2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
12 #include <linux/bio.h>
13 #include <linux/sched/signal.h>
14 #include <linux/slab.h>
15 #include <linux/spinlock.h>
16 #include <linux/completion.h>
17 #include <linux/buffer_head.h>
18 #include <linux/statfs.h>
19 #include <linux/seq_file.h>
20 #include <linux/mount.h>
21 #include <linux/kthread.h>
22 #include <linux/delay.h>
23 #include <linux/gfs2_ondisk.h>
24 #include <linux/crc32.h>
25 #include <linux/time.h>
26 #include <linux/wait.h>
27 #include <linux/writeback.h>
28 #include <linux/backing-dev.h>
29 #include <linux/kernel.h>
49 #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x)
91 static const match_table_t tokens = {
92 {Opt_lockproto, "lockproto=%s"},
93 {Opt_locktable, "locktable=%s"},
94 {Opt_hostdata, "hostdata=%s"},
95 {Opt_spectator, "spectator"},
96 {Opt_spectator, "norecovery"},
97 {Opt_ignore_local_fs, "ignore_local_fs"},
98 {Opt_localflocks, "localflocks"},
99 {Opt_localcaching, "localcaching"},
100 {Opt_debug, "debug"},
101 {Opt_nodebug, "nodebug"},
102 {Opt_upgrade, "upgrade"},
104 {Opt_noacl, "noacl"},
105 {Opt_quota_off, "quota=off"},
106 {Opt_quota_account, "quota=account"},
107 {Opt_quota_on, "quota=on"},
108 {Opt_quota, "quota"},
109 {Opt_noquota, "noquota"},
110 {Opt_suiddir, "suiddir"},
111 {Opt_nosuiddir, "nosuiddir"},
112 {Opt_data_writeback, "data=writeback"},
113 {Opt_data_ordered, "data=ordered"},
115 {Opt_discard, "discard"},
116 {Opt_nodiscard, "nodiscard"},
117 {Opt_commit, "commit=%d"},
118 {Opt_err_withdraw, "errors=withdraw"},
119 {Opt_err_panic, "errors=panic"},
120 {Opt_statfs_quantum, "statfs_quantum=%d"},
121 {Opt_statfs_percent, "statfs_percent=%d"},
122 {Opt_quota_quantum, "quota_quantum=%d"},
123 {Opt_barrier, "barrier"},
124 {Opt_nobarrier, "nobarrier"},
125 {Opt_rgrplvb, "rgrplvb"},
126 {Opt_norgrplvb, "norgrplvb"},
127 {Opt_loccookie, "loccookie"},
128 {Opt_noloccookie, "noloccookie"},
133 * gfs2_mount_args - Parse mount options
134 * @args: The structure into which the parsed options will be written
135 * @options: The options to parse
140 int gfs2_mount_args(struct gfs2_args *args, char *options)
144 substring_t tmp[MAX_OPT_ARGS];
147 /* Split the options into tokens with the "," character and
151 o = strsep(&options, ",");
157 token = match_token(o, tokens, tmp);
160 match_strlcpy(args->ar_lockproto, &tmp[0],
164 match_strlcpy(args->ar_locktable, &tmp[0],
168 match_strlcpy(args->ar_hostdata, &tmp[0],
172 args->ar_spectator = 1;
174 case Opt_ignore_local_fs:
175 /* Retained for backwards compat only */
177 case Opt_localflocks:
178 args->ar_localflocks = 1;
180 case Opt_localcaching:
181 /* Retained for backwards compat only */
184 if (args->ar_errors == GFS2_ERRORS_PANIC) {
185 pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
194 /* Retained for backwards compat only */
197 args->ar_posix_acl = 1;
200 args->ar_posix_acl = 0;
204 args->ar_quota = GFS2_QUOTA_OFF;
206 case Opt_quota_account:
207 args->ar_quota = GFS2_QUOTA_ACCOUNT;
211 args->ar_quota = GFS2_QUOTA_ON;
214 args->ar_suiddir = 1;
217 args->ar_suiddir = 0;
219 case Opt_data_writeback:
220 args->ar_data = GFS2_DATA_WRITEBACK;
222 case Opt_data_ordered:
223 args->ar_data = GFS2_DATA_ORDERED;
229 args->ar_discard = 1;
232 args->ar_discard = 0;
235 rv = match_int(&tmp[0], &args->ar_commit);
236 if (rv || args->ar_commit <= 0) {
237 pr_warn("commit mount option requires a positive numeric argument\n");
238 return rv ? rv : -EINVAL;
241 case Opt_statfs_quantum:
242 rv = match_int(&tmp[0], &args->ar_statfs_quantum);
243 if (rv || args->ar_statfs_quantum < 0) {
244 pr_warn("statfs_quantum mount option requires a non-negative numeric argument\n");
245 return rv ? rv : -EINVAL;
248 case Opt_quota_quantum:
249 rv = match_int(&tmp[0], &args->ar_quota_quantum);
250 if (rv || args->ar_quota_quantum <= 0) {
251 pr_warn("quota_quantum mount option requires a positive numeric argument\n");
252 return rv ? rv : -EINVAL;
255 case Opt_statfs_percent:
256 rv = match_int(&tmp[0], &args->ar_statfs_percent);
257 if (rv || args->ar_statfs_percent < 0 ||
258 args->ar_statfs_percent > 100) {
259 pr_warn("statfs_percent mount option requires a numeric argument between 0 and 100\n");
260 return rv ? rv : -EINVAL;
263 case Opt_err_withdraw:
264 args->ar_errors = GFS2_ERRORS_WITHDRAW;
267 if (args->ar_debug) {
268 pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
271 args->ar_errors = GFS2_ERRORS_PANIC;
274 args->ar_nobarrier = 0;
277 args->ar_nobarrier = 1;
280 args->ar_rgrplvb = 1;
283 args->ar_rgrplvb = 0;
286 args->ar_loccookie = 1;
288 case Opt_noloccookie:
289 args->ar_loccookie = 0;
293 pr_warn("invalid mount option: %s\n", o);
302 * gfs2_jindex_free - Clear all the journal index information
303 * @sdp: The GFS2 superblock
307 void gfs2_jindex_free(struct gfs2_sbd *sdp)
309 struct list_head list;
310 struct gfs2_jdesc *jd;
312 spin_lock(&sdp->sd_jindex_spin);
313 list_add(&list, &sdp->sd_jindex_list);
314 list_del_init(&sdp->sd_jindex_list);
315 sdp->sd_journals = 0;
316 spin_unlock(&sdp->sd_jindex_spin);
318 while (!list_empty(&list)) {
319 jd = list_entry(list.next, struct gfs2_jdesc, jd_list);
320 gfs2_free_journal_extents(jd);
321 list_del(&jd->jd_list);
327 static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid)
329 struct gfs2_jdesc *jd;
332 list_for_each_entry(jd, head, jd_list) {
333 if (jd->jd_jid == jid) {
345 struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid)
347 struct gfs2_jdesc *jd;
349 spin_lock(&sdp->sd_jindex_spin);
350 jd = jdesc_find_i(&sdp->sd_jindex_list, jid);
351 spin_unlock(&sdp->sd_jindex_spin);
356 int gfs2_jdesc_check(struct gfs2_jdesc *jd)
358 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
359 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
360 u64 size = i_size_read(jd->jd_inode);
362 if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, BIT(30)))
365 jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift;
367 if (gfs2_write_alloc_required(ip, 0, size)) {
368 gfs2_consist_inode(ip);
375 static int init_threads(struct gfs2_sbd *sdp)
377 struct task_struct *p;
380 p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
383 fs_err(sdp, "can't start logd thread: %d\n", error);
386 sdp->sd_logd_process = p;
388 p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
391 fs_err(sdp, "can't start quotad thread: %d\n", error);
394 sdp->sd_quotad_process = p;
398 kthread_stop(sdp->sd_logd_process);
403 * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one
404 * @sdp: the filesystem
409 int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
411 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
412 struct gfs2_glock *j_gl = ip->i_gl;
413 struct gfs2_holder freeze_gh;
414 struct gfs2_log_header_host head;
417 error = init_threads(sdp);
421 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0,
426 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
428 error = gfs2_find_jhead(sdp->sd_jdesc, &head);
432 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
438 /* Initialize some head of the log stuff */
439 sdp->sd_log_sequence = head.lh_sequence + 1;
440 gfs2_log_pointers_init(sdp, head.lh_blkno);
442 error = gfs2_quota_init(sdp);
446 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
448 gfs2_glock_dq_uninit(&freeze_gh);
453 freeze_gh.gh_flags |= GL_NOCACHE;
454 gfs2_glock_dq_uninit(&freeze_gh);
456 kthread_stop(sdp->sd_quotad_process);
457 kthread_stop(sdp->sd_logd_process);
461 void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
463 const struct gfs2_statfs_change *str = buf;
465 sc->sc_total = be64_to_cpu(str->sc_total);
466 sc->sc_free = be64_to_cpu(str->sc_free);
467 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes);
470 static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
472 struct gfs2_statfs_change *str = buf;
474 str->sc_total = cpu_to_be64(sc->sc_total);
475 str->sc_free = cpu_to_be64(sc->sc_free);
476 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes);
479 int gfs2_statfs_init(struct gfs2_sbd *sdp)
481 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
482 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
483 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
484 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
485 struct buffer_head *m_bh, *l_bh;
486 struct gfs2_holder gh;
489 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
494 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
498 if (sdp->sd_args.ar_spectator) {
499 spin_lock(&sdp->sd_statfs_spin);
500 gfs2_statfs_change_in(m_sc, m_bh->b_data +
501 sizeof(struct gfs2_dinode));
502 spin_unlock(&sdp->sd_statfs_spin);
504 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
508 spin_lock(&sdp->sd_statfs_spin);
509 gfs2_statfs_change_in(m_sc, m_bh->b_data +
510 sizeof(struct gfs2_dinode));
511 gfs2_statfs_change_in(l_sc, l_bh->b_data +
512 sizeof(struct gfs2_dinode));
513 spin_unlock(&sdp->sd_statfs_spin);
521 gfs2_glock_dq_uninit(&gh);
525 void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
528 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
529 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
530 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
531 struct buffer_head *l_bh;
536 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
540 gfs2_trans_add_meta(l_ip->i_gl, l_bh);
542 spin_lock(&sdp->sd_statfs_spin);
543 l_sc->sc_total += total;
544 l_sc->sc_free += free;
545 l_sc->sc_dinodes += dinodes;
546 gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode));
547 if (sdp->sd_args.ar_statfs_percent) {
548 x = 100 * l_sc->sc_free;
549 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
550 if (x >= y || x <= -y)
553 spin_unlock(&sdp->sd_statfs_spin);
557 gfs2_wake_up_statfs(sdp);
560 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
561 struct buffer_head *l_bh)
563 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
564 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
565 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
566 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
568 gfs2_trans_add_meta(l_ip->i_gl, l_bh);
569 gfs2_trans_add_meta(m_ip->i_gl, m_bh);
571 spin_lock(&sdp->sd_statfs_spin);
572 m_sc->sc_total += l_sc->sc_total;
573 m_sc->sc_free += l_sc->sc_free;
574 m_sc->sc_dinodes += l_sc->sc_dinodes;
575 memset(l_sc, 0, sizeof(struct gfs2_statfs_change));
576 memset(l_bh->b_data + sizeof(struct gfs2_dinode),
577 0, sizeof(struct gfs2_statfs_change));
578 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
579 spin_unlock(&sdp->sd_statfs_spin);
582 int gfs2_statfs_sync(struct super_block *sb, int type)
584 struct gfs2_sbd *sdp = sb->s_fs_info;
585 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
586 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
587 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
588 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
589 struct gfs2_holder gh;
590 struct buffer_head *m_bh, *l_bh;
594 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
599 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
603 spin_lock(&sdp->sd_statfs_spin);
604 gfs2_statfs_change_in(m_sc, m_bh->b_data +
605 sizeof(struct gfs2_dinode));
606 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) {
607 spin_unlock(&sdp->sd_statfs_spin);
610 spin_unlock(&sdp->sd_statfs_spin);
612 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
616 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
620 update_statfs(sdp, m_bh, l_bh);
621 sdp->sd_statfs_force_sync = 0;
630 gfs2_glock_dq_uninit(&gh);
637 struct list_head list;
638 struct gfs2_holder gh;
642 * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all
644 * @sdp: the file system
645 * @state: the state to put the transaction lock into
646 * @t_gh: the hold on the transaction lock
651 static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
652 struct gfs2_holder *freeze_gh)
654 struct gfs2_inode *ip;
655 struct gfs2_jdesc *jd;
658 struct gfs2_log_header_host lh;
661 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
662 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL);
667 ip = GFS2_I(jd->jd_inode);
668 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh);
673 list_add(&lfcc->list, &list);
676 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE,
677 GL_NOCACHE, freeze_gh);
679 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
680 error = gfs2_jdesc_check(jd);
683 error = gfs2_find_jhead(jd, &lh);
686 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
693 gfs2_glock_dq_uninit(freeze_gh);
696 while (!list_empty(&list)) {
697 lfcc = list_entry(list.next, struct lfcc, list);
698 list_del(&lfcc->list);
699 gfs2_glock_dq_uninit(&lfcc->gh);
705 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
707 struct gfs2_dinode *str = buf;
709 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
710 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
711 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
712 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
713 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
714 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
715 str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode));
716 str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode));
717 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
718 str->di_size = cpu_to_be64(i_size_read(&ip->i_inode));
719 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
720 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
721 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
722 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
724 str->di_goal_meta = cpu_to_be64(ip->i_goal);
725 str->di_goal_data = cpu_to_be64(ip->i_goal);
726 str->di_generation = cpu_to_be64(ip->i_generation);
728 str->di_flags = cpu_to_be32(ip->i_diskflags);
729 str->di_height = cpu_to_be16(ip->i_height);
730 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
731 !(ip->i_diskflags & GFS2_DIF_EXHASH) ?
733 str->di_depth = cpu_to_be16(ip->i_depth);
734 str->di_entries = cpu_to_be32(ip->i_entries);
736 str->di_eattr = cpu_to_be64(ip->i_eattr);
737 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
738 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
739 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
743 * gfs2_write_inode - Make sure the inode is stable on the disk
745 * @wbc: The writeback control structure
750 static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
752 struct gfs2_inode *ip = GFS2_I(inode);
753 struct gfs2_sbd *sdp = GFS2_SB(inode);
754 struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
755 struct backing_dev_info *bdi = inode_to_bdi(metamapping->host);
758 if (wbc->sync_mode == WB_SYNC_ALL)
759 gfs2_log_flush(GFS2_SB(inode), ip->i_gl, NORMAL_FLUSH);
760 if (bdi->wb.dirty_exceeded)
761 gfs2_ail1_flush(sdp, wbc);
763 filemap_fdatawrite(metamapping);
764 if (wbc->sync_mode == WB_SYNC_ALL)
765 ret = filemap_fdatawait(metamapping);
767 mark_inode_dirty_sync(inode);
772 * gfs2_dirty_inode - check for atime updates
773 * @inode: The inode in question
774 * @flags: The type of dirty
776 * Unfortunately it can be called under any combination of inode
777 * glock and transaction lock, so we have to check carefully.
779 * At the moment this deals only with atime - it should be possible
780 * to expand that role in future, once a review of the locking has
784 static void gfs2_dirty_inode(struct inode *inode, int flags)
786 struct gfs2_inode *ip = GFS2_I(inode);
787 struct gfs2_sbd *sdp = GFS2_SB(inode);
788 struct buffer_head *bh;
789 struct gfs2_holder gh;
791 int need_endtrans = 0;
794 if (!(flags & (I_DIRTY_DATASYNC|I_DIRTY_SYNC)))
796 if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
798 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
799 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
801 fs_err(sdp, "dirty_inode: glock %d\n", ret);
805 } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
808 if (current->journal_info == NULL) {
809 ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
811 fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret);
817 ret = gfs2_meta_inode_buffer(ip, &bh);
819 gfs2_trans_add_meta(ip->i_gl, bh);
820 gfs2_dinode_out(ip, bh->b_data);
828 gfs2_glock_dq_uninit(&gh);
832 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
833 * @sdp: the filesystem
838 static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
840 struct gfs2_holder freeze_gh;
843 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE,
845 if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
848 kthread_stop(sdp->sd_quotad_process);
849 kthread_stop(sdp->sd_logd_process);
851 flush_workqueue(gfs2_delete_workqueue);
852 gfs2_quota_sync(sdp->sd_vfs, 0);
853 gfs2_statfs_sync(sdp->sd_vfs, 0);
855 gfs2_log_flush(sdp, NULL, SHUTDOWN_FLUSH);
856 wait_event(sdp->sd_reserving_log_wait, atomic_read(&sdp->sd_reserving_log) == 0);
857 gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks);
859 if (gfs2_holder_initialized(&freeze_gh))
860 gfs2_glock_dq_uninit(&freeze_gh);
862 gfs2_quota_cleanup(sdp);
868 * gfs2_put_super - Unmount the filesystem
869 * @sb: The VFS superblock
873 static void gfs2_put_super(struct super_block *sb)
875 struct gfs2_sbd *sdp = sb->s_fs_info;
877 struct gfs2_jdesc *jd;
879 /* No more recovery requests */
880 set_bit(SDF_NORECOVERY, &sdp->sd_flags);
883 /* Wait on outstanding recovery */
885 spin_lock(&sdp->sd_jindex_spin);
886 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
887 if (!test_bit(JDF_RECOVERY, &jd->jd_flags))
889 spin_unlock(&sdp->sd_jindex_spin);
890 wait_on_bit(&jd->jd_flags, JDF_RECOVERY,
891 TASK_UNINTERRUPTIBLE);
894 spin_unlock(&sdp->sd_jindex_spin);
896 if (!sb_rdonly(sb)) {
897 error = gfs2_make_fs_ro(sdp);
901 /* At this point, we're through modifying the disk */
905 iput(sdp->sd_jindex);
906 iput(sdp->sd_statfs_inode);
907 iput(sdp->sd_rindex);
908 iput(sdp->sd_quota_inode);
910 gfs2_glock_put(sdp->sd_rename_gl);
911 gfs2_glock_put(sdp->sd_freeze_gl);
913 if (!sdp->sd_args.ar_spectator) {
914 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
915 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
916 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
917 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
918 iput(sdp->sd_sc_inode);
919 iput(sdp->sd_qc_inode);
922 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
923 gfs2_clear_rgrpd(sdp);
924 gfs2_jindex_free(sdp);
925 /* Take apart glock structures and buffer lists */
926 gfs2_gl_hash_clear(sdp);
927 gfs2_delete_debugfs_file(sdp);
928 /* Unmount the locking protocol */
929 gfs2_lm_unmount(sdp);
931 /* At this point, we're through participating in the lockspace */
932 gfs2_sys_fs_del(sdp);
936 * gfs2_sync_fs - sync the filesystem
937 * @sb: the superblock
939 * Flushes the log to disk.
942 static int gfs2_sync_fs(struct super_block *sb, int wait)
944 struct gfs2_sbd *sdp = sb->s_fs_info;
946 gfs2_quota_sync(sb, -1);
948 gfs2_log_flush(sdp, NULL, NORMAL_FLUSH);
949 return sdp->sd_log_error;
952 void gfs2_freeze_func(struct work_struct *work)
955 struct gfs2_holder freeze_gh;
956 struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work);
957 struct super_block *sb = sdp->sd_vfs;
959 atomic_inc(&sb->s_active);
960 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0,
963 printk(KERN_INFO "GFS2: couln't get freeze lock : %d\n", error);
964 gfs2_assert_withdraw(sdp, 0);
967 atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
968 error = thaw_super(sb);
970 printk(KERN_INFO "GFS2: couldn't thaw filesystem: %d\n",
972 gfs2_assert_withdraw(sdp, 0);
974 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
975 freeze_gh.gh_flags |= GL_NOCACHE;
976 gfs2_glock_dq_uninit(&freeze_gh);
978 deactivate_super(sb);
983 * gfs2_freeze - prevent further writes to the filesystem
984 * @sb: the VFS structure for the filesystem
988 static int gfs2_freeze(struct super_block *sb)
990 struct gfs2_sbd *sdp = sb->s_fs_info;
993 mutex_lock(&sdp->sd_freeze_mutex);
994 if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN)
997 if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
1003 error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh);
1009 fs_err(sdp, "waiting for recovery before freeze\n");
1013 fs_err(sdp, "error freezing FS: %d\n", error);
1017 fs_err(sdp, "retrying...\n");
1022 mutex_unlock(&sdp->sd_freeze_mutex);
1027 * gfs2_unfreeze - reallow writes to the filesystem
1028 * @sb: the VFS structure for the filesystem
1032 static int gfs2_unfreeze(struct super_block *sb)
1034 struct gfs2_sbd *sdp = sb->s_fs_info;
1036 mutex_lock(&sdp->sd_freeze_mutex);
1037 if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN ||
1038 !gfs2_holder_initialized(&sdp->sd_freeze_gh)) {
1039 mutex_unlock(&sdp->sd_freeze_mutex);
1043 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
1044 mutex_unlock(&sdp->sd_freeze_mutex);
1049 * statfs_fill - fill in the sg for a given RG
1051 * @sc: the sc structure
1053 * Returns: 0 on success, -ESTALE if the LVB is invalid
1056 static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
1057 struct gfs2_statfs_change_host *sc)
1059 gfs2_rgrp_verify(rgd);
1060 sc->sc_total += rgd->rd_data;
1061 sc->sc_free += rgd->rd_free;
1062 sc->sc_dinodes += rgd->rd_dinodes;
1067 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking
1068 * @sdp: the filesystem
1069 * @sc: the sc info that will be returned
1071 * Any error (other than a signal) will cause this routine to fall back
1072 * to the synchronous version.
1074 * FIXME: This really shouldn't busy wait like this.
1079 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
1081 struct gfs2_rgrpd *rgd_next;
1082 struct gfs2_holder *gha, *gh;
1083 unsigned int slots = 64;
1088 memset(sc, 0, sizeof(struct gfs2_statfs_change_host));
1089 gha = kmalloc(slots * sizeof(struct gfs2_holder), GFP_KERNEL);
1092 for (x = 0; x < slots; x++)
1093 gfs2_holder_mark_uninitialized(gha + x);
1095 rgd_next = gfs2_rgrpd_get_first(sdp);
1100 for (x = 0; x < slots; x++) {
1103 if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) {
1104 err = gfs2_glock_wait(gh);
1106 gfs2_holder_uninit(gh);
1110 struct gfs2_rgrpd *rgd =
1111 gfs2_glock2rgrp(gh->gh_gl);
1113 error = statfs_slow_fill(rgd, sc);
1115 gfs2_glock_dq_uninit(gh);
1119 if (gfs2_holder_initialized(gh))
1121 else if (rgd_next && !error) {
1122 error = gfs2_glock_nq_init(rgd_next->rd_gl,
1126 rgd_next = gfs2_rgrpd_get_next(rgd_next);
1130 if (signal_pending(current))
1131 error = -ERESTARTSYS;
1145 * gfs2_statfs_i - Do a statfs
1146 * @sdp: the filesystem
1147 * @sg: the sg structure
1152 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
1154 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
1155 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
1157 spin_lock(&sdp->sd_statfs_spin);
1160 sc->sc_total += l_sc->sc_total;
1161 sc->sc_free += l_sc->sc_free;
1162 sc->sc_dinodes += l_sc->sc_dinodes;
1164 spin_unlock(&sdp->sd_statfs_spin);
1166 if (sc->sc_free < 0)
1168 if (sc->sc_free > sc->sc_total)
1169 sc->sc_free = sc->sc_total;
1170 if (sc->sc_dinodes < 0)
1177 * gfs2_statfs - Gather and return stats about the filesystem
1178 * @sb: The superblock
1179 * @statfsbuf: The buffer
1181 * Returns: 0 on success or error code
1184 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1186 struct super_block *sb = dentry->d_sb;
1187 struct gfs2_sbd *sdp = sb->s_fs_info;
1188 struct gfs2_statfs_change_host sc;
1191 error = gfs2_rindex_update(sdp);
1195 if (gfs2_tune_get(sdp, gt_statfs_slow))
1196 error = gfs2_statfs_slow(sdp, &sc);
1198 error = gfs2_statfs_i(sdp, &sc);
1203 buf->f_type = GFS2_MAGIC;
1204 buf->f_bsize = sdp->sd_sb.sb_bsize;
1205 buf->f_blocks = sc.sc_total;
1206 buf->f_bfree = sc.sc_free;
1207 buf->f_bavail = sc.sc_free;
1208 buf->f_files = sc.sc_dinodes + sc.sc_free;
1209 buf->f_ffree = sc.sc_free;
1210 buf->f_namelen = GFS2_FNAMESIZE;
1216 * gfs2_remount_fs - called when the FS is remounted
1217 * @sb: the filesystem
1218 * @flags: the remount flags
1219 * @data: extra data passed in (not used right now)
1224 static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
1226 struct gfs2_sbd *sdp = sb->s_fs_info;
1227 struct gfs2_args args = sdp->sd_args; /* Default to current settings */
1228 struct gfs2_tune *gt = &sdp->sd_tune;
1231 sync_filesystem(sb);
1233 spin_lock(>->gt_spin);
1234 args.ar_commit = gt->gt_logd_secs;
1235 args.ar_quota_quantum = gt->gt_quota_quantum;
1236 if (gt->gt_statfs_slow)
1237 args.ar_statfs_quantum = 0;
1239 args.ar_statfs_quantum = gt->gt_statfs_quantum;
1240 spin_unlock(>->gt_spin);
1241 error = gfs2_mount_args(&args, data);
1245 /* Not allowed to change locking details */
1246 if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) ||
1247 strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) ||
1248 strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata))
1251 /* Some flags must not be changed */
1252 if (args_neq(&args, &sdp->sd_args, spectator) ||
1253 args_neq(&args, &sdp->sd_args, localflocks) ||
1254 args_neq(&args, &sdp->sd_args, meta))
1257 if (sdp->sd_args.ar_spectator)
1258 *flags |= MS_RDONLY;
1260 if ((sb->s_flags ^ *flags) & MS_RDONLY) {
1261 if (*flags & MS_RDONLY)
1262 error = gfs2_make_fs_ro(sdp);
1264 error = gfs2_make_fs_rw(sdp);
1269 sdp->sd_args = args;
1270 if (sdp->sd_args.ar_posix_acl)
1271 sb->s_flags |= MS_POSIXACL;
1273 sb->s_flags &= ~MS_POSIXACL;
1274 if (sdp->sd_args.ar_nobarrier)
1275 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1277 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1278 spin_lock(>->gt_spin);
1279 gt->gt_logd_secs = args.ar_commit;
1280 gt->gt_quota_quantum = args.ar_quota_quantum;
1281 if (args.ar_statfs_quantum) {
1282 gt->gt_statfs_slow = 0;
1283 gt->gt_statfs_quantum = args.ar_statfs_quantum;
1286 gt->gt_statfs_slow = 1;
1287 gt->gt_statfs_quantum = 30;
1289 spin_unlock(>->gt_spin);
1291 gfs2_online_uevent(sdp);
1296 * gfs2_drop_inode - Drop an inode (test for remote unlink)
1297 * @inode: The inode to drop
1299 * If we've received a callback on an iopen lock then it's because a
1300 * remote node tried to deallocate the inode but failed due to this node
1301 * still having the inode open. Here we mark the link count zero
1302 * since we know that it must have reached zero if the GLF_DEMOTE flag
1303 * is set on the iopen glock. If we didn't do a disk read since the
1304 * remote node removed the final link then we might otherwise miss
1305 * this event. This check ensures that this node will deallocate the
1306 * inode's blocks, or alternatively pass the baton on to another
1307 * node for later deallocation.
1310 static int gfs2_drop_inode(struct inode *inode)
1312 struct gfs2_inode *ip = GFS2_I(inode);
1314 if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) &&
1316 gfs2_holder_initialized(&ip->i_iopen_gh)) {
1317 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1318 if (test_bit(GLF_DEMOTE, &gl->gl_flags))
1323 * When under memory pressure when an inode's link count has dropped to
1324 * zero, defer deleting the inode to the delete workqueue. This avoids
1325 * calling into DLM under memory pressure, which can deadlock.
1327 if (!inode->i_nlink &&
1328 unlikely(current->flags & PF_MEMALLOC) &&
1329 gfs2_holder_initialized(&ip->i_iopen_gh)) {
1330 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1332 gfs2_glock_hold(gl);
1333 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
1334 gfs2_glock_queue_put(gl);
1338 return generic_drop_inode(inode);
1341 static int is_ancestor(const struct dentry *d1, const struct dentry *d2)
1347 } while (!IS_ROOT(d1));
1352 * gfs2_show_options - Show mount options for /proc/mounts
1353 * @s: seq_file structure
1354 * @root: root of this (sub)tree
1356 * Returns: 0 on success or error code
1359 static int gfs2_show_options(struct seq_file *s, struct dentry *root)
1361 struct gfs2_sbd *sdp = root->d_sb->s_fs_info;
1362 struct gfs2_args *args = &sdp->sd_args;
1365 if (is_ancestor(root, sdp->sd_master_dir))
1366 seq_puts(s, ",meta");
1367 if (args->ar_lockproto[0])
1368 seq_show_option(s, "lockproto", args->ar_lockproto);
1369 if (args->ar_locktable[0])
1370 seq_show_option(s, "locktable", args->ar_locktable);
1371 if (args->ar_hostdata[0])
1372 seq_show_option(s, "hostdata", args->ar_hostdata);
1373 if (args->ar_spectator)
1374 seq_puts(s, ",spectator");
1375 if (args->ar_localflocks)
1376 seq_puts(s, ",localflocks");
1378 seq_puts(s, ",debug");
1379 if (args->ar_posix_acl)
1380 seq_puts(s, ",acl");
1381 if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
1383 switch (args->ar_quota) {
1384 case GFS2_QUOTA_OFF:
1387 case GFS2_QUOTA_ACCOUNT:
1397 seq_printf(s, ",quota=%s", state);
1399 if (args->ar_suiddir)
1400 seq_puts(s, ",suiddir");
1401 if (args->ar_data != GFS2_DATA_DEFAULT) {
1403 switch (args->ar_data) {
1404 case GFS2_DATA_WRITEBACK:
1405 state = "writeback";
1407 case GFS2_DATA_ORDERED:
1414 seq_printf(s, ",data=%s", state);
1416 if (args->ar_discard)
1417 seq_puts(s, ",discard");
1418 val = sdp->sd_tune.gt_logd_secs;
1420 seq_printf(s, ",commit=%d", val);
1421 val = sdp->sd_tune.gt_statfs_quantum;
1423 seq_printf(s, ",statfs_quantum=%d", val);
1424 else if (sdp->sd_tune.gt_statfs_slow)
1425 seq_puts(s, ",statfs_quantum=0");
1426 val = sdp->sd_tune.gt_quota_quantum;
1428 seq_printf(s, ",quota_quantum=%d", val);
1429 if (args->ar_statfs_percent)
1430 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
1431 if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
1434 switch (args->ar_errors) {
1435 case GFS2_ERRORS_WITHDRAW:
1438 case GFS2_ERRORS_PANIC:
1445 seq_printf(s, ",errors=%s", state);
1447 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
1448 seq_puts(s, ",nobarrier");
1449 if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
1450 seq_puts(s, ",demote_interface_used");
1451 if (args->ar_rgrplvb)
1452 seq_puts(s, ",rgrplvb");
1453 if (args->ar_loccookie)
1454 seq_puts(s, ",loccookie");
1458 static void gfs2_final_release_pages(struct gfs2_inode *ip)
1460 struct inode *inode = &ip->i_inode;
1461 struct gfs2_glock *gl = ip->i_gl;
1463 truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0);
1464 truncate_inode_pages(&inode->i_data, 0);
1466 if (atomic_read(&gl->gl_revokes) == 0) {
1467 clear_bit(GLF_LFLUSH, &gl->gl_flags);
1468 clear_bit(GLF_DIRTY, &gl->gl_flags);
1472 static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
1474 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1475 struct gfs2_rgrpd *rgd;
1476 struct gfs2_holder gh;
1479 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
1480 gfs2_consist_inode(ip);
1484 error = gfs2_rindex_update(sdp);
1488 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
1492 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1494 gfs2_consist_inode(ip);
1499 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
1503 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA,
1504 sdp->sd_jdesc->jd_blocks);
1506 goto out_rg_gunlock;
1508 gfs2_free_di(rgd, ip);
1510 gfs2_final_release_pages(ip);
1512 gfs2_trans_end(sdp);
1515 gfs2_glock_dq_uninit(&gh);
1517 gfs2_quota_unhold(ip);
1522 * gfs2_glock_put_eventually
1523 * @gl: The glock to put
1525 * When under memory pressure, trigger a deferred glock put to make sure we
1526 * won't call into DLM and deadlock. Otherwise, put the glock directly.
1529 static void gfs2_glock_put_eventually(struct gfs2_glock *gl)
1531 if (current->flags & PF_MEMALLOC)
1532 gfs2_glock_queue_put(gl);
1538 * gfs2_evict_inode - Remove an inode from cache
1539 * @inode: The inode to evict
1541 * There are three cases to consider:
1542 * 1. i_nlink == 0, we are final opener (and must deallocate)
1543 * 2. i_nlink == 0, we are not the final opener (and cannot deallocate)
1546 * If the fs is read only, then we have to treat all cases as per #3
1547 * since we are unable to do any deallocation. The inode will be
1548 * deallocated by the next read/write node to attempt an allocation
1549 * in the same resource group
1551 * We have to (at the moment) hold the inodes main lock to cover
1552 * the gap between unlocking the shared lock on the iopen lock and
1553 * taking the exclusive lock. I'd rather do a shared -> exclusive
1554 * conversion on the iopen lock, but we can change that later. This
1555 * is safe, just less efficient.
1558 static void gfs2_evict_inode(struct inode *inode)
1560 struct super_block *sb = inode->i_sb;
1561 struct gfs2_sbd *sdp = sb->s_fs_info;
1562 struct gfs2_inode *ip = GFS2_I(inode);
1563 struct gfs2_holder gh;
1564 struct address_space *metamapping;
1567 if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) {
1572 if (inode->i_nlink || sb_rdonly(sb))
1575 if (test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) {
1576 BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl));
1577 gfs2_holder_mark_uninitialized(&gh);
1581 /* Deletes should never happen under memory pressure anymore. */
1582 if (WARN_ON_ONCE(current->flags & PF_MEMALLOC))
1585 /* Must not read inode block until block type has been verified */
1586 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh);
1587 if (unlikely(error)) {
1588 glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
1589 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1590 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
1594 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
1598 if (test_bit(GIF_INVALID, &ip->i_flags)) {
1599 error = gfs2_inode_refresh(ip);
1605 * The inode may have been recreated in the meantime.
1611 if (gfs2_holder_initialized(&ip->i_iopen_gh) &&
1612 test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
1613 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1614 gfs2_glock_dq_wait(&ip->i_iopen_gh);
1615 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE,
1617 error = gfs2_glock_nq(&ip->i_iopen_gh);
1622 /* Case 1 starts here */
1624 if (S_ISDIR(inode->i_mode) &&
1625 (ip->i_diskflags & GFS2_DIF_EXHASH)) {
1626 error = gfs2_dir_exhash_dealloc(ip);
1632 error = gfs2_ea_dealloc(ip);
1637 if (!gfs2_is_stuffed(ip)) {
1638 error = gfs2_file_dealloc(ip);
1643 /* We're about to clear the bitmap for the dinode, but as soon as we
1644 do, gfs2_create_inode can create another inode at the same block
1645 location and try to set gl_object again. We clear gl_object here so
1646 that subsequent inode creates don't see an old gl_object. */
1647 glock_clear_object(ip->i_gl, ip);
1648 error = gfs2_dinode_dealloc(ip);
1652 gfs2_log_flush(sdp, ip->i_gl, NORMAL_FLUSH);
1653 metamapping = gfs2_glock2aspace(ip->i_gl);
1654 if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) {
1655 filemap_fdatawrite(metamapping);
1656 filemap_fdatawait(metamapping);
1658 write_inode_now(inode, 1);
1659 gfs2_ail_flush(ip->i_gl, 0);
1661 /* Case 2 starts here */
1662 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
1665 /* Needs to be done before glock release & also in a transaction */
1666 truncate_inode_pages(&inode->i_data, 0);
1667 truncate_inode_pages(metamapping, 0);
1668 gfs2_trans_end(sdp);
1671 /* Error path for case 1 */
1672 if (gfs2_rs_active(&ip->i_res))
1673 gfs2_rs_deltree(&ip->i_res);
1675 if (gfs2_holder_initialized(&ip->i_iopen_gh)) {
1676 glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
1677 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
1678 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1679 gfs2_glock_dq(&ip->i_iopen_gh);
1681 gfs2_holder_uninit(&ip->i_iopen_gh);
1683 if (gfs2_holder_initialized(&gh)) {
1684 glock_clear_object(ip->i_gl, ip);
1685 gfs2_glock_dq_uninit(&gh);
1687 if (error && error != GLR_TRYFAILED && error != -EROFS)
1688 fs_warn(sdp, "gfs2_evict_inode: %d\n", error);
1690 /* Case 3 starts here */
1691 truncate_inode_pages_final(&inode->i_data);
1692 gfs2_rsqa_delete(ip, NULL);
1693 gfs2_ordered_del_inode(ip);
1695 gfs2_dir_hash_inval(ip);
1696 glock_clear_object(ip->i_gl, ip);
1697 wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE);
1698 gfs2_glock_add_to_lru(ip->i_gl);
1699 gfs2_glock_put_eventually(ip->i_gl);
1701 if (gfs2_holder_initialized(&ip->i_iopen_gh)) {
1702 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1704 glock_clear_object(gl, ip);
1705 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1706 gfs2_glock_hold(gl);
1707 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
1708 gfs2_glock_put_eventually(gl);
1712 static struct inode *gfs2_alloc_inode(struct super_block *sb)
1714 struct gfs2_inode *ip;
1716 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL);
1721 memset(&ip->i_res, 0, sizeof(ip->i_res));
1722 RB_CLEAR_NODE(&ip->i_res.rs_node);
1725 return &ip->i_inode;
1728 static void gfs2_i_callback(struct rcu_head *head)
1730 struct inode *inode = container_of(head, struct inode, i_rcu);
1731 kmem_cache_free(gfs2_inode_cachep, inode);
1734 static void gfs2_destroy_inode(struct inode *inode)
1736 call_rcu(&inode->i_rcu, gfs2_i_callback);
1739 const struct super_operations gfs2_super_ops = {
1740 .alloc_inode = gfs2_alloc_inode,
1741 .destroy_inode = gfs2_destroy_inode,
1742 .write_inode = gfs2_write_inode,
1743 .dirty_inode = gfs2_dirty_inode,
1744 .evict_inode = gfs2_evict_inode,
1745 .put_super = gfs2_put_super,
1746 .sync_fs = gfs2_sync_fs,
1747 .freeze_super = gfs2_freeze,
1748 .thaw_super = gfs2_unfreeze,
1749 .statfs = gfs2_statfs,
1750 .remount_fs = gfs2_remount_fs,
1751 .drop_inode = gfs2_drop_inode,
1752 .show_options = gfs2_show_options,