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>
49 SHOULD_NOT_DELETE_DINODE,
50 SHOULD_DEFER_EVICTION,
54 * gfs2_jindex_free - Clear all the journal index information
55 * @sdp: The GFS2 superblock
59 void gfs2_jindex_free(struct gfs2_sbd *sdp)
61 struct list_head list;
62 struct gfs2_jdesc *jd;
64 spin_lock(&sdp->sd_jindex_spin);
65 list_add(&list, &sdp->sd_jindex_list);
66 list_del_init(&sdp->sd_jindex_list);
68 spin_unlock(&sdp->sd_jindex_spin);
71 while (!list_empty(&list)) {
72 jd = list_first_entry(&list, struct gfs2_jdesc, jd_list);
73 gfs2_free_journal_extents(jd);
74 list_del(&jd->jd_list);
81 static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid)
83 struct gfs2_jdesc *jd;
85 list_for_each_entry(jd, head, jd_list) {
86 if (jd->jd_jid == jid)
92 struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid)
94 struct gfs2_jdesc *jd;
96 spin_lock(&sdp->sd_jindex_spin);
97 jd = jdesc_find_i(&sdp->sd_jindex_list, jid);
98 spin_unlock(&sdp->sd_jindex_spin);
103 int gfs2_jdesc_check(struct gfs2_jdesc *jd)
105 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
106 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
107 u64 size = i_size_read(jd->jd_inode);
109 if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, BIT(30)))
112 jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift;
114 if (gfs2_write_alloc_required(ip, 0, size)) {
115 gfs2_consist_inode(ip);
123 * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one
124 * @sdp: the filesystem
129 int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
131 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
132 struct gfs2_glock *j_gl = ip->i_gl;
133 struct gfs2_log_header_host head;
136 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
137 if (gfs2_withdrawn(sdp))
140 error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
146 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
151 /* Initialize some head of the log stuff */
152 sdp->sd_log_sequence = head.lh_sequence + 1;
153 gfs2_log_pointers_init(sdp, head.lh_blkno);
155 error = gfs2_quota_init(sdp);
156 if (!error && gfs2_withdrawn(sdp))
159 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
163 void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
165 const struct gfs2_statfs_change *str = buf;
167 sc->sc_total = be64_to_cpu(str->sc_total);
168 sc->sc_free = be64_to_cpu(str->sc_free);
169 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes);
172 void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
174 struct gfs2_statfs_change *str = buf;
176 str->sc_total = cpu_to_be64(sc->sc_total);
177 str->sc_free = cpu_to_be64(sc->sc_free);
178 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes);
181 int gfs2_statfs_init(struct gfs2_sbd *sdp)
183 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
184 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
185 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
186 struct buffer_head *m_bh;
187 struct gfs2_holder gh;
190 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
195 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
199 if (sdp->sd_args.ar_spectator) {
200 spin_lock(&sdp->sd_statfs_spin);
201 gfs2_statfs_change_in(m_sc, m_bh->b_data +
202 sizeof(struct gfs2_dinode));
203 spin_unlock(&sdp->sd_statfs_spin);
205 spin_lock(&sdp->sd_statfs_spin);
206 gfs2_statfs_change_in(m_sc, m_bh->b_data +
207 sizeof(struct gfs2_dinode));
208 gfs2_statfs_change_in(l_sc, sdp->sd_sc_bh->b_data +
209 sizeof(struct gfs2_dinode));
210 spin_unlock(&sdp->sd_statfs_spin);
216 gfs2_glock_dq_uninit(&gh);
220 void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
223 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
224 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
225 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
229 gfs2_trans_add_meta(l_ip->i_gl, sdp->sd_sc_bh);
231 spin_lock(&sdp->sd_statfs_spin);
232 l_sc->sc_total += total;
233 l_sc->sc_free += free;
234 l_sc->sc_dinodes += dinodes;
235 gfs2_statfs_change_out(l_sc, sdp->sd_sc_bh->b_data +
236 sizeof(struct gfs2_dinode));
237 if (sdp->sd_args.ar_statfs_percent) {
238 x = 100 * l_sc->sc_free;
239 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
240 if (x >= y || x <= -y)
243 spin_unlock(&sdp->sd_statfs_spin);
246 gfs2_wake_up_statfs(sdp);
249 void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh)
251 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
252 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
253 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
254 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
256 gfs2_trans_add_meta(l_ip->i_gl, sdp->sd_sc_bh);
257 gfs2_trans_add_meta(m_ip->i_gl, m_bh);
259 spin_lock(&sdp->sd_statfs_spin);
260 m_sc->sc_total += l_sc->sc_total;
261 m_sc->sc_free += l_sc->sc_free;
262 m_sc->sc_dinodes += l_sc->sc_dinodes;
263 memset(l_sc, 0, sizeof(struct gfs2_statfs_change));
264 memset(sdp->sd_sc_bh->b_data + sizeof(struct gfs2_dinode),
265 0, sizeof(struct gfs2_statfs_change));
266 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
267 spin_unlock(&sdp->sd_statfs_spin);
270 int gfs2_statfs_sync(struct super_block *sb, int type)
272 struct gfs2_sbd *sdp = sb->s_fs_info;
273 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
274 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
275 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
276 struct gfs2_holder gh;
277 struct buffer_head *m_bh;
280 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
285 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
289 spin_lock(&sdp->sd_statfs_spin);
290 gfs2_statfs_change_in(m_sc, m_bh->b_data +
291 sizeof(struct gfs2_dinode));
292 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) {
293 spin_unlock(&sdp->sd_statfs_spin);
296 spin_unlock(&sdp->sd_statfs_spin);
298 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
302 update_statfs(sdp, m_bh);
303 sdp->sd_statfs_force_sync = 0;
310 gfs2_glock_dq_uninit(&gh);
316 struct list_head list;
317 struct gfs2_holder gh;
321 * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all
323 * @sdp: the file system
328 static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp)
330 struct gfs2_inode *ip;
331 struct gfs2_jdesc *jd;
334 struct gfs2_log_header_host lh;
338 * Grab all the journal glocks in SH mode. We are *probably* doing
339 * that to prevent recovery.
342 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
343 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL);
348 ip = GFS2_I(jd->jd_inode);
349 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh);
354 list_add(&lfcc->list, &list);
357 gfs2_freeze_unlock(&sdp->sd_freeze_gh);
359 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE,
360 LM_FLAG_NOEXP | GL_NOPID,
365 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
366 error = gfs2_jdesc_check(jd);
369 error = gfs2_find_jhead(jd, &lh, false);
372 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
379 goto out; /* success */
381 gfs2_freeze_unlock(&sdp->sd_freeze_gh);
384 error2 = gfs2_freeze_lock_shared(sdp);
385 gfs2_assert_withdraw(sdp, !error2);
388 while (!list_empty(&list)) {
389 lfcc = list_first_entry(&list, struct lfcc, list);
390 list_del(&lfcc->list);
391 gfs2_glock_dq_uninit(&lfcc->gh);
397 void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
399 const struct inode *inode = &ip->i_inode;
400 struct gfs2_dinode *str = buf;
402 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
403 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
404 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
405 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
406 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
407 str->di_mode = cpu_to_be32(inode->i_mode);
408 str->di_uid = cpu_to_be32(i_uid_read(inode));
409 str->di_gid = cpu_to_be32(i_gid_read(inode));
410 str->di_nlink = cpu_to_be32(inode->i_nlink);
411 str->di_size = cpu_to_be64(i_size_read(inode));
412 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(inode));
413 str->di_atime = cpu_to_be64(inode->i_atime.tv_sec);
414 str->di_mtime = cpu_to_be64(inode->i_mtime.tv_sec);
415 str->di_ctime = cpu_to_be64(inode->i_ctime.tv_sec);
417 str->di_goal_meta = cpu_to_be64(ip->i_goal);
418 str->di_goal_data = cpu_to_be64(ip->i_goal);
419 str->di_generation = cpu_to_be64(ip->i_generation);
421 str->di_flags = cpu_to_be32(ip->i_diskflags);
422 str->di_height = cpu_to_be16(ip->i_height);
423 str->di_payload_format = cpu_to_be32(S_ISDIR(inode->i_mode) &&
424 !(ip->i_diskflags & GFS2_DIF_EXHASH) ?
426 str->di_depth = cpu_to_be16(ip->i_depth);
427 str->di_entries = cpu_to_be32(ip->i_entries);
429 str->di_eattr = cpu_to_be64(ip->i_eattr);
430 str->di_atime_nsec = cpu_to_be32(inode->i_atime.tv_nsec);
431 str->di_mtime_nsec = cpu_to_be32(inode->i_mtime.tv_nsec);
432 str->di_ctime_nsec = cpu_to_be32(inode->i_ctime.tv_nsec);
436 * gfs2_write_inode - Make sure the inode is stable on the disk
438 * @wbc: The writeback control structure
443 static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
445 struct gfs2_inode *ip = GFS2_I(inode);
446 struct gfs2_sbd *sdp = GFS2_SB(inode);
447 struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
448 struct backing_dev_info *bdi = inode_to_bdi(metamapping->host);
450 bool flush_all = (wbc->sync_mode == WB_SYNC_ALL || gfs2_is_jdata(ip));
453 gfs2_log_flush(GFS2_SB(inode), ip->i_gl,
454 GFS2_LOG_HEAD_FLUSH_NORMAL |
455 GFS2_LFC_WRITE_INODE);
456 if (bdi->wb.dirty_exceeded)
457 gfs2_ail1_flush(sdp, wbc);
459 filemap_fdatawrite(metamapping);
461 ret = filemap_fdatawait(metamapping);
463 mark_inode_dirty_sync(inode);
465 spin_lock(&inode->i_lock);
466 if (!(inode->i_flags & I_DIRTY))
467 gfs2_ordered_del_inode(ip);
468 spin_unlock(&inode->i_lock);
474 * gfs2_dirty_inode - check for atime updates
475 * @inode: The inode in question
476 * @flags: The type of dirty
478 * Unfortunately it can be called under any combination of inode
479 * glock and freeze glock, so we have to check carefully.
481 * At the moment this deals only with atime - it should be possible
482 * to expand that role in future, once a review of the locking has
486 static void gfs2_dirty_inode(struct inode *inode, int flags)
488 struct gfs2_inode *ip = GFS2_I(inode);
489 struct gfs2_sbd *sdp = GFS2_SB(inode);
490 struct buffer_head *bh;
491 struct gfs2_holder gh;
493 int need_endtrans = 0;
496 if (unlikely(!ip->i_gl)) {
497 /* This can only happen during incomplete inode creation. */
498 BUG_ON(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags));
502 if (unlikely(gfs2_withdrawn(sdp)))
504 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
505 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
507 fs_err(sdp, "dirty_inode: glock %d\n", ret);
508 gfs2_dump_glock(NULL, ip->i_gl, true);
512 } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
515 if (current->journal_info == NULL) {
516 ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
518 fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret);
524 ret = gfs2_meta_inode_buffer(ip, &bh);
526 gfs2_trans_add_meta(ip->i_gl, bh);
527 gfs2_dinode_out(ip, bh->b_data);
535 gfs2_glock_dq_uninit(&gh);
539 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
540 * @sdp: the filesystem
545 void gfs2_make_fs_ro(struct gfs2_sbd *sdp)
547 int log_write_allowed = test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
549 if (!test_bit(SDF_DEACTIVATING, &sdp->sd_flags))
550 gfs2_flush_delete_work(sdp);
552 if (!log_write_allowed && current == sdp->sd_quotad_process)
553 fs_warn(sdp, "The quotad daemon is withdrawing.\n");
554 else if (sdp->sd_quotad_process)
555 kthread_stop(sdp->sd_quotad_process);
556 sdp->sd_quotad_process = NULL;
558 if (!log_write_allowed && current == sdp->sd_logd_process)
559 fs_warn(sdp, "The logd daemon is withdrawing.\n");
560 else if (sdp->sd_logd_process)
561 kthread_stop(sdp->sd_logd_process);
562 sdp->sd_logd_process = NULL;
564 if (log_write_allowed) {
565 gfs2_quota_sync(sdp->sd_vfs, 0);
566 gfs2_statfs_sync(sdp->sd_vfs, 0);
568 /* We do two log flushes here. The first one commits dirty inodes
569 * and rgrps to the journal, but queues up revokes to the ail list.
570 * The second flush writes out and removes the revokes.
572 * The first must be done before the FLUSH_SHUTDOWN code
573 * clears the LIVE flag, otherwise it will not be able to start
574 * a transaction to write its revokes, and the error will cause
575 * a withdraw of the file system. */
576 gfs2_log_flush(sdp, NULL, GFS2_LFC_MAKE_FS_RO);
577 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN |
578 GFS2_LFC_MAKE_FS_RO);
579 wait_event_timeout(sdp->sd_log_waitq,
580 gfs2_log_is_empty(sdp),
582 gfs2_assert_warn(sdp, gfs2_log_is_empty(sdp));
584 wait_event_timeout(sdp->sd_log_waitq,
585 gfs2_log_is_empty(sdp),
588 gfs2_quota_cleanup(sdp);
590 if (!log_write_allowed)
591 sdp->sd_vfs->s_flags |= SB_RDONLY;
595 * gfs2_put_super - Unmount the filesystem
596 * @sb: The VFS superblock
600 static void gfs2_put_super(struct super_block *sb)
602 struct gfs2_sbd *sdp = sb->s_fs_info;
603 struct gfs2_jdesc *jd;
605 /* No more recovery requests */
606 set_bit(SDF_NORECOVERY, &sdp->sd_flags);
609 /* Wait on outstanding recovery */
611 spin_lock(&sdp->sd_jindex_spin);
612 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
613 if (!test_bit(JDF_RECOVERY, &jd->jd_flags))
615 spin_unlock(&sdp->sd_jindex_spin);
616 wait_on_bit(&jd->jd_flags, JDF_RECOVERY,
617 TASK_UNINTERRUPTIBLE);
620 spin_unlock(&sdp->sd_jindex_spin);
622 if (!sb_rdonly(sb)) {
623 gfs2_make_fs_ro(sdp);
625 WARN_ON(gfs2_withdrawing(sdp));
627 /* At this point, we're through modifying the disk */
631 gfs2_freeze_unlock(&sdp->sd_freeze_gh);
633 iput(sdp->sd_jindex);
634 iput(sdp->sd_statfs_inode);
635 iput(sdp->sd_rindex);
636 iput(sdp->sd_quota_inode);
638 gfs2_glock_put(sdp->sd_rename_gl);
639 gfs2_glock_put(sdp->sd_freeze_gl);
641 if (!sdp->sd_args.ar_spectator) {
642 if (gfs2_holder_initialized(&sdp->sd_journal_gh))
643 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
644 if (gfs2_holder_initialized(&sdp->sd_jinode_gh))
645 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
646 brelse(sdp->sd_sc_bh);
647 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
648 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
649 free_local_statfs_inodes(sdp);
650 iput(sdp->sd_qc_inode);
653 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
654 gfs2_clear_rgrpd(sdp);
655 gfs2_jindex_free(sdp);
656 /* Take apart glock structures and buffer lists */
657 gfs2_gl_hash_clear(sdp);
658 truncate_inode_pages_final(&sdp->sd_aspace);
659 gfs2_delete_debugfs_file(sdp);
660 /* Unmount the locking protocol */
661 gfs2_lm_unmount(sdp);
663 /* At this point, we're through participating in the lockspace */
664 gfs2_sys_fs_del(sdp);
669 * gfs2_sync_fs - sync the filesystem
670 * @sb: the superblock
671 * @wait: true to wait for completion
673 * Flushes the log to disk.
676 static int gfs2_sync_fs(struct super_block *sb, int wait)
678 struct gfs2_sbd *sdp = sb->s_fs_info;
680 gfs2_quota_sync(sb, -1);
682 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
684 return sdp->sd_log_error;
687 static int gfs2_freeze_locally(struct gfs2_sbd *sdp)
689 struct super_block *sb = sdp->sd_vfs;
692 error = freeze_super(sb);
696 if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
697 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_FREEZE |
698 GFS2_LFC_FREEZE_GO_SYNC);
699 if (gfs2_withdrawn(sdp)) {
707 static int gfs2_do_thaw(struct gfs2_sbd *sdp)
709 struct super_block *sb = sdp->sd_vfs;
712 error = gfs2_freeze_lock_shared(sdp);
715 error = thaw_super(sb);
720 fs_info(sdp, "GFS2: couldn't thaw filesystem: %d\n", error);
721 gfs2_assert_withdraw(sdp, 0);
725 void gfs2_freeze_func(struct work_struct *work)
727 struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work);
728 struct super_block *sb = sdp->sd_vfs;
731 mutex_lock(&sdp->sd_freeze_mutex);
733 if (test_bit(SDF_FROZEN, &sdp->sd_flags))
736 error = gfs2_freeze_locally(sdp);
740 gfs2_freeze_unlock(&sdp->sd_freeze_gh);
741 set_bit(SDF_FROZEN, &sdp->sd_flags);
743 error = gfs2_do_thaw(sdp);
747 clear_bit(SDF_FROZEN, &sdp->sd_flags);
751 fs_info(sdp, "GFS2: couldn't freeze filesystem: %d\n", error);
754 mutex_unlock(&sdp->sd_freeze_mutex);
755 deactivate_super(sb);
759 * gfs2_freeze_super - prevent further writes to the filesystem
760 * @sb: the VFS structure for the filesystem
764 static int gfs2_freeze_super(struct super_block *sb)
766 struct gfs2_sbd *sdp = sb->s_fs_info;
769 if (!mutex_trylock(&sdp->sd_freeze_mutex))
772 if (test_bit(SDF_FROZEN, &sdp->sd_flags))
776 error = gfs2_freeze_locally(sdp);
778 fs_info(sdp, "GFS2: couldn't freeze filesystem: %d\n",
783 error = gfs2_lock_fs_check_clean(sdp);
787 error = gfs2_do_thaw(sdp);
792 fs_err(sdp, "waiting for recovery before freeze\n");
793 else if (error == -EIO) {
794 fs_err(sdp, "Fatal IO error: cannot freeze gfs2 due "
795 "to recovery error.\n");
798 fs_err(sdp, "error freezing FS: %d\n", error);
800 fs_err(sdp, "retrying...\n");
806 set_bit(SDF_FREEZE_INITIATOR, &sdp->sd_flags);
807 set_bit(SDF_FROZEN, &sdp->sd_flags);
809 mutex_unlock(&sdp->sd_freeze_mutex);
814 * gfs2_thaw_super - reallow writes to the filesystem
815 * @sb: the VFS structure for the filesystem
819 static int gfs2_thaw_super(struct super_block *sb)
821 struct gfs2_sbd *sdp = sb->s_fs_info;
824 if (!mutex_trylock(&sdp->sd_freeze_mutex))
827 if (!test_bit(SDF_FREEZE_INITIATOR, &sdp->sd_flags))
830 gfs2_freeze_unlock(&sdp->sd_freeze_gh);
832 error = gfs2_do_thaw(sdp);
835 clear_bit(SDF_FREEZE_INITIATOR, &sdp->sd_flags);
836 clear_bit(SDF_FROZEN, &sdp->sd_flags);
839 mutex_unlock(&sdp->sd_freeze_mutex);
843 void gfs2_thaw_freeze_initiator(struct super_block *sb)
845 struct gfs2_sbd *sdp = sb->s_fs_info;
847 mutex_lock(&sdp->sd_freeze_mutex);
848 if (!test_bit(SDF_FREEZE_INITIATOR, &sdp->sd_flags))
851 gfs2_freeze_unlock(&sdp->sd_freeze_gh);
854 mutex_unlock(&sdp->sd_freeze_mutex);
858 * statfs_slow_fill - fill in the sg for a given RG
860 * @sc: the sc structure
862 * Returns: 0 on success, -ESTALE if the LVB is invalid
865 static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
866 struct gfs2_statfs_change_host *sc)
868 gfs2_rgrp_verify(rgd);
869 sc->sc_total += rgd->rd_data;
870 sc->sc_free += rgd->rd_free;
871 sc->sc_dinodes += rgd->rd_dinodes;
876 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking
877 * @sdp: the filesystem
878 * @sc: the sc info that will be returned
880 * Any error (other than a signal) will cause this routine to fall back
881 * to the synchronous version.
883 * FIXME: This really shouldn't busy wait like this.
888 static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
890 struct gfs2_rgrpd *rgd_next;
891 struct gfs2_holder *gha, *gh;
892 unsigned int slots = 64;
897 memset(sc, 0, sizeof(struct gfs2_statfs_change_host));
898 gha = kmalloc_array(slots, sizeof(struct gfs2_holder), GFP_KERNEL);
901 for (x = 0; x < slots; x++)
902 gfs2_holder_mark_uninitialized(gha + x);
904 rgd_next = gfs2_rgrpd_get_first(sdp);
909 for (x = 0; x < slots; x++) {
912 if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) {
913 err = gfs2_glock_wait(gh);
915 gfs2_holder_uninit(gh);
919 struct gfs2_rgrpd *rgd =
920 gfs2_glock2rgrp(gh->gh_gl);
922 error = statfs_slow_fill(rgd, sc);
924 gfs2_glock_dq_uninit(gh);
928 if (gfs2_holder_initialized(gh))
930 else if (rgd_next && !error) {
931 error = gfs2_glock_nq_init(rgd_next->rd_gl,
935 rgd_next = gfs2_rgrpd_get_next(rgd_next);
939 if (signal_pending(current))
940 error = -ERESTARTSYS;
954 * gfs2_statfs_i - Do a statfs
955 * @sdp: the filesystem
956 * @sc: the sc structure
961 static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
963 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
964 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
966 spin_lock(&sdp->sd_statfs_spin);
969 sc->sc_total += l_sc->sc_total;
970 sc->sc_free += l_sc->sc_free;
971 sc->sc_dinodes += l_sc->sc_dinodes;
973 spin_unlock(&sdp->sd_statfs_spin);
977 if (sc->sc_free > sc->sc_total)
978 sc->sc_free = sc->sc_total;
979 if (sc->sc_dinodes < 0)
986 * gfs2_statfs - Gather and return stats about the filesystem
987 * @dentry: The name of the link
990 * Returns: 0 on success or error code
993 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
995 struct super_block *sb = dentry->d_sb;
996 struct gfs2_sbd *sdp = sb->s_fs_info;
997 struct gfs2_statfs_change_host sc;
1000 error = gfs2_rindex_update(sdp);
1004 if (gfs2_tune_get(sdp, gt_statfs_slow))
1005 error = gfs2_statfs_slow(sdp, &sc);
1007 error = gfs2_statfs_i(sdp, &sc);
1012 buf->f_type = GFS2_MAGIC;
1013 buf->f_bsize = sdp->sd_sb.sb_bsize;
1014 buf->f_blocks = sc.sc_total;
1015 buf->f_bfree = sc.sc_free;
1016 buf->f_bavail = sc.sc_free;
1017 buf->f_files = sc.sc_dinodes + sc.sc_free;
1018 buf->f_ffree = sc.sc_free;
1019 buf->f_namelen = GFS2_FNAMESIZE;
1025 * gfs2_drop_inode - Drop an inode (test for remote unlink)
1026 * @inode: The inode to drop
1028 * If we've received a callback on an iopen lock then it's because a
1029 * remote node tried to deallocate the inode but failed due to this node
1030 * still having the inode open. Here we mark the link count zero
1031 * since we know that it must have reached zero if the GLF_DEMOTE flag
1032 * is set on the iopen glock. If we didn't do a disk read since the
1033 * remote node removed the final link then we might otherwise miss
1034 * this event. This check ensures that this node will deallocate the
1035 * inode's blocks, or alternatively pass the baton on to another
1036 * node for later deallocation.
1039 static int gfs2_drop_inode(struct inode *inode)
1041 struct gfs2_inode *ip = GFS2_I(inode);
1042 struct gfs2_sbd *sdp = GFS2_SB(inode);
1044 if (inode->i_nlink &&
1045 gfs2_holder_initialized(&ip->i_iopen_gh)) {
1046 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1047 if (test_bit(GLF_DEMOTE, &gl->gl_flags))
1052 * When under memory pressure when an inode's link count has dropped to
1053 * zero, defer deleting the inode to the delete workqueue. This avoids
1054 * calling into DLM under memory pressure, which can deadlock.
1056 if (!inode->i_nlink &&
1057 unlikely(current->flags & PF_MEMALLOC) &&
1058 gfs2_holder_initialized(&ip->i_iopen_gh)) {
1059 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1061 gfs2_glock_hold(gl);
1062 if (!gfs2_queue_try_to_evict(gl))
1063 gfs2_glock_queue_put(gl);
1068 * No longer cache inodes when trying to evict them all.
1070 if (test_bit(SDF_EVICTING, &sdp->sd_flags))
1073 return generic_drop_inode(inode);
1076 static int is_ancestor(const struct dentry *d1, const struct dentry *d2)
1082 } while (!IS_ROOT(d1));
1087 * gfs2_show_options - Show mount options for /proc/mounts
1088 * @s: seq_file structure
1089 * @root: root of this (sub)tree
1091 * Returns: 0 on success or error code
1094 static int gfs2_show_options(struct seq_file *s, struct dentry *root)
1096 struct gfs2_sbd *sdp = root->d_sb->s_fs_info;
1097 struct gfs2_args *args = &sdp->sd_args;
1098 unsigned int logd_secs, statfs_slow, statfs_quantum, quota_quantum;
1100 spin_lock(&sdp->sd_tune.gt_spin);
1101 logd_secs = sdp->sd_tune.gt_logd_secs;
1102 quota_quantum = sdp->sd_tune.gt_quota_quantum;
1103 statfs_quantum = sdp->sd_tune.gt_statfs_quantum;
1104 statfs_slow = sdp->sd_tune.gt_statfs_slow;
1105 spin_unlock(&sdp->sd_tune.gt_spin);
1107 if (is_ancestor(root, sdp->sd_master_dir))
1108 seq_puts(s, ",meta");
1109 if (args->ar_lockproto[0])
1110 seq_show_option(s, "lockproto", args->ar_lockproto);
1111 if (args->ar_locktable[0])
1112 seq_show_option(s, "locktable", args->ar_locktable);
1113 if (args->ar_hostdata[0])
1114 seq_show_option(s, "hostdata", args->ar_hostdata);
1115 if (args->ar_spectator)
1116 seq_puts(s, ",spectator");
1117 if (args->ar_localflocks)
1118 seq_puts(s, ",localflocks");
1120 seq_puts(s, ",debug");
1121 if (args->ar_posix_acl)
1122 seq_puts(s, ",acl");
1123 if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
1125 switch (args->ar_quota) {
1126 case GFS2_QUOTA_OFF:
1129 case GFS2_QUOTA_ACCOUNT:
1139 seq_printf(s, ",quota=%s", state);
1141 if (args->ar_suiddir)
1142 seq_puts(s, ",suiddir");
1143 if (args->ar_data != GFS2_DATA_DEFAULT) {
1145 switch (args->ar_data) {
1146 case GFS2_DATA_WRITEBACK:
1147 state = "writeback";
1149 case GFS2_DATA_ORDERED:
1156 seq_printf(s, ",data=%s", state);
1158 if (args->ar_discard)
1159 seq_puts(s, ",discard");
1160 if (logd_secs != 30)
1161 seq_printf(s, ",commit=%d", logd_secs);
1162 if (statfs_quantum != 30)
1163 seq_printf(s, ",statfs_quantum=%d", statfs_quantum);
1164 else if (statfs_slow)
1165 seq_puts(s, ",statfs_quantum=0");
1166 if (quota_quantum != 60)
1167 seq_printf(s, ",quota_quantum=%d", quota_quantum);
1168 if (args->ar_statfs_percent)
1169 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
1170 if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
1173 switch (args->ar_errors) {
1174 case GFS2_ERRORS_WITHDRAW:
1177 case GFS2_ERRORS_PANIC:
1184 seq_printf(s, ",errors=%s", state);
1186 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
1187 seq_puts(s, ",nobarrier");
1188 if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
1189 seq_puts(s, ",demote_interface_used");
1190 if (args->ar_rgrplvb)
1191 seq_puts(s, ",rgrplvb");
1192 if (args->ar_loccookie)
1193 seq_puts(s, ",loccookie");
1197 static void gfs2_final_release_pages(struct gfs2_inode *ip)
1199 struct inode *inode = &ip->i_inode;
1200 struct gfs2_glock *gl = ip->i_gl;
1202 if (unlikely(!gl)) {
1203 /* This can only happen during incomplete inode creation. */
1204 BUG_ON(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags));
1208 truncate_inode_pages(gfs2_glock2aspace(gl), 0);
1209 truncate_inode_pages(&inode->i_data, 0);
1211 if (atomic_read(&gl->gl_revokes) == 0) {
1212 clear_bit(GLF_LFLUSH, &gl->gl_flags);
1213 clear_bit(GLF_DIRTY, &gl->gl_flags);
1217 static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
1219 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1220 struct gfs2_rgrpd *rgd;
1221 struct gfs2_holder gh;
1224 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
1225 gfs2_consist_inode(ip);
1229 gfs2_rindex_update(sdp);
1231 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
1235 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1237 gfs2_consist_inode(ip);
1242 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
1243 LM_FLAG_NODE_SCOPE, &gh);
1247 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA,
1248 sdp->sd_jdesc->jd_blocks);
1250 goto out_rg_gunlock;
1252 gfs2_free_di(rgd, ip);
1254 gfs2_final_release_pages(ip);
1256 gfs2_trans_end(sdp);
1259 gfs2_glock_dq_uninit(&gh);
1261 gfs2_quota_unhold(ip);
1266 * gfs2_glock_put_eventually
1267 * @gl: The glock to put
1269 * When under memory pressure, trigger a deferred glock put to make sure we
1270 * won't call into DLM and deadlock. Otherwise, put the glock directly.
1273 static void gfs2_glock_put_eventually(struct gfs2_glock *gl)
1275 if (current->flags & PF_MEMALLOC)
1276 gfs2_glock_queue_put(gl);
1281 static bool gfs2_upgrade_iopen_glock(struct inode *inode)
1283 struct gfs2_inode *ip = GFS2_I(inode);
1284 struct gfs2_sbd *sdp = GFS2_SB(inode);
1285 struct gfs2_holder *gh = &ip->i_iopen_gh;
1286 long timeout = 5 * HZ;
1289 gh->gh_flags |= GL_NOCACHE;
1290 gfs2_glock_dq_wait(gh);
1293 * If there are no other lock holders, we will immediately get
1294 * exclusive access to the iopen glock here.
1296 * Otherwise, the other nodes holding the lock will be notified about
1297 * our locking request. If they do not have the inode open, they are
1298 * expected to evict the cached inode and release the lock, allowing us
1301 * Otherwise, if they cannot evict the inode, they are expected to poke
1302 * the inode glock (note: not the iopen glock). We will notice that
1303 * and stop waiting for the iopen glock immediately. The other node(s)
1304 * are then expected to take care of deleting the inode when they no
1307 * As a last resort, if another node keeps holding the iopen glock
1308 * without showing any activity on the inode glock, we will eventually
1309 * time out and fail the iopen glock upgrade.
1311 * Note that we're passing the LM_FLAG_TRY_1CB flag to the first
1312 * locking request as an optimization to notify lock holders as soon as
1313 * possible. Without that flag, they'd be notified implicitly by the
1314 * second locking request.
1317 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, gh);
1318 error = gfs2_glock_nq(gh);
1319 if (error != GLR_TRYFAILED)
1322 gfs2_holder_reinit(LM_ST_EXCLUSIVE, GL_ASYNC | GL_NOCACHE, gh);
1323 error = gfs2_glock_nq(gh);
1327 timeout = wait_event_interruptible_timeout(sdp->sd_async_glock_wait,
1328 !test_bit(HIF_WAIT, &gh->gh_iflags) ||
1329 test_bit(GLF_DEMOTE, &ip->i_gl->gl_flags),
1331 if (!test_bit(HIF_HOLDER, &gh->gh_iflags)) {
1335 return gfs2_glock_holder_ready(gh) == 0;
1339 * evict_should_delete - determine whether the inode is eligible for deletion
1340 * @inode: The inode to evict
1341 * @gh: The glock holder structure
1343 * This function determines whether the evicted inode is eligible to be deleted
1344 * and locks the inode glock.
1346 * Returns: the fate of the dinode
1348 static enum dinode_demise evict_should_delete(struct inode *inode,
1349 struct gfs2_holder *gh)
1351 struct gfs2_inode *ip = GFS2_I(inode);
1352 struct super_block *sb = inode->i_sb;
1353 struct gfs2_sbd *sdp = sb->s_fs_info;
1356 if (unlikely(test_bit(GIF_ALLOC_FAILED, &ip->i_flags)))
1359 if (test_bit(GIF_DEFERRED_DELETE, &ip->i_flags))
1360 return SHOULD_DEFER_EVICTION;
1362 /* Deletes should never happen under memory pressure anymore. */
1363 if (WARN_ON_ONCE(current->flags & PF_MEMALLOC))
1364 return SHOULD_DEFER_EVICTION;
1366 /* Must not read inode block until block type has been verified */
1367 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, gh);
1368 if (unlikely(ret)) {
1369 glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
1370 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1371 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
1372 return SHOULD_DEFER_EVICTION;
1375 if (gfs2_inode_already_deleted(ip->i_gl, ip->i_no_formal_ino))
1376 return SHOULD_NOT_DELETE_DINODE;
1377 ret = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
1379 return SHOULD_NOT_DELETE_DINODE;
1381 ret = gfs2_instantiate(gh);
1383 return SHOULD_NOT_DELETE_DINODE;
1386 * The inode may have been recreated in the meantime.
1389 return SHOULD_NOT_DELETE_DINODE;
1392 if (gfs2_holder_initialized(&ip->i_iopen_gh) &&
1393 test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
1394 if (!gfs2_upgrade_iopen_glock(inode)) {
1395 gfs2_holder_uninit(&ip->i_iopen_gh);
1396 return SHOULD_NOT_DELETE_DINODE;
1399 return SHOULD_DELETE_DINODE;
1403 * evict_unlinked_inode - delete the pieces of an unlinked evicted inode
1404 * @inode: The inode to evict
1406 static int evict_unlinked_inode(struct inode *inode)
1408 struct gfs2_inode *ip = GFS2_I(inode);
1411 if (S_ISDIR(inode->i_mode) &&
1412 (ip->i_diskflags & GFS2_DIF_EXHASH)) {
1413 ret = gfs2_dir_exhash_dealloc(ip);
1419 ret = gfs2_ea_dealloc(ip);
1424 if (!gfs2_is_stuffed(ip)) {
1425 ret = gfs2_file_dealloc(ip);
1431 * As soon as we clear the bitmap for the dinode, gfs2_create_inode()
1432 * can get called to recreate it, or even gfs2_inode_lookup() if the
1433 * inode was recreated on another node in the meantime.
1435 * However, inserting the new inode into the inode hash table will not
1436 * succeed until the old inode is removed, and that only happens after
1437 * ->evict_inode() returns. The new inode is attached to its inode and
1438 * iopen glocks after inserting it into the inode hash table, so at
1439 * that point we can be sure that both glocks are unused.
1442 ret = gfs2_dinode_dealloc(ip);
1443 if (!ret && ip->i_gl)
1444 gfs2_inode_remember_delete(ip->i_gl, ip->i_no_formal_ino);
1451 * evict_linked_inode - evict an inode whose dinode has not been unlinked
1452 * @inode: The inode to evict
1454 static int evict_linked_inode(struct inode *inode)
1456 struct super_block *sb = inode->i_sb;
1457 struct gfs2_sbd *sdp = sb->s_fs_info;
1458 struct gfs2_inode *ip = GFS2_I(inode);
1459 struct address_space *metamapping;
1462 gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
1463 GFS2_LFC_EVICT_INODE);
1464 metamapping = gfs2_glock2aspace(ip->i_gl);
1465 if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) {
1466 filemap_fdatawrite(metamapping);
1467 filemap_fdatawait(metamapping);
1469 write_inode_now(inode, 1);
1470 gfs2_ail_flush(ip->i_gl, 0);
1472 ret = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
1476 /* Needs to be done before glock release & also in a transaction */
1477 truncate_inode_pages(&inode->i_data, 0);
1478 truncate_inode_pages(metamapping, 0);
1479 gfs2_trans_end(sdp);
1484 * gfs2_evict_inode - Remove an inode from cache
1485 * @inode: The inode to evict
1487 * There are three cases to consider:
1488 * 1. i_nlink == 0, we are final opener (and must deallocate)
1489 * 2. i_nlink == 0, we are not the final opener (and cannot deallocate)
1492 * If the fs is read only, then we have to treat all cases as per #3
1493 * since we are unable to do any deallocation. The inode will be
1494 * deallocated by the next read/write node to attempt an allocation
1495 * in the same resource group
1497 * We have to (at the moment) hold the inodes main lock to cover
1498 * the gap between unlocking the shared lock on the iopen lock and
1499 * taking the exclusive lock. I'd rather do a shared -> exclusive
1500 * conversion on the iopen lock, but we can change that later. This
1501 * is safe, just less efficient.
1504 static void gfs2_evict_inode(struct inode *inode)
1506 struct super_block *sb = inode->i_sb;
1507 struct gfs2_sbd *sdp = sb->s_fs_info;
1508 struct gfs2_inode *ip = GFS2_I(inode);
1509 struct gfs2_holder gh;
1512 if (inode->i_nlink || sb_rdonly(sb) || !ip->i_no_addr)
1516 * In case of an incomplete mount, gfs2_evict_inode() may be called for
1517 * system files without having an active journal to write to. In that
1518 * case, skip the filesystem evict.
1523 gfs2_holder_mark_uninitialized(&gh);
1524 ret = evict_should_delete(inode, &gh);
1525 if (ret == SHOULD_DEFER_EVICTION)
1527 if (ret == SHOULD_DELETE_DINODE)
1528 ret = evict_unlinked_inode(inode);
1530 ret = evict_linked_inode(inode);
1532 if (gfs2_rs_active(&ip->i_res))
1533 gfs2_rs_deltree(&ip->i_res);
1535 if (gfs2_holder_initialized(&gh))
1536 gfs2_glock_dq_uninit(&gh);
1537 if (ret && ret != GLR_TRYFAILED && ret != -EROFS)
1538 fs_warn(sdp, "gfs2_evict_inode: %d\n", ret);
1540 truncate_inode_pages_final(&inode->i_data);
1542 gfs2_assert_warn(sdp, ip->i_qadata->qa_ref == 0);
1543 gfs2_rs_deltree(&ip->i_res);
1544 gfs2_ordered_del_inode(ip);
1546 gfs2_dir_hash_inval(ip);
1547 if (gfs2_holder_initialized(&ip->i_iopen_gh)) {
1548 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1550 glock_clear_object(gl, ip);
1551 gfs2_glock_hold(gl);
1552 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1553 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
1554 gfs2_glock_put_eventually(gl);
1557 glock_clear_object(ip->i_gl, ip);
1558 wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE);
1559 gfs2_glock_add_to_lru(ip->i_gl);
1560 gfs2_glock_put_eventually(ip->i_gl);
1565 static struct inode *gfs2_alloc_inode(struct super_block *sb)
1567 struct gfs2_inode *ip;
1569 ip = alloc_inode_sb(sb, gfs2_inode_cachep, GFP_KERNEL);
1575 gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
1576 memset(&ip->i_res, 0, sizeof(ip->i_res));
1577 RB_CLEAR_NODE(&ip->i_res.rs_node);
1579 return &ip->i_inode;
1582 static void gfs2_free_inode(struct inode *inode)
1584 kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode));
1587 extern void free_local_statfs_inodes(struct gfs2_sbd *sdp)
1589 struct local_statfs_inode *lsi, *safe;
1591 /* Run through the statfs inodes list to iput and free memory */
1592 list_for_each_entry_safe(lsi, safe, &sdp->sd_sc_inodes_list, si_list) {
1593 if (lsi->si_jid == sdp->sd_jdesc->jd_jid)
1594 sdp->sd_sc_inode = NULL; /* belongs to this node */
1595 if (lsi->si_sc_inode)
1596 iput(lsi->si_sc_inode);
1597 list_del(&lsi->si_list);
1602 extern struct inode *find_local_statfs_inode(struct gfs2_sbd *sdp,
1605 struct local_statfs_inode *lsi;
1607 /* Return the local (per node) statfs inode in the
1608 * sdp->sd_sc_inodes_list corresponding to the 'index'. */
1609 list_for_each_entry(lsi, &sdp->sd_sc_inodes_list, si_list) {
1610 if (lsi->si_jid == index)
1611 return lsi->si_sc_inode;
1616 const struct super_operations gfs2_super_ops = {
1617 .alloc_inode = gfs2_alloc_inode,
1618 .free_inode = gfs2_free_inode,
1619 .write_inode = gfs2_write_inode,
1620 .dirty_inode = gfs2_dirty_inode,
1621 .evict_inode = gfs2_evict_inode,
1622 .put_super = gfs2_put_super,
1623 .sync_fs = gfs2_sync_fs,
1624 .freeze_super = gfs2_freeze_super,
1625 .thaw_super = gfs2_thaw_super,
1626 .statfs = gfs2_statfs,
1627 .drop_inode = gfs2_drop_inode,
1628 .show_options = gfs2_show_options,