i_mapping, holebegin: 0, holelen: 0);
313 inode_dio_wait(inode: &ip->i_inode);
314 }
315 if (!test_and_clear_bit(nr: GLF_DIRTY, addr: &gl->gl_flags))
316 goto out;
317
318 GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE);
319
320 gfs2_log_flush(sdp: gl->gl_name.ln_sbd, gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
321 GFS2_LFC_INODE_GO_SYNC);
322 filemap_fdatawrite(metamapping);
323 if (isreg) {
324 struct address_space *mapping = ip->i_inode.i_mapping;
325 filemap_fdatawrite(mapping);
326 error = filemap_fdatawait(mapping);
327 mapping_set_error(mapping, error);
328 }
329 ret = gfs2_inode_metasync(gl);
330 if (!error)
331 error = ret;
332 ret = gfs2_ail_empty_gl(gl);
333 if (!error)
334 error = ret;
335 /*
336 * Writeback of the data mapping may cause the dirty flag to be set
337 * so we have to clear it again here.
338 */
339 smp_mb__before_atomic();
340 clear_bit(nr: GLF_DIRTY, addr: &gl->gl_flags);
341
342out:
343 gfs2_clear_glop_pending(ip);
344 return error;
345}
346
347/**
348 * inode_go_inval - prepare a inode glock to be released
349 * @gl: the glock
350 * @flags:
351 *
352 * Normally we invalidate everything, but if we are moving into
353 * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
354 * can keep hold of the metadata, since it won't have changed.
355 *
356 */
357
358static void inode_go_inval(struct gfs2_glock *gl, int flags)
359{
360 struct gfs2_inode *ip = gfs2_glock2inode(gl);
361
362 if (flags & DIO_METADATA) {
363 struct address_space *mapping = gfs2_glock2aspace(gl);
364 truncate_inode_pages(mapping, 0);
365 if (ip) {
366 set_bit(nr: GLF_INSTANTIATE_NEEDED, addr: &gl->gl_flags);
367 forget_all_cached_acls(inode: &ip->i_inode);
368 security_inode_invalidate_secctx(inode: &ip->i_inode);
369 gfs2_dir_hash_inval(ip);
370 }
371 }
372
373 if (ip == GFS2_I(inode: gl->gl_name.ln_sbd->sd_rindex)) {
374 gfs2_log_flush(sdp: gl->gl_name.ln_sbd, NULL,
375 GFS2_LOG_HEAD_FLUSH_NORMAL |
376 GFS2_LFC_INODE_GO_INVAL);
377 gl->gl_name.ln_sbd->sd_rindex_uptodate = 0;
378 }
379 if (ip && S_ISREG(ip->i_inode.i_mode))
380 truncate_inode_pages(ip->i_inode.i_mapping, 0);
381
382 gfs2_clear_glop_pending(ip);
383}
384
385/**
386 * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
387 * @gl: the glock
388 *
389 * Returns: 1 if it's ok
390 */
391
392static int inode_go_demote_ok(const struct gfs2_glock *gl)
393{
394 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
395
396 if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
397 return 0;
398
399 return 1;
400}
401
402static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
403{
404 struct gfs2_sbd *sdp = GFS2_SB(inode: &ip->i_inode);
405 const struct gfs2_dinode *str = buf;
406 struct timespec64 atime, iatime;
407 u16 height, depth;
408 umode_t mode = be32_to_cpu(str->di_mode);
409 struct inode *inode = &ip->i_inode;
410 bool is_new = inode->i_state & I_NEW;
411
412 if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
413 goto corrupt;
414 if (unlikely(!is_new && inode_wrong_type(inode, mode)))
415 goto corrupt;
416 ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
417 inode->i_mode = mode;
418 if (is_new) {
419 inode->i_rdev = 0;
420 switch (mode & S_IFMT) {
421 case S_IFBLK:
422 case S_IFCHR:
423 inode->i_rdev = MKDEV(be32_to_cpu(str->di_major),
424 be32_to_cpu(str->di_minor));
425 break;
426 }
427 }
428
429 i_uid_write(inode, be32_to_cpu(str->di_uid));
430 i_gid_write(inode, be32_to_cpu(str->di_gid));
431 set_nlink(inode, be32_to_cpu(str->di_nlink));
432 i_size_write(inode, be64_to_cpu(str->di_size));
433 gfs2_set_inode_blocks(inode, be64_to_cpu(str->di_blocks));
434 atime.tv_sec = be64_to_cpu(str->di_atime);
435 atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
436 iatime = inode_get_atime(inode);
437 if (timespec64_compare(lhs: &iatime, rhs: &atime) < 0)
438 inode_set_atime_to_ts(inode, ts: atime);
439 inode_set_mtime(inode, be64_to_cpu(str->di_mtime),
440 be32_to_cpu(str->di_mtime_nsec));
441 inode_set_ctime(inode, be64_to_cpu(str->di_ctime),
442 be32_to_cpu(str->di_ctime_nsec));
443
444 ip->i_goal = be64_to_cpu(str->di_goal_meta);
445 ip->i_generation = be64_to_cpu(str->di_generation);
446
447 ip->i_diskflags = be32_to_cpu(str->di_flags);
448 ip->i_eattr = be64_to_cpu(str->di_eattr);
449 /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
450 gfs2_set_inode_flags(inode);
451 height = be16_to_cpu(str->di_height);
452 if (unlikely(height > sdp->sd_max_height))
453 goto corrupt;
454 ip->i_height = (u8)height;
455
456 depth = be16_to_cpu(str->di_depth);
457 if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
458 goto corrupt;
459 ip->i_depth = (u8)depth;
460 ip->i_entries = be32_to_cpu(str->di_entries);
461
462 if (gfs2_is_stuffed(ip) && inode->i_size > gfs2_max_stuffed_size(ip))
463 goto corrupt;
464
465 if (S_ISREG(inode->i_mode))
466 gfs2_set_aops(inode);
467
468 return 0;
469corrupt:
470 gfs2_consist_inode(ip);
471 return -EIO;
472}
473
474/**
475 * gfs2_inode_refresh - Refresh the incore copy of the dinode
476 * @ip: The GFS2 inode
477 *
478 * Returns: errno
479 */
480
481int gfs2_inode_refresh(struct gfs2_inode *ip)
482{
483 struct buffer_head *dibh;
484 int error;
485
486 error = gfs2_meta_inode_buffer(ip, bhp: &dibh);
487 if (error)
488 return error;
489
490 error = gfs2_dinode_in(ip, buf: dibh->b_data);
491 brelse(bh: dibh);
492 return error;
493}
494
495/**
496 * inode_go_instantiate - read in an inode if necessary
497 * @gl: The glock
498 *
499 * Returns: errno
500 */
501
502static int inode_go_instantiate(struct gfs2_glock *gl)
503{
504 struct gfs2_inode *ip = gl->gl_object;
505
506 if (!ip) /* no inode to populate - read it in later */
507 return 0;
508
509 return gfs2_inode_refresh(ip);
510}
511
512static int inode_go_held(struct gfs2_holder *gh)
513{
514 struct gfs2_glock *gl = gh->gh_gl;
515 struct gfs2_inode *ip = gl->gl_object;
516 int error = 0;
517
518 if (!ip) /* no inode to populate - read it in later */
519 return 0;
520
521 if (gh->gh_state != LM_ST_DEFERRED)
522 inode_dio_wait(inode: &ip->i_inode);
523
524 if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
525 (gl->gl_state == LM_ST_EXCLUSIVE) &&
526 (gh->gh_state == LM_ST_EXCLUSIVE))
527 error = gfs2_truncatei_resume(ip);
528
529 return error;
530}
531
532/**
533 * inode_go_dump - print information about an inode
534 * @seq: The iterator
535 * @gl: The glock
536 * @fs_id_buf: file system id (may be empty)
537 *
538 */
539
540static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl,
541 const char *fs_id_buf)
542{
543 struct gfs2_inode *ip = gl->gl_object;
544 const struct inode *inode = &ip->i_inode;
545
546 if (ip == NULL)
547 return;
548
549 gfs2_print_dbg(seq, fmt: "%s I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu "
550 "p:%lu\n", fs_id_buf,
551 (unsigned long long)ip->i_no_formal_ino,
552 (unsigned long long)ip->i_no_addr,
553 IF2DT(inode->i_mode), ip->i_flags,
554 (unsigned int)ip->i_diskflags,
555 (unsigned long long)i_size_read(inode),
556 inode->i_data.nrpages);
557}
558
559/**
560 * freeze_go_callback - A cluster node is requesting a freeze
561 * @gl: the glock
562 * @remote: true if this came from a different cluster node
563 */
564
565static void freeze_go_callback(struct gfs2_glock *gl, bool remote)
566{
567 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
568 struct super_block *sb = sdp->sd_vfs;
569
570 if (!remote ||
571 (gl->gl_state != LM_ST_SHARED &&
572 gl->gl_state != LM_ST_UNLOCKED) ||
573 gl->gl_demote_state != LM_ST_UNLOCKED)
574 return;
575
576 /*
577 * Try to get an active super block reference to prevent racing with
578 * unmount (see super_trylock_shared()). But note that unmount isn't
579 * the only place where a write lock on s_umount is taken, and we can
580 * fail here because of things like remount as well.
581 */
582 if (down_read_trylock(sem: &sb->s_umount)) {
583 atomic_inc(v: &sb->s_active);
584 up_read(sem: &sb->s_umount);
585 if (!queue_work(wq: gfs2_freeze_wq, work: &sdp->sd_freeze_work))
586 deactivate_super(sb);
587 }
588}
589
590/**
591 * freeze_go_xmote_bh - After promoting/demoting the freeze glock
592 * @gl: the glock
593 */
594static int freeze_go_xmote_bh(struct gfs2_glock *gl)
595{
596 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
597 struct gfs2_inode *ip = GFS2_I(inode: sdp->sd_jdesc->jd_inode);
598 struct gfs2_glock *j_gl = ip->i_gl;
599 struct gfs2_log_header_host head;
600 int error;
601
602 if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
603 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
604
605 error = gfs2_find_jhead(jd: sdp->sd_jdesc, head: &head, keep_cache: false);
606 if (gfs2_assert_withdraw_delayed(sdp, !error))
607 return error;
608 if (gfs2_assert_withdraw_delayed(sdp, head.lh_flags &
609 GFS2_LOG_HEAD_UNMOUNT))
610 return -EIO;
611 sdp->sd_log_sequence = head.lh_sequence + 1;
612 gfs2_log_pointers_init(sdp, value: head.lh_blkno);
613 }
614 return 0;
615}
616
617/**
618 * iopen_go_callback - schedule the dcache entry for the inode to be deleted
619 * @gl: the glock
620 * @remote: true if this came from a different cluster node
621 *
622 * gl_lockref.lock lock is held while calling this
623 */
624static void iopen_go_callback(struct gfs2_glock *gl, bool remote)
625{
626 struct gfs2_inode *ip = gl->gl_object;
627 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
628
629 if (!remote || sb_rdonly(sb: sdp->sd_vfs) ||
630 test_bit(SDF_KILL, &sdp->sd_flags))
631 return;
632
633 if (gl->gl_demote_state == LM_ST_UNLOCKED &&
634 gl->gl_state == LM_ST_SHARED && ip) {
635 gl->gl_lockref.count++;
636 if (!gfs2_queue_try_to_evict(gl))
637 gl->gl_lockref.count--;
638 }
639}
640
641/**
642 * inode_go_free - wake up anyone waiting for dlm's unlock ast to free it
643 * @gl: glock being freed
644 *
645 * For now, this is only used for the journal inode glock. In withdraw
646 * situations, we need to wait for the glock to be freed so that we know
647 * other nodes may proceed with recovery / journal replay.
648 */
649static void inode_go_free(struct gfs2_glock *gl)
650{
651 /* Note that we cannot reference gl_object because it's already set
652 * to NULL by this point in its lifecycle. */
653 if (!test_bit(GLF_FREEING, &gl->gl_flags))
654 return;
655 clear_bit_unlock(nr: GLF_FREEING, addr: &gl->gl_flags);
656 wake_up_bit(word: &gl->gl_flags, bit: GLF_FREEING);
657}
658
659/**
660 * nondisk_go_callback - used to signal when a node did a withdraw
661 * @gl: the nondisk glock
662 * @remote: true if this came from a different cluster node
663 *
664 */
665static void nondisk_go_callback(struct gfs2_glock *gl, bool remote)
666{
667 struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
668
669 /* Ignore the callback unless it's from another node, and it's the
670 live lock. */
671 if (!remote || gl->gl_name.ln_number != GFS2_LIVE_LOCK)
672 return;
673
674 /* First order of business is to cancel the demote request. We don't
675 * really want to demote a nondisk glock. At best it's just to inform
676 * us of another node's withdraw. We'll keep it in SH mode. */
677 clear_bit(nr: GLF_DEMOTE, addr: &gl->gl_flags);
678 clear_bit(nr: GLF_PENDING_DEMOTE, addr: &gl->gl_flags);
679
680 /* Ignore the unlock if we're withdrawn, unmounting, or in recovery. */
681 if (test_bit(SDF_NORECOVERY, &sdp->sd_flags) ||
682 test_bit(SDF_WITHDRAWN, &sdp->sd_flags) ||
683 test_bit(SDF_REMOTE_WITHDRAW, &sdp->sd_flags))
684 return;
685
686 /* We only care when a node wants us to unlock, because that means
687 * they want a journal recovered. */
688 if (gl->gl_demote_state != LM_ST_UNLOCKED)
689 return;
690
691 if (sdp->sd_args.ar_spectator) {
692 fs_warn(sdp, "Spectator node cannot recover journals.\n");
693 return;
694 }
695
696 fs_warn(sdp, "Some node has withdrawn; checking for recovery.\n");
697 set_bit(nr: SDF_REMOTE_WITHDRAW, addr: &sdp->sd_flags);
698 /*
699 * We can't call remote_withdraw directly here or gfs2_recover_journal
700 * because this is called from the glock unlock function and the
701 * remote_withdraw needs to enqueue and dequeue the same "live" glock
702 * we were called from. So we queue it to the control work queue in
703 * lock_dlm.
704 */
705 queue_delayed_work(wq: gfs2_control_wq, dwork: &sdp->sd_control_work, delay: 0);
706}
707
708const struct gfs2_glock_operations gfs2_meta_glops = {
709 .go_type = LM_TYPE_META,
710 .go_flags = GLOF_NONDISK,
711};
712
713const struct gfs2_glock_operations gfs2_inode_glops = {
714 .go_sync = inode_go_sync,
715 .go_inval = inode_go_inval,
716 .go_demote_ok = inode_go_demote_ok,
717 .go_instantiate = inode_go_instantiate,
718 .go_held = inode_go_held,
719 .go_dump = inode_go_dump,
720 .go_type = LM_TYPE_INODE,
721 .go_flags = GLOF_ASPACE | GLOF_LRU | GLOF_LVB,
722 .go_free = inode_go_free,
723};
724
725const struct gfs2_glock_operations gfs2_rgrp_glops = {
726 .go_sync = rgrp_go_sync,
727 .go_inval = rgrp_go_inval,
728 .go_instantiate = gfs2_rgrp_go_instantiate,
729 .go_dump = gfs2_rgrp_go_dump,
730 .go_type = LM_TYPE_RGRP,
731 .go_flags = GLOF_LVB,
732};
733
734const struct gfs2_glock_operations gfs2_freeze_glops = {
735 .go_xmote_bh = freeze_go_xmote_bh,
736 .go_callback = freeze_go_callback,
737 .go_type = LM_TYPE_NONDISK,
738 .go_flags = GLOF_NONDISK,
739};
740
741const struct gfs2_glock_operations gfs2_iopen_glops = {
742 .go_type = LM_TYPE_IOPEN,
743 .go_callback = iopen_go_callback,
744 .go_dump = inode_go_dump,
745 .go_flags = GLOF_LRU | GLOF_NONDISK,
746 .go_subclass = 1,
747};
748
749const struct gfs2_glock_operations gfs2_flock_glops = {
750 .go_type = LM_TYPE_FLOCK,
751 .go_flags = GLOF_LRU | GLOF_NONDISK,
752};
753
754const struct gfs2_glock_operations gfs2_nondisk_glops = {
755 .go_type = LM_TYPE_NONDISK,
756 .go_flags = GLOF_NONDISK,
757 .go_callback = nondisk_go_callback,
758};
759
760const struct gfs2_glock_operations gfs2_quota_glops = {
761 .go_type = LM_TYPE_QUOTA,
762 .go_flags = GLOF_LVB | GLOF_LRU | GLOF_NONDISK,
763};
764
765const struct gfs2_glock_operations gfs2_journal_glops = {
766 .go_type = LM_TYPE_JOURNAL,
767 .go_flags = GLOF_NONDISK,
768};
769
770const struct gfs2_glock_operations *gfs2_glops_list[] = {
771 [LM_TYPE_META] = &gfs2_meta_glops,
772 [LM_TYPE_INODE] = &gfs2_inode_glops,
773 [LM_TYPE_RGRP] = &gfs2_rgrp_glops,
774 [LM_TYPE_IOPEN] = &gfs2_iopen_glops,
775 [LM_TYPE_FLOCK] = &gfs2_flock_glops,
776 [LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
777 [LM_TYPE_QUOTA] = &gfs2_quota_glops,
778 [LM_TYPE_JOURNAL] = &gfs2_journal_glops,
779};
780
781

source code of linux/fs/gfs2/glops.c