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
gfs2_ail_error(struct gfs2_glock * gl,const struct buffer_head * bh)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
__gfs2_ail_flush(struct gfs2_glock * gl,bool fsync,unsigned int nr_revokes)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
gfs2_ail_empty_gl(struct gfs2_glock * gl)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
gfs2_ail_flush(struct gfs2_glock * gl,bool fsync)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
rgrp_go_sync(struct gfs2_glock * gl)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
rgrp_go_inval(struct gfs2_glock * gl,int flags)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
gfs2_glock2inode(struct gfs2_glock * gl)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
gfs2_glock2rgrp(struct gfs2_glock * gl)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
gfs2_clear_glop_pending(struct gfs2_inode * ip)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
inode_go_sync(struct gfs2_glock * gl)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
inode_go_inval(struct gfs2_glock * gl,int flags)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
inode_go_demote_ok(const struct gfs2_glock * gl)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
gfs2_dinode_in(struct gfs2_inode * ip,const void * buf)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
gfs2_inode_refresh(struct gfs2_inode * ip)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
inode_go_lock(struct gfs2_holder * gh)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
inode_go_dump(struct seq_file * seq,struct gfs2_glock * gl,const char * fs_id_buf)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
freeze_go_sync(struct gfs2_glock * gl)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
freeze_go_xmote_bh(struct gfs2_glock * gl,struct gfs2_holder * gh)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
freeze_go_demote_ok(const struct gfs2_glock * gl)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 */
iopen_go_callback(struct gfs2_glock * gl,bool remote)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
682