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10#include <linux/bio.h>
11#include <linux/sched.h>
12#include <linux/slab.h>
13#include <linux/spinlock.h>
14#include <linux/completion.h>
15#include <linux/buffer_head.h>
16#include <linux/statfs.h>
17#include <linux/seq_file.h>
18#include <linux/mount.h>
19#include <linux/kthread.h>
20#include <linux/delay.h>
21#include <linux/gfs2_ondisk.h>
22#include <linux/crc32.h>
23#include <linux/time.h>
24#include <linux/wait.h>
25#include <linux/writeback.h>
26#include <linux/backing-dev.h>
27
28#include "gfs2.h"
29#include "incore.h"
30#include "bmap.h"
31#include "dir.h"
32#include "glock.h"
33#include "glops.h"
34#include "inode.h"
35#include "log.h"
36#include "meta_io.h"
37#include "quota.h"
38#include "recovery.h"
39#include "rgrp.h"
40#include "super.h"
41#include "trans.h"
42#include "util.h"
43#include "sys.h"
44#include "xattr.h"
45
46#define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x)
47
48enum {
49 Opt_lockproto,
50 Opt_locktable,
51 Opt_hostdata,
52 Opt_spectator,
53 Opt_ignore_local_fs,
54 Opt_localflocks,
55 Opt_localcaching,
56 Opt_debug,
57 Opt_nodebug,
58 Opt_upgrade,
59 Opt_acl,
60 Opt_noacl,
61 Opt_quota_off,
62 Opt_quota_account,
63 Opt_quota_on,
64 Opt_quota,
65 Opt_noquota,
66 Opt_suiddir,
67 Opt_nosuiddir,
68 Opt_data_writeback,
69 Opt_data_ordered,
70 Opt_meta,
71 Opt_discard,
72 Opt_nodiscard,
73 Opt_commit,
74 Opt_err_withdraw,
75 Opt_err_panic,
76 Opt_statfs_quantum,
77 Opt_statfs_percent,
78 Opt_quota_quantum,
79 Opt_barrier,
80 Opt_nobarrier,
81 Opt_rgrplvb,
82 Opt_norgrplvb,
83 Opt_error,
84};
85
86static const match_table_t tokens = {
87 {Opt_lockproto, "lockproto=%s"},
88 {Opt_locktable, "locktable=%s"},
89 {Opt_hostdata, "hostdata=%s"},
90 {Opt_spectator, "spectator"},
91 {Opt_spectator, "norecovery"},
92 {Opt_ignore_local_fs, "ignore_local_fs"},
93 {Opt_localflocks, "localflocks"},
94 {Opt_localcaching, "localcaching"},
95 {Opt_debug, "debug"},
96 {Opt_nodebug, "nodebug"},
97 {Opt_upgrade, "upgrade"},
98 {Opt_acl, "acl"},
99 {Opt_noacl, "noacl"},
100 {Opt_quota_off, "quota=off"},
101 {Opt_quota_account, "quota=account"},
102 {Opt_quota_on, "quota=on"},
103 {Opt_quota, "quota"},
104 {Opt_noquota, "noquota"},
105 {Opt_suiddir, "suiddir"},
106 {Opt_nosuiddir, "nosuiddir"},
107 {Opt_data_writeback, "data=writeback"},
108 {Opt_data_ordered, "data=ordered"},
109 {Opt_meta, "meta"},
110 {Opt_discard, "discard"},
111 {Opt_nodiscard, "nodiscard"},
112 {Opt_commit, "commit=%d"},
113 {Opt_err_withdraw, "errors=withdraw"},
114 {Opt_err_panic, "errors=panic"},
115 {Opt_statfs_quantum, "statfs_quantum=%d"},
116 {Opt_statfs_percent, "statfs_percent=%d"},
117 {Opt_quota_quantum, "quota_quantum=%d"},
118 {Opt_barrier, "barrier"},
119 {Opt_nobarrier, "nobarrier"},
120 {Opt_rgrplvb, "rgrplvb"},
121 {Opt_norgrplvb, "norgrplvb"},
122 {Opt_error, NULL}
123};
124
125
126
127
128
129
130
131
132
133int gfs2_mount_args(struct gfs2_args *args, char *options)
134{
135 char *o;
136 int token;
137 substring_t tmp[MAX_OPT_ARGS];
138 int rv;
139
140
141
142
143 while (1) {
144 o = strsep(&options, ",");
145 if (o == NULL)
146 break;
147 if (*o == '\0')
148 continue;
149
150 token = match_token(o, tokens, tmp);
151 switch (token) {
152 case Opt_lockproto:
153 match_strlcpy(args->ar_lockproto, &tmp[0],
154 GFS2_LOCKNAME_LEN);
155 break;
156 case Opt_locktable:
157 match_strlcpy(args->ar_locktable, &tmp[0],
158 GFS2_LOCKNAME_LEN);
159 break;
160 case Opt_hostdata:
161 match_strlcpy(args->ar_hostdata, &tmp[0],
162 GFS2_LOCKNAME_LEN);
163 break;
164 case Opt_spectator:
165 args->ar_spectator = 1;
166 break;
167 case Opt_ignore_local_fs:
168
169 break;
170 case Opt_localflocks:
171 args->ar_localflocks = 1;
172 break;
173 case Opt_localcaching:
174
175 break;
176 case Opt_debug:
177 if (args->ar_errors == GFS2_ERRORS_PANIC) {
178 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic "
179 "are mutually exclusive.\n");
180 return -EINVAL;
181 }
182 args->ar_debug = 1;
183 break;
184 case Opt_nodebug:
185 args->ar_debug = 0;
186 break;
187 case Opt_upgrade:
188
189 break;
190 case Opt_acl:
191 args->ar_posix_acl = 1;
192 break;
193 case Opt_noacl:
194 args->ar_posix_acl = 0;
195 break;
196 case Opt_quota_off:
197 case Opt_noquota:
198 args->ar_quota = GFS2_QUOTA_OFF;
199 break;
200 case Opt_quota_account:
201 args->ar_quota = GFS2_QUOTA_ACCOUNT;
202 break;
203 case Opt_quota_on:
204 case Opt_quota:
205 args->ar_quota = GFS2_QUOTA_ON;
206 break;
207 case Opt_suiddir:
208 args->ar_suiddir = 1;
209 break;
210 case Opt_nosuiddir:
211 args->ar_suiddir = 0;
212 break;
213 case Opt_data_writeback:
214 args->ar_data = GFS2_DATA_WRITEBACK;
215 break;
216 case Opt_data_ordered:
217 args->ar_data = GFS2_DATA_ORDERED;
218 break;
219 case Opt_meta:
220 args->ar_meta = 1;
221 break;
222 case Opt_discard:
223 args->ar_discard = 1;
224 break;
225 case Opt_nodiscard:
226 args->ar_discard = 0;
227 break;
228 case Opt_commit:
229 rv = match_int(&tmp[0], &args->ar_commit);
230 if (rv || args->ar_commit <= 0) {
231 printk(KERN_WARNING "GFS2: commit mount option requires a positive numeric argument\n");
232 return rv ? rv : -EINVAL;
233 }
234 break;
235 case Opt_statfs_quantum:
236 rv = match_int(&tmp[0], &args->ar_statfs_quantum);
237 if (rv || args->ar_statfs_quantum < 0) {
238 printk(KERN_WARNING "GFS2: statfs_quantum mount option requires a non-negative numeric argument\n");
239 return rv ? rv : -EINVAL;
240 }
241 break;
242 case Opt_quota_quantum:
243 rv = match_int(&tmp[0], &args->ar_quota_quantum);
244 if (rv || args->ar_quota_quantum <= 0) {
245 printk(KERN_WARNING "GFS2: quota_quantum mount option requires a positive numeric argument\n");
246 return rv ? rv : -EINVAL;
247 }
248 break;
249 case Opt_statfs_percent:
250 rv = match_int(&tmp[0], &args->ar_statfs_percent);
251 if (rv || args->ar_statfs_percent < 0 ||
252 args->ar_statfs_percent > 100) {
253 printk(KERN_WARNING "statfs_percent mount option requires a numeric argument between 0 and 100\n");
254 return rv ? rv : -EINVAL;
255 }
256 break;
257 case Opt_err_withdraw:
258 args->ar_errors = GFS2_ERRORS_WITHDRAW;
259 break;
260 case Opt_err_panic:
261 if (args->ar_debug) {
262 printk(KERN_WARNING "GFS2: -o debug and -o errors=panic "
263 "are mutually exclusive.\n");
264 return -EINVAL;
265 }
266 args->ar_errors = GFS2_ERRORS_PANIC;
267 break;
268 case Opt_barrier:
269 args->ar_nobarrier = 0;
270 break;
271 case Opt_nobarrier:
272 args->ar_nobarrier = 1;
273 break;
274 case Opt_rgrplvb:
275 args->ar_rgrplvb = 1;
276 break;
277 case Opt_norgrplvb:
278 args->ar_rgrplvb = 0;
279 break;
280 case Opt_error:
281 default:
282 printk(KERN_WARNING "GFS2: invalid mount option: %s\n", o);
283 return -EINVAL;
284 }
285 }
286
287 return 0;
288}
289
290
291
292
293
294
295
296void gfs2_jindex_free(struct gfs2_sbd *sdp)
297{
298 struct list_head list, *head;
299 struct gfs2_jdesc *jd;
300 struct gfs2_journal_extent *jext;
301
302 spin_lock(&sdp->sd_jindex_spin);
303 list_add(&list, &sdp->sd_jindex_list);
304 list_del_init(&sdp->sd_jindex_list);
305 sdp->sd_journals = 0;
306 spin_unlock(&sdp->sd_jindex_spin);
307
308 while (!list_empty(&list)) {
309 jd = list_entry(list.next, struct gfs2_jdesc, jd_list);
310 head = &jd->extent_list;
311 while (!list_empty(head)) {
312 jext = list_entry(head->next,
313 struct gfs2_journal_extent,
314 extent_list);
315 list_del(&jext->extent_list);
316 kfree(jext);
317 }
318 list_del(&jd->jd_list);
319 iput(jd->jd_inode);
320 kfree(jd);
321 }
322}
323
324static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid)
325{
326 struct gfs2_jdesc *jd;
327 int found = 0;
328
329 list_for_each_entry(jd, head, jd_list) {
330 if (jd->jd_jid == jid) {
331 found = 1;
332 break;
333 }
334 }
335
336 if (!found)
337 jd = NULL;
338
339 return jd;
340}
341
342struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid)
343{
344 struct gfs2_jdesc *jd;
345
346 spin_lock(&sdp->sd_jindex_spin);
347 jd = jdesc_find_i(&sdp->sd_jindex_list, jid);
348 spin_unlock(&sdp->sd_jindex_spin);
349
350 return jd;
351}
352
353int gfs2_jdesc_check(struct gfs2_jdesc *jd)
354{
355 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
356 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
357 u64 size = i_size_read(jd->jd_inode);
358
359 if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, 1 << 30))
360 return -EIO;
361
362 jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift;
363
364 if (gfs2_write_alloc_required(ip, 0, size)) {
365 gfs2_consist_inode(ip);
366 return -EIO;
367 }
368
369 return 0;
370}
371
372
373
374
375
376
377
378
379int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
380{
381 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
382 struct gfs2_glock *j_gl = ip->i_gl;
383 struct gfs2_holder t_gh;
384 struct gfs2_log_header_host head;
385 int error;
386
387 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh);
388 if (error)
389 return error;
390
391 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
392
393 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
394 if (error)
395 goto fail;
396
397 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
398 gfs2_consist(sdp);
399 error = -EIO;
400 goto fail;
401 }
402
403
404 sdp->sd_log_sequence = head.lh_sequence + 1;
405 gfs2_log_pointers_init(sdp, head.lh_blkno);
406
407 error = gfs2_quota_init(sdp);
408 if (error)
409 goto fail;
410
411 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
412
413 gfs2_glock_dq_uninit(&t_gh);
414
415 return 0;
416
417fail:
418 t_gh.gh_flags |= GL_NOCACHE;
419 gfs2_glock_dq_uninit(&t_gh);
420
421 return error;
422}
423
424void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
425{
426 const struct gfs2_statfs_change *str = buf;
427
428 sc->sc_total = be64_to_cpu(str->sc_total);
429 sc->sc_free = be64_to_cpu(str->sc_free);
430 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes);
431}
432
433static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
434{
435 struct gfs2_statfs_change *str = buf;
436
437 str->sc_total = cpu_to_be64(sc->sc_total);
438 str->sc_free = cpu_to_be64(sc->sc_free);
439 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes);
440}
441
442int gfs2_statfs_init(struct gfs2_sbd *sdp)
443{
444 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
445 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
446 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
447 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
448 struct buffer_head *m_bh, *l_bh;
449 struct gfs2_holder gh;
450 int error;
451
452 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
453 &gh);
454 if (error)
455 return error;
456
457 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
458 if (error)
459 goto out;
460
461 if (sdp->sd_args.ar_spectator) {
462 spin_lock(&sdp->sd_statfs_spin);
463 gfs2_statfs_change_in(m_sc, m_bh->b_data +
464 sizeof(struct gfs2_dinode));
465 spin_unlock(&sdp->sd_statfs_spin);
466 } else {
467 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
468 if (error)
469 goto out_m_bh;
470
471 spin_lock(&sdp->sd_statfs_spin);
472 gfs2_statfs_change_in(m_sc, m_bh->b_data +
473 sizeof(struct gfs2_dinode));
474 gfs2_statfs_change_in(l_sc, l_bh->b_data +
475 sizeof(struct gfs2_dinode));
476 spin_unlock(&sdp->sd_statfs_spin);
477
478 brelse(l_bh);
479 }
480
481out_m_bh:
482 brelse(m_bh);
483out:
484 gfs2_glock_dq_uninit(&gh);
485 return 0;
486}
487
488void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
489 s64 dinodes)
490{
491 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
492 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
493 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
494 struct buffer_head *l_bh;
495 s64 x, y;
496 int need_sync = 0;
497 int error;
498
499 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
500 if (error)
501 return;
502
503 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
504
505 spin_lock(&sdp->sd_statfs_spin);
506 l_sc->sc_total += total;
507 l_sc->sc_free += free;
508 l_sc->sc_dinodes += dinodes;
509 gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode));
510 if (sdp->sd_args.ar_statfs_percent) {
511 x = 100 * l_sc->sc_free;
512 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
513 if (x >= y || x <= -y)
514 need_sync = 1;
515 }
516 spin_unlock(&sdp->sd_statfs_spin);
517
518 brelse(l_bh);
519 if (need_sync)
520 gfs2_wake_up_statfs(sdp);
521}
522
523void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
524 struct buffer_head *l_bh)
525{
526 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
527 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
528 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
529 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
530
531 gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1);
532
533 spin_lock(&sdp->sd_statfs_spin);
534 m_sc->sc_total += l_sc->sc_total;
535 m_sc->sc_free += l_sc->sc_free;
536 m_sc->sc_dinodes += l_sc->sc_dinodes;
537 memset(l_sc, 0, sizeof(struct gfs2_statfs_change));
538 memset(l_bh->b_data + sizeof(struct gfs2_dinode),
539 0, sizeof(struct gfs2_statfs_change));
540 spin_unlock(&sdp->sd_statfs_spin);
541
542 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
543 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
544}
545
546int gfs2_statfs_sync(struct super_block *sb, int type)
547{
548 struct gfs2_sbd *sdp = sb->s_fs_info;
549 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
550 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
551 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
552 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
553 struct gfs2_holder gh;
554 struct buffer_head *m_bh, *l_bh;
555 int error;
556
557 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
558 &gh);
559 if (error)
560 return error;
561
562 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
563 if (error)
564 goto out;
565
566 spin_lock(&sdp->sd_statfs_spin);
567 gfs2_statfs_change_in(m_sc, m_bh->b_data +
568 sizeof(struct gfs2_dinode));
569 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) {
570 spin_unlock(&sdp->sd_statfs_spin);
571 goto out_bh;
572 }
573 spin_unlock(&sdp->sd_statfs_spin);
574
575 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
576 if (error)
577 goto out_bh;
578
579 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
580 if (error)
581 goto out_bh2;
582
583 update_statfs(sdp, m_bh, l_bh);
584 sdp->sd_statfs_force_sync = 0;
585
586 gfs2_trans_end(sdp);
587
588out_bh2:
589 brelse(l_bh);
590out_bh:
591 brelse(m_bh);
592out:
593 gfs2_glock_dq_uninit(&gh);
594 return error;
595}
596
597struct lfcc {
598 struct list_head list;
599 struct gfs2_holder gh;
600};
601
602
603
604
605
606
607
608
609
610
611
612static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
613 struct gfs2_holder *t_gh)
614{
615 struct gfs2_inode *ip;
616 struct gfs2_jdesc *jd;
617 struct lfcc *lfcc;
618 LIST_HEAD(list);
619 struct gfs2_log_header_host lh;
620 int error;
621
622 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
623 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL);
624 if (!lfcc) {
625 error = -ENOMEM;
626 goto out;
627 }
628 ip = GFS2_I(jd->jd_inode);
629 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh);
630 if (error) {
631 kfree(lfcc);
632 goto out;
633 }
634 list_add(&lfcc->list, &list);
635 }
636
637 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED,
638 GL_NOCACHE, t_gh);
639
640 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
641 error = gfs2_jdesc_check(jd);
642 if (error)
643 break;
644 error = gfs2_find_jhead(jd, &lh);
645 if (error)
646 break;
647 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
648 error = -EBUSY;
649 break;
650 }
651 }
652
653 if (error)
654 gfs2_glock_dq_uninit(t_gh);
655
656out:
657 while (!list_empty(&list)) {
658 lfcc = list_entry(list.next, struct lfcc, list);
659 list_del(&lfcc->list);
660 gfs2_glock_dq_uninit(&lfcc->gh);
661 kfree(lfcc);
662 }
663 return error;
664}
665
666
667
668
669
670
671
672
673
674
675
676
677int gfs2_freeze_fs(struct gfs2_sbd *sdp)
678{
679 int error = 0;
680
681 mutex_lock(&sdp->sd_freeze_lock);
682
683 if (!sdp->sd_freeze_count++) {
684 error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh);
685 if (error)
686 sdp->sd_freeze_count--;
687 }
688
689 mutex_unlock(&sdp->sd_freeze_lock);
690
691 return error;
692}
693
694
695
696
697
698
699
700
701
702
703
704void gfs2_unfreeze_fs(struct gfs2_sbd *sdp)
705{
706 mutex_lock(&sdp->sd_freeze_lock);
707
708 if (sdp->sd_freeze_count && !--sdp->sd_freeze_count)
709 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
710
711 mutex_unlock(&sdp->sd_freeze_lock);
712}
713
714void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
715{
716 struct gfs2_dinode *str = buf;
717
718 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
719 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
720 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
721 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
722 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
723 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
724 str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
725 str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
726 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
727 str->di_size = cpu_to_be64(i_size_read(&ip->i_inode));
728 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
729 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
730 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
731 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
732
733 str->di_goal_meta = cpu_to_be64(ip->i_goal);
734 str->di_goal_data = cpu_to_be64(ip->i_goal);
735 str->di_generation = cpu_to_be64(ip->i_generation);
736
737 str->di_flags = cpu_to_be32(ip->i_diskflags);
738 str->di_height = cpu_to_be16(ip->i_height);
739 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
740 !(ip->i_diskflags & GFS2_DIF_EXHASH) ?
741 GFS2_FORMAT_DE : 0);
742 str->di_depth = cpu_to_be16(ip->i_depth);
743 str->di_entries = cpu_to_be32(ip->i_entries);
744
745 str->di_eattr = cpu_to_be64(ip->i_eattr);
746 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
747 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
748 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
749}
750
751
752
753
754
755
756
757
758
759static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
760{
761 struct gfs2_inode *ip = GFS2_I(inode);
762 struct gfs2_sbd *sdp = GFS2_SB(inode);
763 struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
764 struct backing_dev_info *bdi = metamapping->backing_dev_info;
765 int ret = 0;
766
767 if (wbc->sync_mode == WB_SYNC_ALL)
768 gfs2_log_flush(GFS2_SB(inode), ip->i_gl);
769 if (bdi->dirty_exceeded)
770 gfs2_ail1_flush(sdp, wbc);
771 else
772 filemap_fdatawrite(metamapping);
773 if (wbc->sync_mode == WB_SYNC_ALL)
774 ret = filemap_fdatawait(metamapping);
775 if (ret)
776 mark_inode_dirty_sync(inode);
777 return ret;
778}
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793static void gfs2_dirty_inode(struct inode *inode, int flags)
794{
795 struct gfs2_inode *ip = GFS2_I(inode);
796 struct gfs2_sbd *sdp = GFS2_SB(inode);
797 struct buffer_head *bh;
798 struct gfs2_holder gh;
799 int need_unlock = 0;
800 int need_endtrans = 0;
801 int ret;
802
803 if (!(flags & (I_DIRTY_DATASYNC|I_DIRTY_SYNC)))
804 return;
805
806 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
807 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
808 if (ret) {
809 fs_err(sdp, "dirty_inode: glock %d\n", ret);
810 return;
811 }
812 need_unlock = 1;
813 } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
814 return;
815
816 if (current->journal_info == NULL) {
817 ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
818 if (ret) {
819 fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret);
820 goto out;
821 }
822 need_endtrans = 1;
823 }
824
825 ret = gfs2_meta_inode_buffer(ip, &bh);
826 if (ret == 0) {
827 gfs2_trans_add_bh(ip->i_gl, bh, 1);
828 gfs2_dinode_out(ip, bh->b_data);
829 brelse(bh);
830 }
831
832 if (need_endtrans)
833 gfs2_trans_end(sdp);
834out:
835 if (need_unlock)
836 gfs2_glock_dq_uninit(&gh);
837}
838
839
840
841
842
843
844
845
846static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
847{
848 struct gfs2_holder t_gh;
849 int error;
850
851 flush_workqueue(gfs2_delete_workqueue);
852 gfs2_quota_sync(sdp->sd_vfs, 0);
853 gfs2_statfs_sync(sdp->sd_vfs, 0);
854
855 error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE,
856 &t_gh);
857 if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
858 return error;
859
860 gfs2_meta_syncfs(sdp);
861 gfs2_log_shutdown(sdp);
862
863 clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
864
865 if (t_gh.gh_gl)
866 gfs2_glock_dq_uninit(&t_gh);
867
868 gfs2_quota_cleanup(sdp);
869
870 return error;
871}
872
873static int gfs2_umount_recovery_wait(void *word)
874{
875 schedule();
876 return 0;
877}
878
879
880
881
882
883
884
885static void gfs2_put_super(struct super_block *sb)
886{
887 struct gfs2_sbd *sdp = sb->s_fs_info;
888 int error;
889 struct gfs2_jdesc *jd;
890
891
892
893 mutex_lock(&sdp->sd_freeze_lock);
894 if (sdp->sd_freeze_count)
895 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
896 mutex_unlock(&sdp->sd_freeze_lock);
897
898
899 set_bit(SDF_NORECOVERY, &sdp->sd_flags);
900 smp_mb();
901
902
903restart:
904 spin_lock(&sdp->sd_jindex_spin);
905 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
906 if (!test_bit(JDF_RECOVERY, &jd->jd_flags))
907 continue;
908 spin_unlock(&sdp->sd_jindex_spin);
909 wait_on_bit(&jd->jd_flags, JDF_RECOVERY,
910 gfs2_umount_recovery_wait, TASK_UNINTERRUPTIBLE);
911 goto restart;
912 }
913 spin_unlock(&sdp->sd_jindex_spin);
914
915 kthread_stop(sdp->sd_quotad_process);
916 kthread_stop(sdp->sd_logd_process);
917
918 if (!(sb->s_flags & MS_RDONLY)) {
919 error = gfs2_make_fs_ro(sdp);
920 if (error)
921 gfs2_io_error(sdp);
922 }
923
924
925
926
927 iput(sdp->sd_jindex);
928 iput(sdp->sd_statfs_inode);
929 iput(sdp->sd_rindex);
930 iput(sdp->sd_quota_inode);
931
932 gfs2_glock_put(sdp->sd_rename_gl);
933 gfs2_glock_put(sdp->sd_trans_gl);
934
935 if (!sdp->sd_args.ar_spectator) {
936 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
937 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
938 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
939 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
940 iput(sdp->sd_sc_inode);
941 iput(sdp->sd_qc_inode);
942 }
943
944 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
945 gfs2_clear_rgrpd(sdp);
946 gfs2_jindex_free(sdp);
947
948 gfs2_gl_hash_clear(sdp);
949
950 gfs2_lm_unmount(sdp);
951
952
953 gfs2_sys_fs_del(sdp);
954}
955
956
957
958
959
960
961
962
963static int gfs2_sync_fs(struct super_block *sb, int wait)
964{
965 struct gfs2_sbd *sdp = sb->s_fs_info;
966
967 gfs2_quota_sync(sb, -1);
968 if (wait && sdp)
969 gfs2_log_flush(sdp, NULL);
970 return 0;
971}
972
973
974
975
976
977
978
979static int gfs2_freeze(struct super_block *sb)
980{
981 struct gfs2_sbd *sdp = sb->s_fs_info;
982 int error;
983
984 if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
985 return -EINVAL;
986
987 for (;;) {
988 error = gfs2_freeze_fs(sdp);
989 if (!error)
990 break;
991
992 switch (error) {
993 case -EBUSY:
994 fs_err(sdp, "waiting for recovery before freeze\n");
995 break;
996
997 default:
998 fs_err(sdp, "error freezing FS: %d\n", error);
999 break;
1000 }
1001
1002 fs_err(sdp, "retrying...\n");
1003 msleep(1000);
1004 }
1005 return 0;
1006}
1007
1008
1009
1010
1011
1012
1013
1014static int gfs2_unfreeze(struct super_block *sb)
1015{
1016 gfs2_unfreeze_fs(sb->s_fs_info);
1017 return 0;
1018}
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
1029 struct gfs2_statfs_change_host *sc)
1030{
1031 gfs2_rgrp_verify(rgd);
1032 sc->sc_total += rgd->rd_data;
1033 sc->sc_free += rgd->rd_free;
1034 sc->sc_dinodes += rgd->rd_dinodes;
1035 return 0;
1036}
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
1052{
1053 struct gfs2_rgrpd *rgd_next;
1054 struct gfs2_holder *gha, *gh;
1055 unsigned int slots = 64;
1056 unsigned int x;
1057 int done;
1058 int error = 0, err;
1059
1060 memset(sc, 0, sizeof(struct gfs2_statfs_change_host));
1061 gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL);
1062 if (!gha)
1063 return -ENOMEM;
1064
1065 rgd_next = gfs2_rgrpd_get_first(sdp);
1066
1067 for (;;) {
1068 done = 1;
1069
1070 for (x = 0; x < slots; x++) {
1071 gh = gha + x;
1072
1073 if (gh->gh_gl && gfs2_glock_poll(gh)) {
1074 err = gfs2_glock_wait(gh);
1075 if (err) {
1076 gfs2_holder_uninit(gh);
1077 error = err;
1078 } else {
1079 if (!error)
1080 error = statfs_slow_fill(
1081 gh->gh_gl->gl_object, sc);
1082 gfs2_glock_dq_uninit(gh);
1083 }
1084 }
1085
1086 if (gh->gh_gl)
1087 done = 0;
1088 else if (rgd_next && !error) {
1089 error = gfs2_glock_nq_init(rgd_next->rd_gl,
1090 LM_ST_SHARED,
1091 GL_ASYNC,
1092 gh);
1093 rgd_next = gfs2_rgrpd_get_next(rgd_next);
1094 done = 0;
1095 }
1096
1097 if (signal_pending(current))
1098 error = -ERESTARTSYS;
1099 }
1100
1101 if (done)
1102 break;
1103
1104 yield();
1105 }
1106
1107 kfree(gha);
1108 return error;
1109}
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
1120{
1121 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
1122 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
1123
1124 spin_lock(&sdp->sd_statfs_spin);
1125
1126 *sc = *m_sc;
1127 sc->sc_total += l_sc->sc_total;
1128 sc->sc_free += l_sc->sc_free;
1129 sc->sc_dinodes += l_sc->sc_dinodes;
1130
1131 spin_unlock(&sdp->sd_statfs_spin);
1132
1133 if (sc->sc_free < 0)
1134 sc->sc_free = 0;
1135 if (sc->sc_free > sc->sc_total)
1136 sc->sc_free = sc->sc_total;
1137 if (sc->sc_dinodes < 0)
1138 sc->sc_dinodes = 0;
1139
1140 return 0;
1141}
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1152{
1153 struct super_block *sb = dentry->d_inode->i_sb;
1154 struct gfs2_sbd *sdp = sb->s_fs_info;
1155 struct gfs2_statfs_change_host sc;
1156 int error;
1157
1158 error = gfs2_rindex_update(sdp);
1159 if (error)
1160 return error;
1161
1162 if (gfs2_tune_get(sdp, gt_statfs_slow))
1163 error = gfs2_statfs_slow(sdp, &sc);
1164 else
1165 error = gfs2_statfs_i(sdp, &sc);
1166
1167 if (error)
1168 return error;
1169
1170 buf->f_type = GFS2_MAGIC;
1171 buf->f_bsize = sdp->sd_sb.sb_bsize;
1172 buf->f_blocks = sc.sc_total;
1173 buf->f_bfree = sc.sc_free;
1174 buf->f_bavail = sc.sc_free;
1175 buf->f_files = sc.sc_dinodes + sc.sc_free;
1176 buf->f_ffree = sc.sc_free;
1177 buf->f_namelen = GFS2_FNAMESIZE;
1178
1179 return 0;
1180}
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
1192{
1193 struct gfs2_sbd *sdp = sb->s_fs_info;
1194 struct gfs2_args args = sdp->sd_args;
1195 struct gfs2_tune *gt = &sdp->sd_tune;
1196 int error;
1197
1198 spin_lock(>->gt_spin);
1199 args.ar_commit = gt->gt_logd_secs;
1200 args.ar_quota_quantum = gt->gt_quota_quantum;
1201 if (gt->gt_statfs_slow)
1202 args.ar_statfs_quantum = 0;
1203 else
1204 args.ar_statfs_quantum = gt->gt_statfs_quantum;
1205 spin_unlock(>->gt_spin);
1206 error = gfs2_mount_args(&args, data);
1207 if (error)
1208 return error;
1209
1210
1211 if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) ||
1212 strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) ||
1213 strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata))
1214 return -EINVAL;
1215
1216
1217 if (args_neq(&args, &sdp->sd_args, spectator) ||
1218 args_neq(&args, &sdp->sd_args, localflocks) ||
1219 args_neq(&args, &sdp->sd_args, meta))
1220 return -EINVAL;
1221
1222 if (sdp->sd_args.ar_spectator)
1223 *flags |= MS_RDONLY;
1224
1225 if ((sb->s_flags ^ *flags) & MS_RDONLY) {
1226 if (*flags & MS_RDONLY)
1227 error = gfs2_make_fs_ro(sdp);
1228 else
1229 error = gfs2_make_fs_rw(sdp);
1230 if (error)
1231 return error;
1232 }
1233
1234 sdp->sd_args = args;
1235 if (sdp->sd_args.ar_posix_acl)
1236 sb->s_flags |= MS_POSIXACL;
1237 else
1238 sb->s_flags &= ~MS_POSIXACL;
1239 if (sdp->sd_args.ar_nobarrier)
1240 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1241 else
1242 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1243 spin_lock(>->gt_spin);
1244 gt->gt_logd_secs = args.ar_commit;
1245 gt->gt_quota_quantum = args.ar_quota_quantum;
1246 if (args.ar_statfs_quantum) {
1247 gt->gt_statfs_slow = 0;
1248 gt->gt_statfs_quantum = args.ar_statfs_quantum;
1249 }
1250 else {
1251 gt->gt_statfs_slow = 1;
1252 gt->gt_statfs_quantum = 30;
1253 }
1254 spin_unlock(>->gt_spin);
1255
1256 gfs2_online_uevent(sdp);
1257 return 0;
1258}
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275static int gfs2_drop_inode(struct inode *inode)
1276{
1277 struct gfs2_inode *ip = GFS2_I(inode);
1278
1279 if (inode->i_nlink) {
1280 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1281 if (gl && test_bit(GLF_DEMOTE, &gl->gl_flags))
1282 clear_nlink(inode);
1283 }
1284 return generic_drop_inode(inode);
1285}
1286
1287static int is_ancestor(const struct dentry *d1, const struct dentry *d2)
1288{
1289 do {
1290 if (d1 == d2)
1291 return 1;
1292 d1 = d1->d_parent;
1293 } while (!IS_ROOT(d1));
1294 return 0;
1295}
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305static int gfs2_show_options(struct seq_file *s, struct dentry *root)
1306{
1307 struct gfs2_sbd *sdp = root->d_sb->s_fs_info;
1308 struct gfs2_args *args = &sdp->sd_args;
1309 int val;
1310
1311 if (is_ancestor(root, sdp->sd_master_dir))
1312 seq_printf(s, ",meta");
1313 if (args->ar_lockproto[0])
1314 seq_printf(s, ",lockproto=%s", args->ar_lockproto);
1315 if (args->ar_locktable[0])
1316 seq_printf(s, ",locktable=%s", args->ar_locktable);
1317 if (args->ar_hostdata[0])
1318 seq_printf(s, ",hostdata=%s", args->ar_hostdata);
1319 if (args->ar_spectator)
1320 seq_printf(s, ",spectator");
1321 if (args->ar_localflocks)
1322 seq_printf(s, ",localflocks");
1323 if (args->ar_debug)
1324 seq_printf(s, ",debug");
1325 if (args->ar_posix_acl)
1326 seq_printf(s, ",acl");
1327 if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
1328 char *state;
1329 switch (args->ar_quota) {
1330 case GFS2_QUOTA_OFF:
1331 state = "off";
1332 break;
1333 case GFS2_QUOTA_ACCOUNT:
1334 state = "account";
1335 break;
1336 case GFS2_QUOTA_ON:
1337 state = "on";
1338 break;
1339 default:
1340 state = "unknown";
1341 break;
1342 }
1343 seq_printf(s, ",quota=%s", state);
1344 }
1345 if (args->ar_suiddir)
1346 seq_printf(s, ",suiddir");
1347 if (args->ar_data != GFS2_DATA_DEFAULT) {
1348 char *state;
1349 switch (args->ar_data) {
1350 case GFS2_DATA_WRITEBACK:
1351 state = "writeback";
1352 break;
1353 case GFS2_DATA_ORDERED:
1354 state = "ordered";
1355 break;
1356 default:
1357 state = "unknown";
1358 break;
1359 }
1360 seq_printf(s, ",data=%s", state);
1361 }
1362 if (args->ar_discard)
1363 seq_printf(s, ",discard");
1364 val = sdp->sd_tune.gt_logd_secs;
1365 if (val != 30)
1366 seq_printf(s, ",commit=%d", val);
1367 val = sdp->sd_tune.gt_statfs_quantum;
1368 if (val != 30)
1369 seq_printf(s, ",statfs_quantum=%d", val);
1370 else if (sdp->sd_tune.gt_statfs_slow)
1371 seq_puts(s, ",statfs_quantum=0");
1372 val = sdp->sd_tune.gt_quota_quantum;
1373 if (val != 60)
1374 seq_printf(s, ",quota_quantum=%d", val);
1375 if (args->ar_statfs_percent)
1376 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
1377 if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
1378 const char *state;
1379
1380 switch (args->ar_errors) {
1381 case GFS2_ERRORS_WITHDRAW:
1382 state = "withdraw";
1383 break;
1384 case GFS2_ERRORS_PANIC:
1385 state = "panic";
1386 break;
1387 default:
1388 state = "unknown";
1389 break;
1390 }
1391 seq_printf(s, ",errors=%s", state);
1392 }
1393 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
1394 seq_printf(s, ",nobarrier");
1395 if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
1396 seq_printf(s, ",demote_interface_used");
1397 if (args->ar_rgrplvb)
1398 seq_printf(s, ",rgrplvb");
1399 return 0;
1400}
1401
1402static void gfs2_final_release_pages(struct gfs2_inode *ip)
1403{
1404 struct inode *inode = &ip->i_inode;
1405 struct gfs2_glock *gl = ip->i_gl;
1406
1407 truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0);
1408 truncate_inode_pages(&inode->i_data, 0);
1409
1410 if (atomic_read(&gl->gl_revokes) == 0) {
1411 clear_bit(GLF_LFLUSH, &gl->gl_flags);
1412 clear_bit(GLF_DIRTY, &gl->gl_flags);
1413 }
1414}
1415
1416static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
1417{
1418 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1419 struct gfs2_rgrpd *rgd;
1420 struct gfs2_holder gh;
1421 int error;
1422
1423 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
1424 gfs2_consist_inode(ip);
1425 return -EIO;
1426 }
1427
1428 error = gfs2_rindex_update(sdp);
1429 if (error)
1430 return error;
1431
1432 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
1433 if (error)
1434 return error;
1435
1436 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1437 if (!rgd) {
1438 gfs2_consist_inode(ip);
1439 error = -EIO;
1440 goto out_qs;
1441 }
1442
1443 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
1444 if (error)
1445 goto out_qs;
1446
1447 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA,
1448 sdp->sd_jdesc->jd_blocks);
1449 if (error)
1450 goto out_rg_gunlock;
1451
1452 gfs2_free_di(rgd, ip);
1453
1454 gfs2_final_release_pages(ip);
1455
1456 gfs2_trans_end(sdp);
1457
1458out_rg_gunlock:
1459 gfs2_glock_dq_uninit(&gh);
1460out_qs:
1461 gfs2_quota_unhold(ip);
1462 return error;
1463}
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486static void gfs2_evict_inode(struct inode *inode)
1487{
1488 struct super_block *sb = inode->i_sb;
1489 struct gfs2_sbd *sdp = sb->s_fs_info;
1490 struct gfs2_inode *ip = GFS2_I(inode);
1491 struct gfs2_holder gh;
1492 int error;
1493
1494 if (inode->i_nlink || (sb->s_flags & MS_RDONLY))
1495 goto out;
1496
1497
1498 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh);
1499 if (unlikely(error)) {
1500 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
1501 goto out;
1502 }
1503
1504 if (!test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) {
1505 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
1506 if (error)
1507 goto out_truncate;
1508 }
1509
1510 if (test_bit(GIF_INVALID, &ip->i_flags)) {
1511 error = gfs2_inode_refresh(ip);
1512 if (error)
1513 goto out_truncate;
1514 }
1515
1516 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1517 gfs2_glock_dq_wait(&ip->i_iopen_gh);
1518 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh);
1519 error = gfs2_glock_nq(&ip->i_iopen_gh);
1520 if (error)
1521 goto out_truncate;
1522
1523
1524
1525 if (S_ISDIR(inode->i_mode) &&
1526 (ip->i_diskflags & GFS2_DIF_EXHASH)) {
1527 error = gfs2_dir_exhash_dealloc(ip);
1528 if (error)
1529 goto out_unlock;
1530 }
1531
1532 if (ip->i_eattr) {
1533 error = gfs2_ea_dealloc(ip);
1534 if (error)
1535 goto out_unlock;
1536 }
1537
1538 if (!gfs2_is_stuffed(ip)) {
1539 error = gfs2_file_dealloc(ip);
1540 if (error)
1541 goto out_unlock;
1542 }
1543
1544 error = gfs2_dinode_dealloc(ip);
1545 goto out_unlock;
1546
1547out_truncate:
1548 gfs2_log_flush(sdp, ip->i_gl);
1549 if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) {
1550 struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
1551 filemap_fdatawrite(metamapping);
1552 filemap_fdatawait(metamapping);
1553 }
1554 write_inode_now(inode, 1);
1555 gfs2_ail_flush(ip->i_gl, 0);
1556
1557
1558 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
1559 if (error)
1560 goto out_unlock;
1561
1562 truncate_inode_pages(&inode->i_data, 0);
1563 gfs2_trans_end(sdp);
1564
1565out_unlock:
1566
1567 if (gfs2_rs_active(ip->i_res))
1568 gfs2_rs_deltree(ip, ip->i_res);
1569
1570 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags))
1571 gfs2_glock_dq(&ip->i_iopen_gh);
1572 gfs2_holder_uninit(&ip->i_iopen_gh);
1573 gfs2_glock_dq_uninit(&gh);
1574 if (error && error != GLR_TRYFAILED && error != -EROFS)
1575 fs_warn(sdp, "gfs2_evict_inode: %d\n", error);
1576out:
1577
1578 truncate_inode_pages(&inode->i_data, 0);
1579 gfs2_rs_delete(ip);
1580 clear_inode(inode);
1581 gfs2_dir_hash_inval(ip);
1582 ip->i_gl->gl_object = NULL;
1583 flush_delayed_work(&ip->i_gl->gl_work);
1584 gfs2_glock_add_to_lru(ip->i_gl);
1585 gfs2_glock_put(ip->i_gl);
1586 ip->i_gl = NULL;
1587 if (ip->i_iopen_gh.gh_gl) {
1588 ip->i_iopen_gh.gh_gl->gl_object = NULL;
1589 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
1590 }
1591}
1592
1593static struct inode *gfs2_alloc_inode(struct super_block *sb)
1594{
1595 struct gfs2_inode *ip;
1596
1597 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL);
1598 if (ip) {
1599 ip->i_flags = 0;
1600 ip->i_gl = NULL;
1601 ip->i_rgd = NULL;
1602 ip->i_res = NULL;
1603 }
1604 return &ip->i_inode;
1605}
1606
1607static void gfs2_i_callback(struct rcu_head *head)
1608{
1609 struct inode *inode = container_of(head, struct inode, i_rcu);
1610 kmem_cache_free(gfs2_inode_cachep, inode);
1611}
1612
1613static void gfs2_destroy_inode(struct inode *inode)
1614{
1615 call_rcu(&inode->i_rcu, gfs2_i_callback);
1616}
1617
1618const struct super_operations gfs2_super_ops = {
1619 .alloc_inode = gfs2_alloc_inode,
1620 .destroy_inode = gfs2_destroy_inode,
1621 .write_inode = gfs2_write_inode,
1622 .dirty_inode = gfs2_dirty_inode,
1623 .evict_inode = gfs2_evict_inode,
1624 .put_super = gfs2_put_super,
1625 .sync_fs = gfs2_sync_fs,
1626 .freeze_fs = gfs2_freeze,
1627 .unfreeze_fs = gfs2_unfreeze,
1628 .statfs = gfs2_statfs,
1629 .remount_fs = gfs2_remount_fs,
1630 .drop_inode = gfs2_drop_inode,
1631 .show_options = gfs2_show_options,
1632};
1633
1634
