1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/sched/signal.h>
11 #include <linux/slab.h>
12 #include <linux/spinlock.h>
13 #include <linux/completion.h>
14 #include <linux/buffer_head.h>
15 #include <linux/statfs.h>
16 #include <linux/seq_file.h>
17 #include <linux/mount.h>
18 #include <linux/kthread.h>
19 #include <linux/delay.h>
20 #include <linux/gfs2_ondisk.h>
21 #include <linux/crc32.h>
22 #include <linux/time.h>
23 #include <linux/wait.h>
24 #include <linux/writeback.h>
25 #include <linux/backing-dev.h>
26 #include <linux/kernel.h>
47 #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x)
89 static const match_table_t tokens = {
90 {Opt_lockproto, "lockproto=%s"},
91 {Opt_locktable, "locktable=%s"},
92 {Opt_hostdata, "hostdata=%s"},
93 {Opt_spectator, "spectator"},
94 {Opt_spectator, "norecovery"},
95 {Opt_ignore_local_fs, "ignore_local_fs"},
96 {Opt_localflocks, "localflocks"},
97 {Opt_localcaching, "localcaching"},
99 {Opt_nodebug, "nodebug"},
100 {Opt_upgrade, "upgrade"},
102 {Opt_noacl, "noacl"},
103 {Opt_quota_off, "quota=off"},
104 {Opt_quota_account, "quota=account"},
105 {Opt_quota_on, "quota=on"},
106 {Opt_quota, "quota"},
107 {Opt_noquota, "noquota"},
108 {Opt_suiddir, "suiddir"},
109 {Opt_nosuiddir, "nosuiddir"},
110 {Opt_data_writeback, "data=writeback"},
111 {Opt_data_ordered, "data=ordered"},
113 {Opt_discard, "discard"},
114 {Opt_nodiscard, "nodiscard"},
115 {Opt_commit, "commit=%d"},
116 {Opt_err_withdraw, "errors=withdraw"},
117 {Opt_err_panic, "errors=panic"},
118 {Opt_statfs_quantum, "statfs_quantum=%d"},
119 {Opt_statfs_percent, "statfs_percent=%d"},
120 {Opt_quota_quantum, "quota_quantum=%d"},
121 {Opt_barrier, "barrier"},
122 {Opt_nobarrier, "nobarrier"},
123 {Opt_rgrplvb, "rgrplvb"},
124 {Opt_norgrplvb, "norgrplvb"},
125 {Opt_loccookie, "loccookie"},
126 {Opt_noloccookie, "noloccookie"},
131 * gfs2_mount_args - Parse mount options
132 * @args: The structure into which the parsed options will be written
133 * @options: The options to parse
138 int gfs2_mount_args(struct gfs2_args *args, char *options)
142 substring_t tmp[MAX_OPT_ARGS];
145 /* Split the options into tokens with the "," character and
149 o = strsep(&options, ",");
155 token = match_token(o, tokens, tmp);
158 match_strlcpy(args->ar_lockproto, &tmp[0],
162 match_strlcpy(args->ar_locktable, &tmp[0],
166 match_strlcpy(args->ar_hostdata, &tmp[0],
170 args->ar_spectator = 1;
172 case Opt_ignore_local_fs:
173 /* Retained for backwards compat only */
175 case Opt_localflocks:
176 args->ar_localflocks = 1;
178 case Opt_localcaching:
179 /* Retained for backwards compat only */
182 if (args->ar_errors == GFS2_ERRORS_PANIC) {
183 pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
192 /* Retained for backwards compat only */
195 args->ar_posix_acl = 1;
198 args->ar_posix_acl = 0;
202 args->ar_quota = GFS2_QUOTA_OFF;
204 case Opt_quota_account:
205 args->ar_quota = GFS2_QUOTA_ACCOUNT;
209 args->ar_quota = GFS2_QUOTA_ON;
212 args->ar_suiddir = 1;
215 args->ar_suiddir = 0;
217 case Opt_data_writeback:
218 args->ar_data = GFS2_DATA_WRITEBACK;
220 case Opt_data_ordered:
221 args->ar_data = GFS2_DATA_ORDERED;
227 args->ar_discard = 1;
230 args->ar_discard = 0;
233 rv = match_int(&tmp[0], &args->ar_commit);
234 if (rv || args->ar_commit <= 0) {
235 pr_warn("commit mount option requires a positive numeric argument\n");
236 return rv ? rv : -EINVAL;
239 case Opt_statfs_quantum:
240 rv = match_int(&tmp[0], &args->ar_statfs_quantum);
241 if (rv || args->ar_statfs_quantum < 0) {
242 pr_warn("statfs_quantum mount option requires a non-negative numeric argument\n");
243 return rv ? rv : -EINVAL;
246 case Opt_quota_quantum:
247 rv = match_int(&tmp[0], &args->ar_quota_quantum);
248 if (rv || args->ar_quota_quantum <= 0) {
249 pr_warn("quota_quantum mount option requires a positive numeric argument\n");
250 return rv ? rv : -EINVAL;
253 case Opt_statfs_percent:
254 rv = match_int(&tmp[0], &args->ar_statfs_percent);
255 if (rv || args->ar_statfs_percent < 0 ||
256 args->ar_statfs_percent > 100) {
257 pr_warn("statfs_percent mount option requires a numeric argument between 0 and 100\n");
258 return rv ? rv : -EINVAL;
261 case Opt_err_withdraw:
262 args->ar_errors = GFS2_ERRORS_WITHDRAW;
265 if (args->ar_debug) {
266 pr_warn("-o debug and -o errors=panic are mutually exclusive\n");
269 args->ar_errors = GFS2_ERRORS_PANIC;
272 args->ar_nobarrier = 0;
275 args->ar_nobarrier = 1;
278 args->ar_rgrplvb = 1;
281 args->ar_rgrplvb = 0;
284 args->ar_loccookie = 1;
286 case Opt_noloccookie:
287 args->ar_loccookie = 0;
291 pr_warn("invalid mount option: %s\n", o);
300 * gfs2_jindex_free - Clear all the journal index information
301 * @sdp: The GFS2 superblock
305 void gfs2_jindex_free(struct gfs2_sbd *sdp)
307 struct list_head list;
308 struct gfs2_jdesc *jd;
310 spin_lock(&sdp->sd_jindex_spin);
311 list_add(&list, &sdp->sd_jindex_list);
312 list_del_init(&sdp->sd_jindex_list);
313 sdp->sd_journals = 0;
314 spin_unlock(&sdp->sd_jindex_spin);
316 while (!list_empty(&list)) {
317 jd = list_entry(list.next, struct gfs2_jdesc, jd_list);
318 gfs2_free_journal_extents(jd);
319 list_del(&jd->jd_list);
325 static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid)
327 struct gfs2_jdesc *jd;
330 list_for_each_entry(jd, head, jd_list) {
331 if (jd->jd_jid == jid) {
343 struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid)
345 struct gfs2_jdesc *jd;
347 spin_lock(&sdp->sd_jindex_spin);
348 jd = jdesc_find_i(&sdp->sd_jindex_list, jid);
349 spin_unlock(&sdp->sd_jindex_spin);
354 int gfs2_jdesc_check(struct gfs2_jdesc *jd)
356 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
357 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
358 u64 size = i_size_read(jd->jd_inode);
360 if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, BIT(30)))
363 jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift;
365 if (gfs2_write_alloc_required(ip, 0, size)) {
366 gfs2_consist_inode(ip);
373 static int init_threads(struct gfs2_sbd *sdp)
375 struct task_struct *p;
378 p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
381 fs_err(sdp, "can't start logd thread: %d\n", error);
384 sdp->sd_logd_process = p;
386 p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
389 fs_err(sdp, "can't start quotad thread: %d\n", error);
392 sdp->sd_quotad_process = p;
396 kthread_stop(sdp->sd_logd_process);
397 sdp->sd_logd_process = NULL;
402 * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one
403 * @sdp: the filesystem
408 int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
410 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
411 struct gfs2_glock *j_gl = ip->i_gl;
412 struct gfs2_holder freeze_gh;
413 struct gfs2_log_header_host head;
416 error = init_threads(sdp);
420 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0,
425 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
427 error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
431 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
437 /* Initialize some head of the log stuff */
438 sdp->sd_log_sequence = head.lh_sequence + 1;
439 gfs2_log_pointers_init(sdp, head.lh_blkno);
441 error = gfs2_quota_init(sdp);
445 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
447 gfs2_glock_dq_uninit(&freeze_gh);
452 freeze_gh.gh_flags |= GL_NOCACHE;
453 gfs2_glock_dq_uninit(&freeze_gh);
455 if (sdp->sd_quotad_process)
456 kthread_stop(sdp->sd_quotad_process);
457 sdp->sd_quotad_process = NULL;
458 if (sdp->sd_logd_process)
459 kthread_stop(sdp->sd_logd_process);
460 sdp->sd_logd_process = NULL;
464 void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
466 const struct gfs2_statfs_change *str = buf;
468 sc->sc_total = be64_to_cpu(str->sc_total);
469 sc->sc_free = be64_to_cpu(str->sc_free);
470 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes);
473 static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
475 struct gfs2_statfs_change *str = buf;
477 str->sc_total = cpu_to_be64(sc->sc_total);
478 str->sc_free = cpu_to_be64(sc->sc_free);
479 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes);
482 int gfs2_statfs_init(struct gfs2_sbd *sdp)
484 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
485 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
486 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
487 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
488 struct buffer_head *m_bh, *l_bh;
489 struct gfs2_holder gh;
492 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
497 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
501 if (sdp->sd_args.ar_spectator) {
502 spin_lock(&sdp->sd_statfs_spin);
503 gfs2_statfs_change_in(m_sc, m_bh->b_data +
504 sizeof(struct gfs2_dinode));
505 spin_unlock(&sdp->sd_statfs_spin);
507 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
511 spin_lock(&sdp->sd_statfs_spin);
512 gfs2_statfs_change_in(m_sc, m_bh->b_data +
513 sizeof(struct gfs2_dinode));
514 gfs2_statfs_change_in(l_sc, l_bh->b_data +
515 sizeof(struct gfs2_dinode));
516 spin_unlock(&sdp->sd_statfs_spin);
524 gfs2_glock_dq_uninit(&gh);
528 void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
531 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
532 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
533 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
534 struct buffer_head *l_bh;
539 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
543 gfs2_trans_add_meta(l_ip->i_gl, l_bh);
545 spin_lock(&sdp->sd_statfs_spin);
546 l_sc->sc_total += total;
547 l_sc->sc_free += free;
548 l_sc->sc_dinodes += dinodes;
549 gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode));
550 if (sdp->sd_args.ar_statfs_percent) {
551 x = 100 * l_sc->sc_free;
552 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
553 if (x >= y || x <= -y)
556 spin_unlock(&sdp->sd_statfs_spin);
560 gfs2_wake_up_statfs(sdp);
563 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
564 struct buffer_head *l_bh)
566 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
567 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
568 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
569 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
571 gfs2_trans_add_meta(l_ip->i_gl, l_bh);
572 gfs2_trans_add_meta(m_ip->i_gl, m_bh);
574 spin_lock(&sdp->sd_statfs_spin);
575 m_sc->sc_total += l_sc->sc_total;
576 m_sc->sc_free += l_sc->sc_free;
577 m_sc->sc_dinodes += l_sc->sc_dinodes;
578 memset(l_sc, 0, sizeof(struct gfs2_statfs_change));
579 memset(l_bh->b_data + sizeof(struct gfs2_dinode),
580 0, sizeof(struct gfs2_statfs_change));
581 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
582 spin_unlock(&sdp->sd_statfs_spin);
585 int gfs2_statfs_sync(struct super_block *sb, int type)
587 struct gfs2_sbd *sdp = sb->s_fs_info;
588 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
589 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
590 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
591 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
592 struct gfs2_holder gh;
593 struct buffer_head *m_bh, *l_bh;
597 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
602 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
606 spin_lock(&sdp->sd_statfs_spin);
607 gfs2_statfs_change_in(m_sc, m_bh->b_data +
608 sizeof(struct gfs2_dinode));
609 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) {
610 spin_unlock(&sdp->sd_statfs_spin);
613 spin_unlock(&sdp->sd_statfs_spin);
615 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
619 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
623 update_statfs(sdp, m_bh, l_bh);
624 sdp->sd_statfs_force_sync = 0;
633 gfs2_glock_dq_uninit(&gh);
640 struct list_head list;
641 struct gfs2_holder gh;
645 * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all
647 * @sdp: the file system
648 * @state: the state to put the transaction lock into
649 * @t_gh: the hold on the transaction lock
654 static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
655 struct gfs2_holder *freeze_gh)
657 struct gfs2_inode *ip;
658 struct gfs2_jdesc *jd;
661 struct gfs2_log_header_host lh;
664 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
665 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL);
670 ip = GFS2_I(jd->jd_inode);
671 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh);
676 list_add(&lfcc->list, &list);
679 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE,
680 GL_NOCACHE, freeze_gh);
682 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
683 error = gfs2_jdesc_check(jd);
686 error = gfs2_find_jhead(jd, &lh, false);
689 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
696 gfs2_glock_dq_uninit(freeze_gh);
699 while (!list_empty(&list)) {
700 lfcc = list_entry(list.next, struct lfcc, list);
701 list_del(&lfcc->list);
702 gfs2_glock_dq_uninit(&lfcc->gh);
708 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
710 struct gfs2_dinode *str = buf;
712 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
713 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
714 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
715 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
716 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
717 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
718 str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode));
719 str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode));
720 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
721 str->di_size = cpu_to_be64(i_size_read(&ip->i_inode));
722 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
723 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
724 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
725 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
727 str->di_goal_meta = cpu_to_be64(ip->i_goal);
728 str->di_goal_data = cpu_to_be64(ip->i_goal);
729 str->di_generation = cpu_to_be64(ip->i_generation);
731 str->di_flags = cpu_to_be32(ip->i_diskflags);
732 str->di_height = cpu_to_be16(ip->i_height);
733 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
734 !(ip->i_diskflags & GFS2_DIF_EXHASH) ?
736 str->di_depth = cpu_to_be16(ip->i_depth);
737 str->di_entries = cpu_to_be32(ip->i_entries);
739 str->di_eattr = cpu_to_be64(ip->i_eattr);
740 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
741 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
742 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
746 * gfs2_write_inode - Make sure the inode is stable on the disk
748 * @wbc: The writeback control structure
753 static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
755 struct gfs2_inode *ip = GFS2_I(inode);
756 struct gfs2_sbd *sdp = GFS2_SB(inode);
757 struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
758 struct backing_dev_info *bdi = inode_to_bdi(metamapping->host);
760 bool flush_all = (wbc->sync_mode == WB_SYNC_ALL || gfs2_is_jdata(ip));
763 gfs2_log_flush(GFS2_SB(inode), ip->i_gl,
764 GFS2_LOG_HEAD_FLUSH_NORMAL |
765 GFS2_LFC_WRITE_INODE);
766 if (bdi->wb.dirty_exceeded)
767 gfs2_ail1_flush(sdp, wbc);
769 filemap_fdatawrite(metamapping);
771 ret = filemap_fdatawait(metamapping);
773 mark_inode_dirty_sync(inode);
775 spin_lock(&inode->i_lock);
776 if (!(inode->i_flags & I_DIRTY))
777 gfs2_ordered_del_inode(ip);
778 spin_unlock(&inode->i_lock);
784 * gfs2_dirty_inode - check for atime updates
785 * @inode: The inode in question
786 * @flags: The type of dirty
788 * Unfortunately it can be called under any combination of inode
789 * glock and transaction lock, so we have to check carefully.
791 * At the moment this deals only with atime - it should be possible
792 * to expand that role in future, once a review of the locking has
796 static void gfs2_dirty_inode(struct inode *inode, int flags)
798 struct gfs2_inode *ip = GFS2_I(inode);
799 struct gfs2_sbd *sdp = GFS2_SB(inode);
800 struct buffer_head *bh;
801 struct gfs2_holder gh;
803 int need_endtrans = 0;
806 if (!(flags & I_DIRTY_INODE))
808 if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags)))
810 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
811 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
813 fs_err(sdp, "dirty_inode: glock %d\n", ret);
817 } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
820 if (current->journal_info == NULL) {
821 ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
823 fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret);
829 ret = gfs2_meta_inode_buffer(ip, &bh);
831 gfs2_trans_add_meta(ip->i_gl, bh);
832 gfs2_dinode_out(ip, bh->b_data);
840 gfs2_glock_dq_uninit(&gh);
844 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
845 * @sdp: the filesystem
850 static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
852 struct gfs2_holder freeze_gh;
855 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE,
857 if (error && !test_bit(SDF_WITHDRAWN, &sdp->sd_flags))
860 flush_workqueue(gfs2_delete_workqueue);
861 if (sdp->sd_quotad_process)
862 kthread_stop(sdp->sd_quotad_process);
863 sdp->sd_quotad_process = NULL;
864 if (sdp->sd_logd_process)
865 kthread_stop(sdp->sd_logd_process);
866 sdp->sd_logd_process = NULL;
868 gfs2_quota_sync(sdp->sd_vfs, 0);
869 gfs2_statfs_sync(sdp->sd_vfs, 0);
871 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN |
872 GFS2_LFC_MAKE_FS_RO);
873 wait_event(sdp->sd_reserving_log_wait, atomic_read(&sdp->sd_reserving_log) == 0);
874 gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) == sdp->sd_jdesc->jd_blocks);
876 if (gfs2_holder_initialized(&freeze_gh))
877 gfs2_glock_dq_uninit(&freeze_gh);
879 gfs2_quota_cleanup(sdp);
885 * gfs2_put_super - Unmount the filesystem
886 * @sb: The VFS superblock
890 static void gfs2_put_super(struct super_block *sb)
892 struct gfs2_sbd *sdp = sb->s_fs_info;
894 struct gfs2_jdesc *jd;
896 /* No more recovery requests */
897 set_bit(SDF_NORECOVERY, &sdp->sd_flags);
900 /* Wait on outstanding recovery */
902 spin_lock(&sdp->sd_jindex_spin);
903 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
904 if (!test_bit(JDF_RECOVERY, &jd->jd_flags))
906 spin_unlock(&sdp->sd_jindex_spin);
907 wait_on_bit(&jd->jd_flags, JDF_RECOVERY,
908 TASK_UNINTERRUPTIBLE);
911 spin_unlock(&sdp->sd_jindex_spin);
913 if (!sb_rdonly(sb)) {
914 error = gfs2_make_fs_ro(sdp);
918 /* At this point, we're through modifying the disk */
922 iput(sdp->sd_jindex);
923 iput(sdp->sd_statfs_inode);
924 iput(sdp->sd_rindex);
925 iput(sdp->sd_quota_inode);
927 gfs2_glock_put(sdp->sd_rename_gl);
928 gfs2_glock_put(sdp->sd_freeze_gl);
930 if (!sdp->sd_args.ar_spectator) {
931 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
932 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
933 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
934 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
935 iput(sdp->sd_sc_inode);
936 iput(sdp->sd_qc_inode);
939 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
940 gfs2_clear_rgrpd(sdp);
941 gfs2_jindex_free(sdp);
942 /* Take apart glock structures and buffer lists */
943 gfs2_gl_hash_clear(sdp);
944 gfs2_delete_debugfs_file(sdp);
945 /* Unmount the locking protocol */
946 gfs2_lm_unmount(sdp);
948 /* At this point, we're through participating in the lockspace */
949 gfs2_sys_fs_del(sdp);
953 * gfs2_sync_fs - sync the filesystem
954 * @sb: the superblock
956 * Flushes the log to disk.
959 static int gfs2_sync_fs(struct super_block *sb, int wait)
961 struct gfs2_sbd *sdp = sb->s_fs_info;
963 gfs2_quota_sync(sb, -1);
965 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
967 return sdp->sd_log_error;
970 void gfs2_freeze_func(struct work_struct *work)
973 struct gfs2_holder freeze_gh;
974 struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work);
975 struct super_block *sb = sdp->sd_vfs;
977 atomic_inc(&sb->s_active);
978 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0,
981 fs_info(sdp, "GFS2: couldn't get freeze lock : %d\n", error);
982 gfs2_assert_withdraw(sdp, 0);
984 atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
985 error = thaw_super(sb);
987 fs_info(sdp, "GFS2: couldn't thaw filesystem: %d\n",
989 gfs2_assert_withdraw(sdp, 0);
991 if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
992 freeze_gh.gh_flags |= GL_NOCACHE;
993 gfs2_glock_dq_uninit(&freeze_gh);
995 deactivate_super(sb);
996 clear_bit_unlock(SDF_FS_FROZEN, &sdp->sd_flags);
997 wake_up_bit(&sdp->sd_flags, SDF_FS_FROZEN);
1002 * gfs2_freeze - prevent further writes to the filesystem
1003 * @sb: the VFS structure for the filesystem
1007 static int gfs2_freeze(struct super_block *sb)
1009 struct gfs2_sbd *sdp = sb->s_fs_info;
1012 mutex_lock(&sdp->sd_freeze_mutex);
1013 if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN)
1016 if (test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) {
1022 error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh);
1026 if (error == -EBUSY)
1027 fs_err(sdp, "waiting for recovery before freeze\n");
1029 fs_err(sdp, "error freezing FS: %d\n", error);
1031 fs_err(sdp, "retrying...\n");
1034 set_bit(SDF_FS_FROZEN, &sdp->sd_flags);
1036 mutex_unlock(&sdp->sd_freeze_mutex);
1041 * gfs2_unfreeze - reallow writes to the filesystem
1042 * @sb: the VFS structure for the filesystem
1046 static int gfs2_unfreeze(struct super_block *sb)
1048 struct gfs2_sbd *sdp = sb->s_fs_info;
1050 mutex_lock(&sdp->sd_freeze_mutex);
1051 if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN ||
1052 !gfs2_holder_initialized(&sdp->sd_freeze_gh)) {
1053 mutex_unlock(&sdp->sd_freeze_mutex);
1057 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
1058 mutex_unlock(&sdp->sd_freeze_mutex);
1059 return wait_on_bit(&sdp->sd_flags, SDF_FS_FROZEN, TASK_INTERRUPTIBLE);
1063 * statfs_fill - fill in the sg for a given RG
1065 * @sc: the sc structure
1067 * Returns: 0 on success, -ESTALE if the LVB is invalid
1070 static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
1071 struct gfs2_statfs_change_host *sc)
1073 gfs2_rgrp_verify(rgd);
1074 sc->sc_total += rgd->rd_data;
1075 sc->sc_free += rgd->rd_free;
1076 sc->sc_dinodes += rgd->rd_dinodes;
1081 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking
1082 * @sdp: the filesystem
1083 * @sc: the sc info that will be returned
1085 * Any error (other than a signal) will cause this routine to fall back
1086 * to the synchronous version.
1088 * FIXME: This really shouldn't busy wait like this.
1093 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
1095 struct gfs2_rgrpd *rgd_next;
1096 struct gfs2_holder *gha, *gh;
1097 unsigned int slots = 64;
1102 memset(sc, 0, sizeof(struct gfs2_statfs_change_host));
1103 gha = kmalloc_array(slots, sizeof(struct gfs2_holder), GFP_KERNEL);
1106 for (x = 0; x < slots; x++)
1107 gfs2_holder_mark_uninitialized(gha + x);
1109 rgd_next = gfs2_rgrpd_get_first(sdp);
1114 for (x = 0; x < slots; x++) {
1117 if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) {
1118 err = gfs2_glock_wait(gh);
1120 gfs2_holder_uninit(gh);
1124 struct gfs2_rgrpd *rgd =
1125 gfs2_glock2rgrp(gh->gh_gl);
1127 error = statfs_slow_fill(rgd, sc);
1129 gfs2_glock_dq_uninit(gh);
1133 if (gfs2_holder_initialized(gh))
1135 else if (rgd_next && !error) {
1136 error = gfs2_glock_nq_init(rgd_next->rd_gl,
1140 rgd_next = gfs2_rgrpd_get_next(rgd_next);
1144 if (signal_pending(current))
1145 error = -ERESTARTSYS;
1159 * gfs2_statfs_i - Do a statfs
1160 * @sdp: the filesystem
1161 * @sg: the sg structure
1166 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
1168 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
1169 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
1171 spin_lock(&sdp->sd_statfs_spin);
1174 sc->sc_total += l_sc->sc_total;
1175 sc->sc_free += l_sc->sc_free;
1176 sc->sc_dinodes += l_sc->sc_dinodes;
1178 spin_unlock(&sdp->sd_statfs_spin);
1180 if (sc->sc_free < 0)
1182 if (sc->sc_free > sc->sc_total)
1183 sc->sc_free = sc->sc_total;
1184 if (sc->sc_dinodes < 0)
1191 * gfs2_statfs - Gather and return stats about the filesystem
1192 * @sb: The superblock
1193 * @statfsbuf: The buffer
1195 * Returns: 0 on success or error code
1198 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
1200 struct super_block *sb = dentry->d_sb;
1201 struct gfs2_sbd *sdp = sb->s_fs_info;
1202 struct gfs2_statfs_change_host sc;
1205 error = gfs2_rindex_update(sdp);
1209 if (gfs2_tune_get(sdp, gt_statfs_slow))
1210 error = gfs2_statfs_slow(sdp, &sc);
1212 error = gfs2_statfs_i(sdp, &sc);
1217 buf->f_type = GFS2_MAGIC;
1218 buf->f_bsize = sdp->sd_sb.sb_bsize;
1219 buf->f_blocks = sc.sc_total;
1220 buf->f_bfree = sc.sc_free;
1221 buf->f_bavail = sc.sc_free;
1222 buf->f_files = sc.sc_dinodes + sc.sc_free;
1223 buf->f_ffree = sc.sc_free;
1224 buf->f_namelen = GFS2_FNAMESIZE;
1230 * gfs2_remount_fs - called when the FS is remounted
1231 * @sb: the filesystem
1232 * @flags: the remount flags
1233 * @data: extra data passed in (not used right now)
1238 static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
1240 struct gfs2_sbd *sdp = sb->s_fs_info;
1241 struct gfs2_args args = sdp->sd_args; /* Default to current settings */
1242 struct gfs2_tune *gt = &sdp->sd_tune;
1245 sync_filesystem(sb);
1247 spin_lock(>->gt_spin);
1248 args.ar_commit = gt->gt_logd_secs;
1249 args.ar_quota_quantum = gt->gt_quota_quantum;
1250 if (gt->gt_statfs_slow)
1251 args.ar_statfs_quantum = 0;
1253 args.ar_statfs_quantum = gt->gt_statfs_quantum;
1254 spin_unlock(>->gt_spin);
1255 error = gfs2_mount_args(&args, data);
1259 /* Not allowed to change locking details */
1260 if (strcmp(args.ar_lockproto, sdp->sd_args.ar_lockproto) ||
1261 strcmp(args.ar_locktable, sdp->sd_args.ar_locktable) ||
1262 strcmp(args.ar_hostdata, sdp->sd_args.ar_hostdata))
1265 /* Some flags must not be changed */
1266 if (args_neq(&args, &sdp->sd_args, spectator) ||
1267 args_neq(&args, &sdp->sd_args, localflocks) ||
1268 args_neq(&args, &sdp->sd_args, meta))
1271 if (sdp->sd_args.ar_spectator)
1272 *flags |= SB_RDONLY;
1274 if ((sb->s_flags ^ *flags) & SB_RDONLY) {
1275 if (*flags & SB_RDONLY)
1276 error = gfs2_make_fs_ro(sdp);
1278 error = gfs2_make_fs_rw(sdp);
1281 sdp->sd_args = args;
1282 if (sdp->sd_args.ar_posix_acl)
1283 sb->s_flags |= SB_POSIXACL;
1285 sb->s_flags &= ~SB_POSIXACL;
1286 if (sdp->sd_args.ar_nobarrier)
1287 set_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1289 clear_bit(SDF_NOBARRIERS, &sdp->sd_flags);
1290 spin_lock(>->gt_spin);
1291 gt->gt_logd_secs = args.ar_commit;
1292 gt->gt_quota_quantum = args.ar_quota_quantum;
1293 if (args.ar_statfs_quantum) {
1294 gt->gt_statfs_slow = 0;
1295 gt->gt_statfs_quantum = args.ar_statfs_quantum;
1298 gt->gt_statfs_slow = 1;
1299 gt->gt_statfs_quantum = 30;
1301 spin_unlock(>->gt_spin);
1303 gfs2_online_uevent(sdp);
1308 * gfs2_drop_inode - Drop an inode (test for remote unlink)
1309 * @inode: The inode to drop
1311 * If we've received a callback on an iopen lock then it's because a
1312 * remote node tried to deallocate the inode but failed due to this node
1313 * still having the inode open. Here we mark the link count zero
1314 * since we know that it must have reached zero if the GLF_DEMOTE flag
1315 * is set on the iopen glock. If we didn't do a disk read since the
1316 * remote node removed the final link then we might otherwise miss
1317 * this event. This check ensures that this node will deallocate the
1318 * inode's blocks, or alternatively pass the baton on to another
1319 * node for later deallocation.
1322 static int gfs2_drop_inode(struct inode *inode)
1324 struct gfs2_inode *ip = GFS2_I(inode);
1326 if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) &&
1328 gfs2_holder_initialized(&ip->i_iopen_gh)) {
1329 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1330 if (test_bit(GLF_DEMOTE, &gl->gl_flags))
1335 * When under memory pressure when an inode's link count has dropped to
1336 * zero, defer deleting the inode to the delete workqueue. This avoids
1337 * calling into DLM under memory pressure, which can deadlock.
1339 if (!inode->i_nlink &&
1340 unlikely(current->flags & PF_MEMALLOC) &&
1341 gfs2_holder_initialized(&ip->i_iopen_gh)) {
1342 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1344 gfs2_glock_hold(gl);
1345 if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
1346 gfs2_glock_queue_put(gl);
1350 return generic_drop_inode(inode);
1353 static int is_ancestor(const struct dentry *d1, const struct dentry *d2)
1359 } while (!IS_ROOT(d1));
1364 * gfs2_show_options - Show mount options for /proc/mounts
1365 * @s: seq_file structure
1366 * @root: root of this (sub)tree
1368 * Returns: 0 on success or error code
1371 static int gfs2_show_options(struct seq_file *s, struct dentry *root)
1373 struct gfs2_sbd *sdp = root->d_sb->s_fs_info;
1374 struct gfs2_args *args = &sdp->sd_args;
1377 if (is_ancestor(root, sdp->sd_master_dir))
1378 seq_puts(s, ",meta");
1379 if (args->ar_lockproto[0])
1380 seq_show_option(s, "lockproto", args->ar_lockproto);
1381 if (args->ar_locktable[0])
1382 seq_show_option(s, "locktable", args->ar_locktable);
1383 if (args->ar_hostdata[0])
1384 seq_show_option(s, "hostdata", args->ar_hostdata);
1385 if (args->ar_spectator)
1386 seq_puts(s, ",spectator");
1387 if (args->ar_localflocks)
1388 seq_puts(s, ",localflocks");
1390 seq_puts(s, ",debug");
1391 if (args->ar_posix_acl)
1392 seq_puts(s, ",acl");
1393 if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
1395 switch (args->ar_quota) {
1396 case GFS2_QUOTA_OFF:
1399 case GFS2_QUOTA_ACCOUNT:
1409 seq_printf(s, ",quota=%s", state);
1411 if (args->ar_suiddir)
1412 seq_puts(s, ",suiddir");
1413 if (args->ar_data != GFS2_DATA_DEFAULT) {
1415 switch (args->ar_data) {
1416 case GFS2_DATA_WRITEBACK:
1417 state = "writeback";
1419 case GFS2_DATA_ORDERED:
1426 seq_printf(s, ",data=%s", state);
1428 if (args->ar_discard)
1429 seq_puts(s, ",discard");
1430 val = sdp->sd_tune.gt_logd_secs;
1432 seq_printf(s, ",commit=%d", val);
1433 val = sdp->sd_tune.gt_statfs_quantum;
1435 seq_printf(s, ",statfs_quantum=%d", val);
1436 else if (sdp->sd_tune.gt_statfs_slow)
1437 seq_puts(s, ",statfs_quantum=0");
1438 val = sdp->sd_tune.gt_quota_quantum;
1440 seq_printf(s, ",quota_quantum=%d", val);
1441 if (args->ar_statfs_percent)
1442 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
1443 if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
1446 switch (args->ar_errors) {
1447 case GFS2_ERRORS_WITHDRAW:
1450 case GFS2_ERRORS_PANIC:
1457 seq_printf(s, ",errors=%s", state);
1459 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
1460 seq_puts(s, ",nobarrier");
1461 if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
1462 seq_puts(s, ",demote_interface_used");
1463 if (args->ar_rgrplvb)
1464 seq_puts(s, ",rgrplvb");
1465 if (args->ar_loccookie)
1466 seq_puts(s, ",loccookie");
1470 static void gfs2_final_release_pages(struct gfs2_inode *ip)
1472 struct inode *inode = &ip->i_inode;
1473 struct gfs2_glock *gl = ip->i_gl;
1475 truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0);
1476 truncate_inode_pages(&inode->i_data, 0);
1478 if (atomic_read(&gl->gl_revokes) == 0) {
1479 clear_bit(GLF_LFLUSH, &gl->gl_flags);
1480 clear_bit(GLF_DIRTY, &gl->gl_flags);
1484 static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
1486 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1487 struct gfs2_rgrpd *rgd;
1488 struct gfs2_holder gh;
1491 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
1492 gfs2_consist_inode(ip);
1496 error = gfs2_rindex_update(sdp);
1500 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
1504 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1506 gfs2_consist_inode(ip);
1511 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
1515 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA,
1516 sdp->sd_jdesc->jd_blocks);
1518 goto out_rg_gunlock;
1520 gfs2_free_di(rgd, ip);
1522 gfs2_final_release_pages(ip);
1524 gfs2_trans_end(sdp);
1527 gfs2_glock_dq_uninit(&gh);
1529 gfs2_quota_unhold(ip);
1534 * gfs2_glock_put_eventually
1535 * @gl: The glock to put
1537 * When under memory pressure, trigger a deferred glock put to make sure we
1538 * won't call into DLM and deadlock. Otherwise, put the glock directly.
1541 static void gfs2_glock_put_eventually(struct gfs2_glock *gl)
1543 if (current->flags & PF_MEMALLOC)
1544 gfs2_glock_queue_put(gl);
1550 * gfs2_evict_inode - Remove an inode from cache
1551 * @inode: The inode to evict
1553 * There are three cases to consider:
1554 * 1. i_nlink == 0, we are final opener (and must deallocate)
1555 * 2. i_nlink == 0, we are not the final opener (and cannot deallocate)
1558 * If the fs is read only, then we have to treat all cases as per #3
1559 * since we are unable to do any deallocation. The inode will be
1560 * deallocated by the next read/write node to attempt an allocation
1561 * in the same resource group
1563 * We have to (at the moment) hold the inodes main lock to cover
1564 * the gap between unlocking the shared lock on the iopen lock and
1565 * taking the exclusive lock. I'd rather do a shared -> exclusive
1566 * conversion on the iopen lock, but we can change that later. This
1567 * is safe, just less efficient.
1570 static void gfs2_evict_inode(struct inode *inode)
1572 struct super_block *sb = inode->i_sb;
1573 struct gfs2_sbd *sdp = sb->s_fs_info;
1574 struct gfs2_inode *ip = GFS2_I(inode);
1575 struct gfs2_holder gh;
1576 struct address_space *metamapping;
1579 if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) {
1584 if (inode->i_nlink || sb_rdonly(sb))
1587 if (test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) {
1588 BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl));
1589 gfs2_holder_mark_uninitialized(&gh);
1593 /* Deletes should never happen under memory pressure anymore. */
1594 if (WARN_ON_ONCE(current->flags & PF_MEMALLOC))
1597 /* Must not read inode block until block type has been verified */
1598 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh);
1599 if (unlikely(error)) {
1600 glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
1601 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1602 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
1606 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
1610 if (test_bit(GIF_INVALID, &ip->i_flags)) {
1611 error = gfs2_inode_refresh(ip);
1617 * The inode may have been recreated in the meantime.
1623 if (gfs2_holder_initialized(&ip->i_iopen_gh) &&
1624 test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
1625 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1626 gfs2_glock_dq_wait(&ip->i_iopen_gh);
1627 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE,
1629 error = gfs2_glock_nq(&ip->i_iopen_gh);
1634 if (S_ISDIR(inode->i_mode) &&
1635 (ip->i_diskflags & GFS2_DIF_EXHASH)) {
1636 error = gfs2_dir_exhash_dealloc(ip);
1642 error = gfs2_ea_dealloc(ip);
1647 if (!gfs2_is_stuffed(ip)) {
1648 error = gfs2_file_dealloc(ip);
1653 /* We're about to clear the bitmap for the dinode, but as soon as we
1654 do, gfs2_create_inode can create another inode at the same block
1655 location and try to set gl_object again. We clear gl_object here so
1656 that subsequent inode creates don't see an old gl_object. */
1657 glock_clear_object(ip->i_gl, ip);
1658 error = gfs2_dinode_dealloc(ip);
1662 gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
1663 GFS2_LFC_EVICT_INODE);
1664 metamapping = gfs2_glock2aspace(ip->i_gl);
1665 if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) {
1666 filemap_fdatawrite(metamapping);
1667 filemap_fdatawait(metamapping);
1669 write_inode_now(inode, 1);
1670 gfs2_ail_flush(ip->i_gl, 0);
1672 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
1675 /* Needs to be done before glock release & also in a transaction */
1676 truncate_inode_pages(&inode->i_data, 0);
1677 truncate_inode_pages(metamapping, 0);
1678 gfs2_trans_end(sdp);
1681 if (gfs2_rs_active(&ip->i_res))
1682 gfs2_rs_deltree(&ip->i_res);
1684 if (gfs2_holder_initialized(&ip->i_iopen_gh)) {
1685 glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
1686 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
1687 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1688 gfs2_glock_dq(&ip->i_iopen_gh);
1690 gfs2_holder_uninit(&ip->i_iopen_gh);
1692 if (gfs2_holder_initialized(&gh)) {
1693 glock_clear_object(ip->i_gl, ip);
1694 gfs2_glock_dq_uninit(&gh);
1696 if (error && error != GLR_TRYFAILED && error != -EROFS)
1697 fs_warn(sdp, "gfs2_evict_inode: %d\n", error);
1699 truncate_inode_pages_final(&inode->i_data);
1700 gfs2_rsqa_delete(ip, NULL);
1701 gfs2_ordered_del_inode(ip);
1703 gfs2_dir_hash_inval(ip);
1704 glock_clear_object(ip->i_gl, ip);
1705 wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE);
1706 gfs2_glock_add_to_lru(ip->i_gl);
1707 gfs2_glock_put_eventually(ip->i_gl);
1709 if (gfs2_holder_initialized(&ip->i_iopen_gh)) {
1710 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1712 glock_clear_object(gl, ip);
1713 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1714 gfs2_glock_hold(gl);
1715 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
1716 gfs2_glock_put_eventually(gl);
1720 static struct inode *gfs2_alloc_inode(struct super_block *sb)
1722 struct gfs2_inode *ip;
1724 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL);
1729 memset(&ip->i_res, 0, sizeof(ip->i_res));
1730 RB_CLEAR_NODE(&ip->i_res.rs_node);
1732 return &ip->i_inode;
1735 static void gfs2_free_inode(struct inode *inode)
1737 kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode));
1740 const struct super_operations gfs2_super_ops = {
1741 .alloc_inode = gfs2_alloc_inode,
1742 .free_inode = gfs2_free_inode,
1743 .write_inode = gfs2_write_inode,
1744 .dirty_inode = gfs2_dirty_inode,
1745 .evict_inode = gfs2_evict_inode,
1746 .put_super = gfs2_put_super,
1747 .sync_fs = gfs2_sync_fs,
1748 .freeze_super = gfs2_freeze,
1749 .thaw_super = gfs2_unfreeze,
1750 .statfs = gfs2_statfs,
1751 .remount_fs = gfs2_remount_fs,
1752 .drop_inode = gfs2_drop_inode,
1753 .show_options = gfs2_show_options,