blob: 9f4d9e7be83971618a3275e933e85d5ae9a82af3 [file] [log] [blame]
Thomas Gleixner7336d0e2019-05-31 01:09:56 -07001// SPDX-License-Identifier: GPL-2.0-only
David Teiglandb3b94fa2006-01-16 16:50:04 +00002/*
3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Bob Petersonda6dd402007-12-11 18:49:21 -06004 * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00005 */
6
Joe Perchesd77d1b52014-03-06 12:10:45 -08007#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01009#include <linux/bio.h>
Ingo Molnar174cd4b2017-02-02 19:15:33 +010010#include <linux/sched/signal.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000011#include <linux/slab.h>
12#include <linux/spinlock.h>
13#include <linux/completion.h>
14#include <linux/buffer_head.h>
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +010015#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>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050020#include <linux/gfs2_ondisk.h>
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +010021#include <linux/crc32.h>
22#include <linux/time.h>
Steven Whitehousee4027462010-01-25 11:20:19 +000023#include <linux/wait.h>
Christoph Hellwiga9185b42010-03-05 09:21:37 +010024#include <linux/writeback.h>
Steven Whitehouse4667a0e2011-04-18 14:18:09 +010025#include <linux/backing-dev.h>
Benjamin Marzinski2e60d762014-11-13 20:42:04 -060026#include <linux/kernel.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000027
28#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050029#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000030#include "bmap.h"
31#include "dir.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000032#include "glock.h"
33#include "glops.h"
34#include "inode.h"
35#include "log.h"
36#include "meta_io.h"
37#include "quota.h"
38#include "recovery.h"
39#include "rgrp.h"
40#include "super.h"
41#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050042#include "util.h"
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +010043#include "sys.h"
Steven Whitehouse307cf6e2009-08-26 18:51:04 +010044#include "xattr.h"
Abhi Dasf4686c22019-05-02 14:17:40 -050045#include "lops.h"
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +010046
Steven Whitehousefefc03b2008-12-19 15:32:06 +000047/**
48 * gfs2_jindex_free - Clear all the journal index information
49 * @sdp: The GFS2 superblock
50 *
51 */
52
53void gfs2_jindex_free(struct gfs2_sbd *sdp)
54{
Steven Whitehouseb50f2272014-03-03 13:35:57 +000055 struct list_head list;
Steven Whitehousefefc03b2008-12-19 15:32:06 +000056 struct gfs2_jdesc *jd;
Steven Whitehousefefc03b2008-12-19 15:32:06 +000057
58 spin_lock(&sdp->sd_jindex_spin);
59 list_add(&list, &sdp->sd_jindex_list);
60 list_del_init(&sdp->sd_jindex_list);
61 sdp->sd_journals = 0;
62 spin_unlock(&sdp->sd_jindex_spin);
63
Bob Peterson601ef0d2020-01-28 20:23:45 +010064 sdp->sd_jdesc = NULL;
Steven Whitehousefefc03b2008-12-19 15:32:06 +000065 while (!list_empty(&list)) {
Andreas Gruenbacher969183b2020-02-03 19:22:45 +010066 jd = list_first_entry(&list, struct gfs2_jdesc, jd_list);
Steven Whitehouseb50f2272014-03-03 13:35:57 +000067 gfs2_free_journal_extents(jd);
Steven Whitehousefefc03b2008-12-19 15:32:06 +000068 list_del(&jd->jd_list);
69 iput(jd->jd_inode);
Bob Peterson601ef0d2020-01-28 20:23:45 +010070 jd->jd_inode = NULL;
Steven Whitehousefefc03b2008-12-19 15:32:06 +000071 kfree(jd);
72 }
73}
74
David Teiglandb3b94fa2006-01-16 16:50:04 +000075static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid)
76{
77 struct gfs2_jdesc *jd;
78 int found = 0;
79
80 list_for_each_entry(jd, head, jd_list) {
81 if (jd->jd_jid == jid) {
82 found = 1;
83 break;
84 }
85 }
86
87 if (!found)
88 jd = NULL;
89
90 return jd;
91}
92
93struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid)
94{
95 struct gfs2_jdesc *jd;
96
97 spin_lock(&sdp->sd_jindex_spin);
98 jd = jdesc_find_i(&sdp->sd_jindex_list, jid);
99 spin_unlock(&sdp->sd_jindex_spin);
100
101 return jd;
102}
103
David Teiglandb3b94fa2006-01-16 16:50:04 +0000104int gfs2_jdesc_check(struct gfs2_jdesc *jd)
105{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400106 struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
107 struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
Steven Whitehousea2e0f792010-08-11 09:53:11 +0100108 u64 size = i_size_read(jd->jd_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000109
Fabian Frederick47a9a522016-08-02 12:05:27 -0500110 if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, BIT(30)))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000111 return -EIO;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000112
Steven Whitehousea2e0f792010-08-11 09:53:11 +0100113 jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift;
114
115 if (gfs2_write_alloc_required(ip, 0, size)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000116 gfs2_consist_inode(ip);
Bob Peterson461cb412010-06-24 19:21:20 -0400117 return -EIO;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000118 }
119
Bob Peterson461cb412010-06-24 19:21:20 -0400120 return 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000121}
122
Steven Whitehouse8ad151c2013-12-12 11:34:09 +0000123static int init_threads(struct gfs2_sbd *sdp)
124{
125 struct task_struct *p;
126 int error = 0;
127
128 p = kthread_run(gfs2_logd, sdp, "gfs2_logd");
129 if (IS_ERR(p)) {
130 error = PTR_ERR(p);
131 fs_err(sdp, "can't start logd thread: %d\n", error);
132 return error;
133 }
134 sdp->sd_logd_process = p;
135
136 p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad");
137 if (IS_ERR(p)) {
138 error = PTR_ERR(p);
139 fs_err(sdp, "can't start quotad thread: %d\n", error);
140 goto fail;
141 }
142 sdp->sd_quotad_process = p;
143 return 0;
144
145fail:
146 kthread_stop(sdp->sd_logd_process);
Bob Peterson5b3a9f32019-04-26 08:11:27 -0600147 sdp->sd_logd_process = NULL;
Steven Whitehouse8ad151c2013-12-12 11:34:09 +0000148 return error;
149}
150
David Teiglandb3b94fa2006-01-16 16:50:04 +0000151/**
152 * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one
153 * @sdp: the filesystem
154 *
155 * Returns: errno
156 */
157
158int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
159{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400160 struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500161 struct gfs2_glock *j_gl = ip->i_gl;
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600162 struct gfs2_holder freeze_gh;
Al Viro55167622006-10-13 21:47:13 -0400163 struct gfs2_log_header_host head;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000164 int error;
165
Steven Whitehouse8ad151c2013-12-12 11:34:09 +0000166 error = init_threads(sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000167 if (error)
168 return error;
169
Bob Petersonc860f8f2020-06-25 14:42:17 -0500170 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED,
171 LM_FLAG_NOEXP | GL_EXACT,
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600172 &freeze_gh);
Steven Whitehouse8ad151c2013-12-12 11:34:09 +0000173 if (error)
174 goto fail_threads;
175
Steven Whitehouse1a14d3a2006-11-20 10:37:45 -0500176 j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
Bob Peterson601ef0d2020-01-28 20:23:45 +0100177 if (gfs2_withdrawn(sdp)) {
178 error = -EIO;
179 goto fail;
180 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000181
Abhi Dasf4686c22019-05-02 14:17:40 -0500182 error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
Bob Peterson601ef0d2020-01-28 20:23:45 +0100183 if (error || gfs2_withdrawn(sdp))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000184 goto fail;
185
186 if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
187 gfs2_consist(sdp);
188 error = -EIO;
189 goto fail;
190 }
191
192 /* Initialize some head of the log stuff */
193 sdp->sd_log_sequence = head.lh_sequence + 1;
194 gfs2_log_pointers_init(sdp, head.lh_blkno);
195
David Teiglandb3b94fa2006-01-16 16:50:04 +0000196 error = gfs2_quota_init(sdp);
Bob Peterson601ef0d2020-01-28 20:23:45 +0100197 if (error || gfs2_withdrawn(sdp))
Steven Whitehousea91ea692006-09-04 12:04:26 -0400198 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000199
200 set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
201
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600202 gfs2_glock_dq_uninit(&freeze_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000203
204 return 0;
205
Steven Whitehousea91ea692006-09-04 12:04:26 -0400206fail:
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600207 gfs2_glock_dq_uninit(&freeze_gh);
Steven Whitehouse8ad151c2013-12-12 11:34:09 +0000208fail_threads:
Bob Peterson5b3a9f32019-04-26 08:11:27 -0600209 if (sdp->sd_quotad_process)
210 kthread_stop(sdp->sd_quotad_process);
211 sdp->sd_quotad_process = NULL;
212 if (sdp->sd_logd_process)
213 kthread_stop(sdp->sd_logd_process);
214 sdp->sd_logd_process = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000215 return error;
216}
217
Benjamin Marzinski1946f702009-06-25 15:09:51 -0500218void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100219{
220 const struct gfs2_statfs_change *str = buf;
221
222 sc->sc_total = be64_to_cpu(str->sc_total);
223 sc->sc_free = be64_to_cpu(str->sc_free);
224 sc->sc_dinodes = be64_to_cpu(str->sc_dinodes);
225}
226
227static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
228{
229 struct gfs2_statfs_change *str = buf;
230
231 str->sc_total = cpu_to_be64(sc->sc_total);
232 str->sc_free = cpu_to_be64(sc->sc_free);
233 str->sc_dinodes = cpu_to_be64(sc->sc_dinodes);
234}
235
David Teiglandb3b94fa2006-01-16 16:50:04 +0000236int gfs2_statfs_init(struct gfs2_sbd *sdp)
237{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400238 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
Al Virobd209cc2006-10-13 23:43:19 -0400239 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400240 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
Al Virobd209cc2006-10-13 23:43:19 -0400241 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000242 struct buffer_head *m_bh, *l_bh;
243 struct gfs2_holder gh;
244 int error;
245
246 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
247 &gh);
248 if (error)
249 return error;
250
251 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
252 if (error)
253 goto out;
254
255 if (sdp->sd_args.ar_spectator) {
256 spin_lock(&sdp->sd_statfs_spin);
257 gfs2_statfs_change_in(m_sc, m_bh->b_data +
258 sizeof(struct gfs2_dinode));
259 spin_unlock(&sdp->sd_statfs_spin);
260 } else {
261 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
262 if (error)
263 goto out_m_bh;
264
265 spin_lock(&sdp->sd_statfs_spin);
266 gfs2_statfs_change_in(m_sc, m_bh->b_data +
267 sizeof(struct gfs2_dinode));
268 gfs2_statfs_change_in(l_sc, l_bh->b_data +
269 sizeof(struct gfs2_dinode));
270 spin_unlock(&sdp->sd_statfs_spin);
271
272 brelse(l_bh);
273 }
274
Steven Whitehousea91ea692006-09-04 12:04:26 -0400275out_m_bh:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000276 brelse(m_bh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400277out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000278 gfs2_glock_dq_uninit(&gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000279 return 0;
280}
281
Steven Whitehousecd915492006-09-04 12:49:07 -0400282void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
283 s64 dinodes)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000284{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400285 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
Al Virobd209cc2006-10-13 23:43:19 -0400286 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -0500287 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000288 struct buffer_head *l_bh;
Benjamin Marzinskic14f5732009-10-26 13:29:47 -0500289 s64 x, y;
290 int need_sync = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000291 int error;
292
293 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
294 if (error)
295 return;
296
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000297 gfs2_trans_add_meta(l_ip->i_gl, l_bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000298
299 spin_lock(&sdp->sd_statfs_spin);
300 l_sc->sc_total += total;
301 l_sc->sc_free += free;
302 l_sc->sc_dinodes += dinodes;
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400303 gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode));
Benjamin Marzinskic14f5732009-10-26 13:29:47 -0500304 if (sdp->sd_args.ar_statfs_percent) {
305 x = 100 * l_sc->sc_free;
306 y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
307 if (x >= y || x <= -y)
308 need_sync = 1;
309 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000310 spin_unlock(&sdp->sd_statfs_spin);
311
312 brelse(l_bh);
Benjamin Marzinskic14f5732009-10-26 13:29:47 -0500313 if (need_sync)
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -0500314 gfs2_wake_up_statfs(sdp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000315}
316
Benjamin Marzinski1946f702009-06-25 15:09:51 -0500317void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
318 struct buffer_head *l_bh)
319{
320 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
321 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
322 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
323 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
324
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000325 gfs2_trans_add_meta(l_ip->i_gl, l_bh);
Bob Peterson901c6c62015-03-11 09:52:31 -0500326 gfs2_trans_add_meta(m_ip->i_gl, m_bh);
Benjamin Marzinski1946f702009-06-25 15:09:51 -0500327
328 spin_lock(&sdp->sd_statfs_spin);
329 m_sc->sc_total += l_sc->sc_total;
330 m_sc->sc_free += l_sc->sc_free;
331 m_sc->sc_dinodes += l_sc->sc_dinodes;
332 memset(l_sc, 0, sizeof(struct gfs2_statfs_change));
333 memset(l_bh->b_data + sizeof(struct gfs2_dinode),
334 0, sizeof(struct gfs2_statfs_change));
Benjamin Marzinski1946f702009-06-25 15:09:51 -0500335 gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
Bob Peterson901c6c62015-03-11 09:52:31 -0500336 spin_unlock(&sdp->sd_statfs_spin);
Benjamin Marzinski1946f702009-06-25 15:09:51 -0500337}
338
Steven Whitehouse8c42d632009-09-11 14:36:44 +0100339int gfs2_statfs_sync(struct super_block *sb, int type)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000340{
Steven Whitehouse8c42d632009-09-11 14:36:44 +0100341 struct gfs2_sbd *sdp = sb->s_fs_info;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400342 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
343 struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
Al Virobd209cc2006-10-13 23:43:19 -0400344 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
345 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000346 struct gfs2_holder gh;
347 struct buffer_head *m_bh, *l_bh;
348 int error;
349
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600350 sb_start_write(sb);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000351 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
352 &gh);
353 if (error)
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600354 goto out;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000355
356 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
357 if (error)
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600358 goto out_unlock;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000359
360 spin_lock(&sdp->sd_statfs_spin);
361 gfs2_statfs_change_in(m_sc, m_bh->b_data +
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400362 sizeof(struct gfs2_dinode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000363 if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) {
364 spin_unlock(&sdp->sd_statfs_spin);
365 goto out_bh;
366 }
367 spin_unlock(&sdp->sd_statfs_spin);
368
369 error = gfs2_meta_inode_buffer(l_ip, &l_bh);
370 if (error)
371 goto out_bh;
372
373 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
374 if (error)
375 goto out_bh2;
376
Benjamin Marzinski1946f702009-06-25 15:09:51 -0500377 update_statfs(sdp, m_bh, l_bh);
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -0500378 sdp->sd_statfs_force_sync = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000379
380 gfs2_trans_end(sdp);
381
Steven Whitehousea91ea692006-09-04 12:04:26 -0400382out_bh2:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000383 brelse(l_bh);
Steven Whitehousea91ea692006-09-04 12:04:26 -0400384out_bh:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000385 brelse(m_bh);
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600386out_unlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000387 gfs2_glock_dq_uninit(&gh);
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600388out:
389 sb_end_write(sb);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000390 return error;
391}
392
David Teiglandb3b94fa2006-01-16 16:50:04 +0000393struct lfcc {
394 struct list_head list;
395 struct gfs2_holder gh;
396};
397
398/**
399 * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all
400 * journals are clean
401 * @sdp: the file system
402 * @state: the state to put the transaction lock into
403 * @t_gh: the hold on the transaction lock
404 *
405 * Returns: errno
406 */
407
Bob Peterson52b1cdc2019-11-15 09:42:46 -0500408static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000409{
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500410 struct gfs2_inode *ip;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000411 struct gfs2_jdesc *jd;
412 struct lfcc *lfcc;
413 LIST_HEAD(list);
Al Viro55167622006-10-13 21:47:13 -0400414 struct gfs2_log_header_host lh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000415 int error;
416
David Teiglandb3b94fa2006-01-16 16:50:04 +0000417 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
418 lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL);
419 if (!lfcc) {
420 error = -ENOMEM;
421 goto out;
422 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400423 ip = GFS2_I(jd->jd_inode);
424 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000425 if (error) {
426 kfree(lfcc);
427 goto out;
428 }
429 list_add(&lfcc->list, &list);
430 }
431
Benjamin Marzinski24972552014-05-01 22:26:55 -0500432 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE,
Bob Petersonc860f8f2020-06-25 14:42:17 -0500433 LM_FLAG_NOEXP, &sdp->sd_freeze_gh);
Bob Peterson52b1cdc2019-11-15 09:42:46 -0500434 if (error)
435 goto out;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000436
437 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
438 error = gfs2_jdesc_check(jd);
439 if (error)
440 break;
Abhi Dasf4686c22019-05-02 14:17:40 -0500441 error = gfs2_find_jhead(jd, &lh, false);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000442 if (error)
443 break;
444 if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
445 error = -EBUSY;
446 break;
447 }
448 }
449
450 if (error)
Bob Peterson52b1cdc2019-11-15 09:42:46 -0500451 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000452
Steven Whitehousea91ea692006-09-04 12:04:26 -0400453out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000454 while (!list_empty(&list)) {
Andreas Gruenbacher969183b2020-02-03 19:22:45 +0100455 lfcc = list_first_entry(&list, struct lfcc, list);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000456 list_del(&lfcc->list);
457 gfs2_glock_dq_uninit(&lfcc->gh);
458 kfree(lfcc);
459 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000460 return error;
461}
462
Steven Whitehouse9eed04c2011-05-09 14:11:40 +0100463void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
464{
465 struct gfs2_dinode *str = buf;
466
467 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
468 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
469 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
470 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
471 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
472 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
Eric W. Biedermand0546422013-01-31 22:08:10 -0800473 str->di_uid = cpu_to_be32(i_uid_read(&ip->i_inode));
474 str->di_gid = cpu_to_be32(i_gid_read(&ip->i_inode));
Steven Whitehouse9eed04c2011-05-09 14:11:40 +0100475 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
476 str->di_size = cpu_to_be64(i_size_read(&ip->i_inode));
477 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
478 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
479 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
480 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
481
482 str->di_goal_meta = cpu_to_be64(ip->i_goal);
483 str->di_goal_data = cpu_to_be64(ip->i_goal);
484 str->di_generation = cpu_to_be64(ip->i_generation);
485
486 str->di_flags = cpu_to_be32(ip->i_diskflags);
487 str->di_height = cpu_to_be16(ip->i_height);
488 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
489 !(ip->i_diskflags & GFS2_DIF_EXHASH) ?
490 GFS2_FORMAT_DE : 0);
491 str->di_depth = cpu_to_be16(ip->i_depth);
492 str->di_entries = cpu_to_be32(ip->i_entries);
493
494 str->di_eattr = cpu_to_be64(ip->i_eattr);
495 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
496 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
497 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
498}
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100499
500/**
501 * gfs2_write_inode - Make sure the inode is stable on the disk
502 * @inode: The inode
Steven Whitehouse1027efa2011-03-30 16:13:25 +0100503 * @wbc: The writeback control structure
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100504 *
505 * Returns: errno
506 */
507
Christoph Hellwiga9185b42010-03-05 09:21:37 +0100508static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100509{
510 struct gfs2_inode *ip = GFS2_I(inode);
511 struct gfs2_sbd *sdp = GFS2_SB(inode);
Steven Whitehouse1027efa2011-03-30 16:13:25 +0100512 struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
Christoph Hellwigde1414a2015-01-14 10:42:36 +0100513 struct backing_dev_info *bdi = inode_to_bdi(metamapping->host);
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100514 int ret = 0;
Bob Petersonadbc3dd2017-10-11 16:22:07 +0200515 bool flush_all = (wbc->sync_mode == WB_SYNC_ALL || gfs2_is_jdata(ip));
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100516
Bob Petersonadbc3dd2017-10-11 16:22:07 +0200517 if (flush_all)
Bob Petersonc1696fb2018-01-17 00:01:33 +0100518 gfs2_log_flush(GFS2_SB(inode), ip->i_gl,
Bob Peterson805c09072018-01-08 10:34:17 -0500519 GFS2_LOG_HEAD_FLUSH_NORMAL |
520 GFS2_LFC_WRITE_INODE);
Tejun Heoa88a3412015-05-22 17:13:28 -0400521 if (bdi->wb.dirty_exceeded)
Steven Whitehouse4667a0e2011-04-18 14:18:09 +0100522 gfs2_ail1_flush(sdp, wbc);
Steven Whitehouse1d4ec642011-08-02 13:13:20 +0100523 else
524 filemap_fdatawrite(metamapping);
Bob Petersonadbc3dd2017-10-11 16:22:07 +0200525 if (flush_all)
Steven Whitehouse1027efa2011-03-30 16:13:25 +0100526 ret = filemap_fdatawait(metamapping);
527 if (ret)
528 mark_inode_dirty_sync(inode);
Abhi Das957a7ac2018-01-30 10:00:09 -0700529 else {
530 spin_lock(&inode->i_lock);
531 if (!(inode->i_flags & I_DIRTY))
532 gfs2_ordered_del_inode(ip);
533 spin_unlock(&inode->i_lock);
534 }
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100535 return ret;
536}
537
538/**
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100539 * gfs2_dirty_inode - check for atime updates
540 * @inode: The inode in question
541 * @flags: The type of dirty
542 *
543 * Unfortunately it can be called under any combination of inode
544 * glock and transaction lock, so we have to check carefully.
545 *
546 * At the moment this deals only with atime - it should be possible
547 * to expand that role in future, once a review of the locking has
548 * been carried out.
549 */
550
551static void gfs2_dirty_inode(struct inode *inode, int flags)
552{
553 struct gfs2_inode *ip = GFS2_I(inode);
554 struct gfs2_sbd *sdp = GFS2_SB(inode);
555 struct buffer_head *bh;
556 struct gfs2_holder gh;
557 int need_unlock = 0;
558 int need_endtrans = 0;
559 int ret;
560
Christoph Hellwig0e11f642018-02-21 07:54:49 -0800561 if (!(flags & I_DIRTY_INODE))
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100562 return;
Bob Petersoneb43e6602019-11-14 09:52:15 -0500563 if (unlikely(gfs2_withdrawn(sdp)))
Bob Peterson0d1c7ae2017-03-03 12:37:14 -0500564 return;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100565 if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
566 ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
567 if (ret) {
568 fs_err(sdp, "dirty_inode: glock %d\n", ret);
Bob Petersone28c02b2020-07-30 12:31:38 -0500569 gfs2_dump_glock(NULL, ip->i_gl, true);
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100570 return;
571 }
572 need_unlock = 1;
Benjamin Marzinski3d162682012-11-06 00:49:28 -0600573 } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
574 return;
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100575
576 if (current->journal_info == NULL) {
577 ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
578 if (ret) {
579 fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret);
580 goto out;
581 }
582 need_endtrans = 1;
583 }
584
585 ret = gfs2_meta_inode_buffer(ip, &bh);
586 if (ret == 0) {
Steven Whitehouse350a9b02012-12-14 12:36:02 +0000587 gfs2_trans_add_meta(ip->i_gl, bh);
Steven Whitehouseab9bbda2011-08-15 14:20:36 +0100588 gfs2_dinode_out(ip, bh->b_data);
589 brelse(bh);
590 }
591
592 if (need_endtrans)
593 gfs2_trans_end(sdp);
594out:
595 if (need_unlock)
596 gfs2_glock_dq_uninit(&gh);
597}
598
599/**
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100600 * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
601 * @sdp: the filesystem
602 *
603 * Returns: errno
604 */
605
Andrew Price1f52aa02019-03-27 14:46:00 +0000606int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100607{
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600608 struct gfs2_holder freeze_gh;
Bob Peterson601ef0d2020-01-28 20:23:45 +0100609 int error = 0;
610 int log_write_allowed = test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100611
Bob Peterson601ef0d2020-01-28 20:23:45 +0100612 gfs2_holder_mark_uninitialized(&freeze_gh);
613 if (sdp->sd_freeze_gl &&
614 !gfs2_glock_is_locked_by_me(sdp->sd_freeze_gl)) {
615 if (!log_write_allowed) {
616 error = gfs2_glock_nq_init(sdp->sd_freeze_gl,
Bob Petersonc860f8f2020-06-25 14:42:17 -0500617 LM_ST_SHARED, LM_FLAG_TRY |
618 LM_FLAG_NOEXP | GL_EXACT,
Bob Peterson623ba662020-06-25 13:30:52 -0500619 &freeze_gh);
Bob Peterson601ef0d2020-01-28 20:23:45 +0100620 if (error == GLR_TRYFAILED)
621 error = 0;
622 } else {
623 error = gfs2_glock_nq_init(sdp->sd_freeze_gl,
Bob Petersonc860f8f2020-06-25 14:42:17 -0500624 LM_ST_SHARED,
625 LM_FLAG_NOEXP | GL_EXACT,
Bob Peterson601ef0d2020-01-28 20:23:45 +0100626 &freeze_gh);
627 if (error && !gfs2_withdrawn(sdp))
628 return error;
629 }
630 }
Benjamin Marzinski24972552014-05-01 22:26:55 -0500631
Andreas Gruenbachera0e3cc62020-01-16 20:12:26 +0100632 gfs2_flush_delete_work(sdp);
Bob Peterson601ef0d2020-01-28 20:23:45 +0100633 if (!log_write_allowed && current == sdp->sd_quotad_process)
634 fs_warn(sdp, "The quotad daemon is withdrawing.\n");
635 else if (sdp->sd_quotad_process)
Bob Peterson5b3a9f32019-04-26 08:11:27 -0600636 kthread_stop(sdp->sd_quotad_process);
637 sdp->sd_quotad_process = NULL;
Bob Peterson601ef0d2020-01-28 20:23:45 +0100638
639 if (!log_write_allowed && current == sdp->sd_logd_process)
640 fs_warn(sdp, "The logd daemon is withdrawing.\n");
641 else if (sdp->sd_logd_process)
Bob Peterson5b3a9f32019-04-26 08:11:27 -0600642 kthread_stop(sdp->sd_logd_process);
643 sdp->sd_logd_process = NULL;
Steven Whitehouse8ad151c2013-12-12 11:34:09 +0000644
Bob Peterson601ef0d2020-01-28 20:23:45 +0100645 if (log_write_allowed) {
646 gfs2_quota_sync(sdp->sd_vfs, 0);
647 gfs2_statfs_sync(sdp->sd_vfs, 0);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100648
Bob Peterson601ef0d2020-01-28 20:23:45 +0100649 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN |
650 GFS2_LFC_MAKE_FS_RO);
651 wait_event(sdp->sd_reserving_log_wait,
652 atomic_read(&sdp->sd_reserving_log) == 0);
653 gfs2_assert_warn(sdp, atomic_read(&sdp->sd_log_blks_free) ==
654 sdp->sd_jdesc->jd_blocks);
655 } else {
656 wait_event_timeout(sdp->sd_reserving_log_wait,
657 atomic_read(&sdp->sd_reserving_log) == 0,
658 HZ * 5);
659 }
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -0500660 if (gfs2_holder_initialized(&freeze_gh))
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600661 gfs2_glock_dq_uninit(&freeze_gh);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100662
663 gfs2_quota_cleanup(sdp);
664
Bob Peterson601ef0d2020-01-28 20:23:45 +0100665 if (!log_write_allowed)
666 sdp->sd_vfs->s_flags |= SB_RDONLY;
667
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100668 return error;
669}
670
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100671/**
672 * gfs2_put_super - Unmount the filesystem
673 * @sb: The VFS superblock
674 *
675 */
676
677static void gfs2_put_super(struct super_block *sb)
678{
679 struct gfs2_sbd *sdp = sb->s_fs_info;
680 int error;
681 struct gfs2_jdesc *jd;
682
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100683 /* No more recovery requests */
684 set_bit(SDF_NORECOVERY, &sdp->sd_flags);
685 smp_mb();
686
687 /* Wait on outstanding recovery */
688restart:
689 spin_lock(&sdp->sd_jindex_spin);
690 list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
691 if (!test_bit(JDF_RECOVERY, &jd->jd_flags))
692 continue;
693 spin_unlock(&sdp->sd_jindex_spin);
694 wait_on_bit(&jd->jd_flags, JDF_RECOVERY,
NeilBrown74316202014-07-07 15:16:04 +1000695 TASK_UNINTERRUPTIBLE);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100696 goto restart;
697 }
698 spin_unlock(&sdp->sd_jindex_spin);
699
David Howellsbc98a422017-07-17 08:45:34 +0100700 if (!sb_rdonly(sb)) {
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100701 error = gfs2_make_fs_ro(sdp);
702 if (error)
703 gfs2_io_error(sdp);
704 }
705 /* At this point, we're through modifying the disk */
706
707 /* Release stuff */
708
709 iput(sdp->sd_jindex);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100710 iput(sdp->sd_statfs_inode);
711 iput(sdp->sd_rindex);
712 iput(sdp->sd_quota_inode);
713
714 gfs2_glock_put(sdp->sd_rename_gl);
Benjamin Marzinski24972552014-05-01 22:26:55 -0500715 gfs2_glock_put(sdp->sd_freeze_gl);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100716
717 if (!sdp->sd_args.ar_spectator) {
Bob Peterson601ef0d2020-01-28 20:23:45 +0100718 if (gfs2_holder_initialized(&sdp->sd_journal_gh))
719 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
720 if (gfs2_holder_initialized(&sdp->sd_jinode_gh))
721 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100722 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
723 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100724 iput(sdp->sd_sc_inode);
725 iput(sdp->sd_qc_inode);
726 }
727
728 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
729 gfs2_clear_rgrpd(sdp);
730 gfs2_jindex_free(sdp);
731 /* Take apart glock structures and buffer lists */
732 gfs2_gl_hash_clear(sdp);
Bob Petersonb2fb7da2017-07-28 07:22:55 -0500733 gfs2_delete_debugfs_file(sdp);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100734 /* Unmount the locking protocol */
735 gfs2_lm_unmount(sdp);
736
737 /* At this point, we're through participating in the lockspace */
738 gfs2_sys_fs_del(sdp);
739}
740
741/**
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100742 * gfs2_sync_fs - sync the filesystem
743 * @sb: the superblock
744 *
745 * Flushes the log to disk.
746 */
747
748static int gfs2_sync_fs(struct super_block *sb, int wait)
749{
Steven Whitehouse1027efa2011-03-30 16:13:25 +0100750 struct gfs2_sbd *sdp = sb->s_fs_info;
Jan Karaa1177822012-07-03 16:45:29 +0200751
752 gfs2_quota_sync(sb, -1);
Bob Peterson942b0cd2017-08-16 11:30:06 -0500753 if (wait)
Bob Peterson805c09072018-01-08 10:34:17 -0500754 gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
755 GFS2_LFC_SYNC_FS);
Bob Peterson942b0cd2017-08-16 11:30:06 -0500756 return sdp->sd_log_error;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100757}
758
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600759void gfs2_freeze_func(struct work_struct *work)
760{
761 int error;
762 struct gfs2_holder freeze_gh;
763 struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work);
764 struct super_block *sb = sdp->sd_vfs;
765
766 atomic_inc(&sb->s_active);
Bob Petersonc860f8f2020-06-25 14:42:17 -0500767 error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED,
768 LM_FLAG_NOEXP | GL_EXACT, &freeze_gh);
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600769 if (error) {
Bob Petersonf29e62e2019-05-13 09:42:18 -0500770 fs_info(sdp, "GFS2: couldn't get freeze lock : %d\n", error);
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600771 gfs2_assert_withdraw(sdp, 0);
Abhi Das8f9182192019-04-30 16:53:47 -0500772 } else {
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600773 atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
774 error = thaw_super(sb);
775 if (error) {
Bob Petersonf29e62e2019-05-13 09:42:18 -0500776 fs_info(sdp, "GFS2: couldn't thaw filesystem: %d\n",
777 error);
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600778 gfs2_assert_withdraw(sdp, 0);
779 }
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600780 gfs2_glock_dq_uninit(&freeze_gh);
781 }
782 deactivate_super(sb);
Abhi Das8f9182192019-04-30 16:53:47 -0500783 clear_bit_unlock(SDF_FS_FROZEN, &sdp->sd_flags);
784 wake_up_bit(&sdp->sd_flags, SDF_FS_FROZEN);
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600785 return;
786}
787
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100788/**
789 * gfs2_freeze - prevent further writes to the filesystem
790 * @sb: the VFS structure for the filesystem
791 *
792 */
793
794static int gfs2_freeze(struct super_block *sb)
795{
796 struct gfs2_sbd *sdp = sb->s_fs_info;
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600797 int error = 0;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100798
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600799 mutex_lock(&sdp->sd_freeze_mutex);
800 if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN)
801 goto out;
802
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100803 for (;;) {
Bob Peterson60528af2019-11-14 09:53:36 -0500804 if (gfs2_withdrawn(sdp)) {
805 error = -EINVAL;
806 goto out;
807 }
808
Bob Peterson52b1cdc2019-11-15 09:42:46 -0500809 error = gfs2_lock_fs_check_clean(sdp);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100810 if (!error)
811 break;
812
Bob Peterson55317f52019-04-29 09:36:23 -0600813 if (error == -EBUSY)
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100814 fs_err(sdp, "waiting for recovery before freeze\n");
Bob Peterson52b1cdc2019-11-15 09:42:46 -0500815 else if (error == -EIO) {
816 fs_err(sdp, "Fatal IO error: cannot freeze gfs2 due "
817 "to recovery error.\n");
818 goto out;
819 } else {
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100820 fs_err(sdp, "error freezing FS: %d\n", error);
Bob Peterson52b1cdc2019-11-15 09:42:46 -0500821 }
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100822 fs_err(sdp, "retrying...\n");
823 msleep(1000);
824 }
Abhi Das8f9182192019-04-30 16:53:47 -0500825 set_bit(SDF_FS_FROZEN, &sdp->sd_flags);
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600826out:
827 mutex_unlock(&sdp->sd_freeze_mutex);
828 return error;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100829}
830
831/**
832 * gfs2_unfreeze - reallow writes to the filesystem
833 * @sb: the VFS structure for the filesystem
834 *
835 */
836
837static int gfs2_unfreeze(struct super_block *sb)
838{
Steven Whitehoused564053f2013-01-11 10:49:34 +0000839 struct gfs2_sbd *sdp = sb->s_fs_info;
840
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600841 mutex_lock(&sdp->sd_freeze_mutex);
842 if (atomic_read(&sdp->sd_freeze_state) != SFS_FROZEN ||
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -0500843 !gfs2_holder_initialized(&sdp->sd_freeze_gh)) {
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600844 mutex_unlock(&sdp->sd_freeze_mutex);
845 return 0;
846 }
847
Steven Whitehoused564053f2013-01-11 10:49:34 +0000848 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
Benjamin Marzinski2e60d762014-11-13 20:42:04 -0600849 mutex_unlock(&sdp->sd_freeze_mutex);
Abhi Das8f9182192019-04-30 16:53:47 -0500850 return wait_on_bit(&sdp->sd_flags, SDF_FS_FROZEN, TASK_INTERRUPTIBLE);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100851}
852
853/**
854 * statfs_fill - fill in the sg for a given RG
855 * @rgd: the RG
856 * @sc: the sc structure
857 *
858 * Returns: 0 on success, -ESTALE if the LVB is invalid
859 */
860
861static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
862 struct gfs2_statfs_change_host *sc)
863{
864 gfs2_rgrp_verify(rgd);
865 sc->sc_total += rgd->rd_data;
866 sc->sc_free += rgd->rd_free;
867 sc->sc_dinodes += rgd->rd_dinodes;
868 return 0;
869}
870
871/**
872 * gfs2_statfs_slow - Stat a filesystem using asynchronous locking
873 * @sdp: the filesystem
874 * @sc: the sc info that will be returned
875 *
876 * Any error (other than a signal) will cause this routine to fall back
877 * to the synchronous version.
878 *
879 * FIXME: This really shouldn't busy wait like this.
880 *
881 * Returns: errno
882 */
883
884static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
885{
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100886 struct gfs2_rgrpd *rgd_next;
887 struct gfs2_holder *gha, *gh;
888 unsigned int slots = 64;
889 unsigned int x;
890 int done;
891 int error = 0, err;
892
893 memset(sc, 0, sizeof(struct gfs2_statfs_change_host));
Kees Cook6da2ec52018-06-12 13:55:00 -0700894 gha = kmalloc_array(slots, sizeof(struct gfs2_holder), GFP_KERNEL);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100895 if (!gha)
896 return -ENOMEM;
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -0500897 for (x = 0; x < slots; x++)
898 gfs2_holder_mark_uninitialized(gha + x);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100899
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100900 rgd_next = gfs2_rgrpd_get_first(sdp);
901
902 for (;;) {
903 done = 1;
904
905 for (x = 0; x < slots; x++) {
906 gh = gha + x;
907
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -0500908 if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) {
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100909 err = gfs2_glock_wait(gh);
910 if (err) {
911 gfs2_holder_uninit(gh);
912 error = err;
913 } else {
Andreas Gruenbacher6f6597ba2017-06-30 07:55:08 -0500914 if (!error) {
915 struct gfs2_rgrpd *rgd =
916 gfs2_glock2rgrp(gh->gh_gl);
917
918 error = statfs_slow_fill(rgd, sc);
919 }
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100920 gfs2_glock_dq_uninit(gh);
921 }
922 }
923
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -0500924 if (gfs2_holder_initialized(gh))
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100925 done = 0;
926 else if (rgd_next && !error) {
927 error = gfs2_glock_nq_init(rgd_next->rd_gl,
928 LM_ST_SHARED,
929 GL_ASYNC,
930 gh);
931 rgd_next = gfs2_rgrpd_get_next(rgd_next);
932 done = 0;
933 }
934
935 if (signal_pending(current))
936 error = -ERESTARTSYS;
937 }
938
939 if (done)
940 break;
941
942 yield();
943 }
944
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100945 kfree(gha);
946 return error;
947}
948
949/**
950 * gfs2_statfs_i - Do a statfs
951 * @sdp: the filesystem
952 * @sg: the sg structure
953 *
954 * Returns: errno
955 */
956
957static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
958{
959 struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
960 struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
961
962 spin_lock(&sdp->sd_statfs_spin);
963
964 *sc = *m_sc;
965 sc->sc_total += l_sc->sc_total;
966 sc->sc_free += l_sc->sc_free;
967 sc->sc_dinodes += l_sc->sc_dinodes;
968
969 spin_unlock(&sdp->sd_statfs_spin);
970
971 if (sc->sc_free < 0)
972 sc->sc_free = 0;
973 if (sc->sc_free > sc->sc_total)
974 sc->sc_free = sc->sc_total;
975 if (sc->sc_dinodes < 0)
976 sc->sc_dinodes = 0;
977
978 return 0;
979}
980
981/**
982 * gfs2_statfs - Gather and return stats about the filesystem
983 * @sb: The superblock
984 * @statfsbuf: The buffer
985 *
986 * Returns: 0 on success or error code
987 */
988
989static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
990{
Al Virofc640052016-04-10 01:33:30 -0400991 struct super_block *sb = dentry->d_sb;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +0100992 struct gfs2_sbd *sdp = sb->s_fs_info;
993 struct gfs2_statfs_change_host sc;
994 int error;
995
Steven Whitehouse8339ee52011-08-31 16:38:29 +0100996 error = gfs2_rindex_update(sdp);
997 if (error)
998 return error;
999
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001000 if (gfs2_tune_get(sdp, gt_statfs_slow))
1001 error = gfs2_statfs_slow(sdp, &sc);
1002 else
1003 error = gfs2_statfs_i(sdp, &sc);
1004
1005 if (error)
1006 return error;
1007
1008 buf->f_type = GFS2_MAGIC;
1009 buf->f_bsize = sdp->sd_sb.sb_bsize;
1010 buf->f_blocks = sc.sc_total;
1011 buf->f_bfree = sc.sc_free;
1012 buf->f_bavail = sc.sc_free;
1013 buf->f_files = sc.sc_dinodes + sc.sc_free;
1014 buf->f_ffree = sc.sc_free;
1015 buf->f_namelen = GFS2_FNAMESIZE;
1016
1017 return 0;
1018}
1019
1020/**
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001021 * gfs2_drop_inode - Drop an inode (test for remote unlink)
1022 * @inode: The inode to drop
1023 *
Andreas Gruenbacher61b91cf2017-08-01 09:54:33 -05001024 * If we've received a callback on an iopen lock then it's because a
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001025 * remote node tried to deallocate the inode but failed due to this node
1026 * still having the inode open. Here we mark the link count zero
1027 * since we know that it must have reached zero if the GLF_DEMOTE flag
1028 * is set on the iopen glock. If we didn't do a disk read since the
1029 * remote node removed the final link then we might otherwise miss
1030 * this event. This check ensures that this node will deallocate the
1031 * inode's blocks, or alternatively pass the baton on to another
1032 * node for later deallocation.
1033 */
1034
Al Viro45321ac2010-06-07 13:43:19 -04001035static int gfs2_drop_inode(struct inode *inode)
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001036{
1037 struct gfs2_inode *ip = GFS2_I(inode);
1038
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -05001039 if (!test_bit(GIF_FREE_VFS_INODE, &ip->i_flags) &&
1040 inode->i_nlink &&
1041 gfs2_holder_initialized(&ip->i_iopen_gh)) {
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001042 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -05001043 if (test_bit(GLF_DEMOTE, &gl->gl_flags))
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001044 clear_nlink(inode);
1045 }
Andreas Gruenbacher6a1c8f62017-08-01 11:49:42 -05001046
1047 /*
1048 * When under memory pressure when an inode's link count has dropped to
1049 * zero, defer deleting the inode to the delete workqueue. This avoids
1050 * calling into DLM under memory pressure, which can deadlock.
1051 */
1052 if (!inode->i_nlink &&
1053 unlikely(current->flags & PF_MEMALLOC) &&
1054 gfs2_holder_initialized(&ip->i_iopen_gh)) {
1055 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1056
1057 gfs2_glock_hold(gl);
Andreas Gruenbachera0e3cc62020-01-16 20:12:26 +01001058 if (!gfs2_queue_delete_work(gl, 0))
Andreas Gruenbacher6a1c8f62017-08-01 11:49:42 -05001059 gfs2_glock_queue_put(gl);
1060 return false;
1061 }
1062
Al Viro45321ac2010-06-07 13:43:19 -04001063 return generic_drop_inode(inode);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001064}
1065
1066static int is_ancestor(const struct dentry *d1, const struct dentry *d2)
1067{
1068 do {
1069 if (d1 == d2)
1070 return 1;
1071 d1 = d1->d_parent;
1072 } while (!IS_ROOT(d1));
1073 return 0;
1074}
1075
1076/**
1077 * gfs2_show_options - Show mount options for /proc/mounts
1078 * @s: seq_file structure
Al Viro34c80b12011-12-08 21:32:45 -05001079 * @root: root of this (sub)tree
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001080 *
1081 * Returns: 0 on success or error code
1082 */
1083
Al Viro34c80b12011-12-08 21:32:45 -05001084static int gfs2_show_options(struct seq_file *s, struct dentry *root)
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001085{
Al Viro34c80b12011-12-08 21:32:45 -05001086 struct gfs2_sbd *sdp = root->d_sb->s_fs_info;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001087 struct gfs2_args *args = &sdp->sd_args;
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001088 int val;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001089
Al Viro34c80b12011-12-08 21:32:45 -05001090 if (is_ancestor(root, sdp->sd_master_dir))
Fabian Frederickeaebded2014-07-02 22:08:46 +02001091 seq_puts(s, ",meta");
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001092 if (args->ar_lockproto[0])
Kees Cooka068acf2015-09-04 15:44:57 -07001093 seq_show_option(s, "lockproto", args->ar_lockproto);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001094 if (args->ar_locktable[0])
Kees Cooka068acf2015-09-04 15:44:57 -07001095 seq_show_option(s, "locktable", args->ar_locktable);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001096 if (args->ar_hostdata[0])
Kees Cooka068acf2015-09-04 15:44:57 -07001097 seq_show_option(s, "hostdata", args->ar_hostdata);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001098 if (args->ar_spectator)
Fabian Frederickeaebded2014-07-02 22:08:46 +02001099 seq_puts(s, ",spectator");
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001100 if (args->ar_localflocks)
Fabian Frederickeaebded2014-07-02 22:08:46 +02001101 seq_puts(s, ",localflocks");
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001102 if (args->ar_debug)
Fabian Frederickeaebded2014-07-02 22:08:46 +02001103 seq_puts(s, ",debug");
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001104 if (args->ar_posix_acl)
Fabian Frederickeaebded2014-07-02 22:08:46 +02001105 seq_puts(s, ",acl");
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001106 if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
1107 char *state;
1108 switch (args->ar_quota) {
1109 case GFS2_QUOTA_OFF:
1110 state = "off";
1111 break;
1112 case GFS2_QUOTA_ACCOUNT:
1113 state = "account";
1114 break;
1115 case GFS2_QUOTA_ON:
1116 state = "on";
1117 break;
1118 default:
1119 state = "unknown";
1120 break;
1121 }
1122 seq_printf(s, ",quota=%s", state);
1123 }
1124 if (args->ar_suiddir)
Fabian Frederickeaebded2014-07-02 22:08:46 +02001125 seq_puts(s, ",suiddir");
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001126 if (args->ar_data != GFS2_DATA_DEFAULT) {
1127 char *state;
1128 switch (args->ar_data) {
1129 case GFS2_DATA_WRITEBACK:
1130 state = "writeback";
1131 break;
1132 case GFS2_DATA_ORDERED:
1133 state = "ordered";
1134 break;
1135 default:
1136 state = "unknown";
1137 break;
1138 }
1139 seq_printf(s, ",data=%s", state);
1140 }
1141 if (args->ar_discard)
Fabian Frederickeaebded2014-07-02 22:08:46 +02001142 seq_puts(s, ",discard");
Benjamin Marzinski5e687ea2010-05-04 14:29:16 -05001143 val = sdp->sd_tune.gt_logd_secs;
1144 if (val != 30)
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001145 seq_printf(s, ",commit=%d", val);
1146 val = sdp->sd_tune.gt_statfs_quantum;
1147 if (val != 30)
1148 seq_printf(s, ",statfs_quantum=%d", val);
Steven Whitehouse2b9731e2012-08-20 17:07:49 +01001149 else if (sdp->sd_tune.gt_statfs_slow)
1150 seq_puts(s, ",statfs_quantum=0");
Benjamin Marzinski3d3c10f2009-10-20 02:39:44 -05001151 val = sdp->sd_tune.gt_quota_quantum;
1152 if (val != 60)
1153 seq_printf(s, ",quota_quantum=%d", val);
1154 if (args->ar_statfs_percent)
1155 seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
Bob Petersond34843d2009-08-24 10:44:18 +01001156 if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
1157 const char *state;
1158
1159 switch (args->ar_errors) {
1160 case GFS2_ERRORS_WITHDRAW:
1161 state = "withdraw";
1162 break;
1163 case GFS2_ERRORS_PANIC:
1164 state = "panic";
1165 break;
1166 default:
1167 state = "unknown";
1168 break;
1169 }
1170 seq_printf(s, ",errors=%s", state);
1171 }
Steven Whitehousecdcfde62009-10-30 10:48:53 +00001172 if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
Fabian Frederickeaebded2014-07-02 22:08:46 +02001173 seq_puts(s, ",nobarrier");
Steven Whitehouse913a71d2010-05-06 11:03:29 +01001174 if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
Fabian Frederickeaebded2014-07-02 22:08:46 +02001175 seq_puts(s, ",demote_interface_used");
Benjamin Marzinski90306c42012-05-29 23:01:09 -05001176 if (args->ar_rgrplvb)
Fabian Frederickeaebded2014-07-02 22:08:46 +02001177 seq_puts(s, ",rgrplvb");
Benjamin Marzinski471f3db2015-12-01 08:46:55 -06001178 if (args->ar_loccookie)
1179 seq_puts(s, ",loccookie");
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001180 return 0;
1181}
1182
Steven Whitehousef42ab082011-04-14 16:50:31 +01001183static void gfs2_final_release_pages(struct gfs2_inode *ip)
1184{
1185 struct inode *inode = &ip->i_inode;
1186 struct gfs2_glock *gl = ip->i_gl;
1187
1188 truncate_inode_pages(gfs2_glock2aspace(ip->i_gl), 0);
1189 truncate_inode_pages(&inode->i_data, 0);
1190
Bob Peterson638803d2019-06-06 07:33:38 -05001191 if (atomic_read(&gl->gl_revokes) == 0) {
Steven Whitehousef42ab082011-04-14 16:50:31 +01001192 clear_bit(GLF_LFLUSH, &gl->gl_flags);
1193 clear_bit(GLF_DIRTY, &gl->gl_flags);
1194 }
1195}
1196
1197static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
1198{
1199 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
Steven Whitehousef42ab082011-04-14 16:50:31 +01001200 struct gfs2_rgrpd *rgd;
Bob Peterson564e12b2011-11-21 13:36:17 -05001201 struct gfs2_holder gh;
Steven Whitehousef42ab082011-04-14 16:50:31 +01001202 int error;
1203
1204 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
Steven Whitehouse94fb7632011-05-09 13:36:10 +01001205 gfs2_consist_inode(ip);
Steven Whitehousef42ab082011-04-14 16:50:31 +01001206 return -EIO;
1207 }
1208
Bob Peterson8e2e0042012-07-19 08:12:40 -04001209 error = gfs2_rindex_update(sdp);
1210 if (error)
1211 return error;
Steven Whitehousef42ab082011-04-14 16:50:31 +01001212
Eric W. Biedermanf4108a62013-01-31 17:49:26 -08001213 error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
Steven Whitehousef42ab082011-04-14 16:50:31 +01001214 if (error)
Bob Peterson5407e242012-05-18 09:28:23 -04001215 return error;
Steven Whitehousef42ab082011-04-14 16:50:31 +01001216
Steven Whitehouse66fc0612012-02-08 12:58:32 +00001217 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
Steven Whitehousef42ab082011-04-14 16:50:31 +01001218 if (!rgd) {
1219 gfs2_consist_inode(ip);
1220 error = -EIO;
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001221 goto out_qs;
Steven Whitehousef42ab082011-04-14 16:50:31 +01001222 }
1223
Bob Peterson564e12b2011-11-21 13:36:17 -05001224 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, &gh);
Steven Whitehousef42ab082011-04-14 16:50:31 +01001225 if (error)
Steven Whitehouse8339ee52011-08-31 16:38:29 +01001226 goto out_qs;
Steven Whitehousef42ab082011-04-14 16:50:31 +01001227
Steven Whitehouse4667a0e2011-04-18 14:18:09 +01001228 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA,
1229 sdp->sd_jdesc->jd_blocks);
Steven Whitehousef42ab082011-04-14 16:50:31 +01001230 if (error)
1231 goto out_rg_gunlock;
1232
1233 gfs2_free_di(rgd, ip);
1234
1235 gfs2_final_release_pages(ip);
1236
1237 gfs2_trans_end(sdp);
1238
1239out_rg_gunlock:
Bob Peterson564e12b2011-11-21 13:36:17 -05001240 gfs2_glock_dq_uninit(&gh);
Steven Whitehousef42ab082011-04-14 16:50:31 +01001241out_qs:
1242 gfs2_quota_unhold(ip);
Steven Whitehousef42ab082011-04-14 16:50:31 +01001243 return error;
1244}
1245
Steven Whitehouse380f7c62011-07-14 08:59:44 +01001246/**
Andreas Gruenbacher71c1b2132017-08-01 11:45:23 -05001247 * gfs2_glock_put_eventually
1248 * @gl: The glock to put
1249 *
1250 * When under memory pressure, trigger a deferred glock put to make sure we
1251 * won't call into DLM and deadlock. Otherwise, put the glock directly.
1252 */
1253
1254static void gfs2_glock_put_eventually(struct gfs2_glock *gl)
1255{
1256 if (current->flags & PF_MEMALLOC)
1257 gfs2_glock_queue_put(gl);
1258 else
1259 gfs2_glock_put(gl);
1260}
1261
Andreas Gruenbacher9e733302020-01-14 14:59:08 +01001262static bool gfs2_upgrade_iopen_glock(struct inode *inode)
1263{
1264 struct gfs2_inode *ip = GFS2_I(inode);
1265 struct gfs2_sbd *sdp = GFS2_SB(inode);
1266 struct gfs2_holder *gh = &ip->i_iopen_gh;
1267 long timeout = 5 * HZ;
1268 int error;
1269
1270 gh->gh_flags |= GL_NOCACHE;
1271 gfs2_glock_dq_wait(gh);
1272
1273 /*
1274 * If there are no other lock holders, we'll get the lock immediately.
1275 * Otherwise, the other nodes holding the lock will be notified about
1276 * our locking request. If they don't have the inode open, they'll
Andreas Gruenbacher9e8990d2020-01-17 10:53:23 +01001277 * evict the cached inode and release the lock. Otherwise, if they
1278 * poke the inode glock, we'll take this as an indication that they
1279 * still need the iopen glock and that they'll take care of deleting
1280 * the inode when they're done. As a last resort, if another node
1281 * keeps holding the iopen glock without showing any activity on the
1282 * inode glock, we'll eventually time out.
Andreas Gruenbacher9e733302020-01-14 14:59:08 +01001283 *
1284 * Note that we're passing the LM_FLAG_TRY_1CB flag to the first
1285 * locking request as an optimization to notify lock holders as soon as
1286 * possible. Without that flag, they'd be notified implicitly by the
1287 * second locking request.
1288 */
1289
1290 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, gh);
1291 error = gfs2_glock_nq(gh);
1292 if (error != GLR_TRYFAILED)
1293 return !error;
1294
1295 gfs2_holder_reinit(LM_ST_EXCLUSIVE, GL_ASYNC | GL_NOCACHE, gh);
1296 error = gfs2_glock_nq(gh);
1297 if (error)
1298 return false;
1299
1300 timeout = wait_event_interruptible_timeout(sdp->sd_async_glock_wait,
Andreas Gruenbacher9e8990d2020-01-17 10:53:23 +01001301 !test_bit(HIF_WAIT, &gh->gh_iflags) ||
1302 test_bit(GLF_DEMOTE, &ip->i_gl->gl_flags),
Andreas Gruenbacher9e733302020-01-14 14:59:08 +01001303 timeout);
1304 if (!test_bit(HIF_HOLDER, &gh->gh_iflags)) {
1305 gfs2_glock_dq(gh);
1306 return false;
1307 }
1308 return true;
1309}
1310
Andreas Gruenbacher71c1b2132017-08-01 11:45:23 -05001311/**
Steven Whitehouse380f7c62011-07-14 08:59:44 +01001312 * gfs2_evict_inode - Remove an inode from cache
1313 * @inode: The inode to evict
1314 *
1315 * There are three cases to consider:
1316 * 1. i_nlink == 0, we are final opener (and must deallocate)
1317 * 2. i_nlink == 0, we are not the final opener (and cannot deallocate)
1318 * 3. i_nlink > 0
1319 *
1320 * If the fs is read only, then we have to treat all cases as per #3
1321 * since we are unable to do any deallocation. The inode will be
1322 * deallocated by the next read/write node to attempt an allocation
1323 * in the same resource group
1324 *
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001325 * We have to (at the moment) hold the inodes main lock to cover
1326 * the gap between unlocking the shared lock on the iopen lock and
1327 * taking the exclusive lock. I'd rather do a shared -> exclusive
1328 * conversion on the iopen lock, but we can change that later. This
1329 * is safe, just less efficient.
1330 */
1331
Al Virod5c15152010-06-07 11:05:19 -04001332static void gfs2_evict_inode(struct inode *inode)
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001333{
Steven Whitehouse001e8e82011-03-30 14:17:51 +01001334 struct super_block *sb = inode->i_sb;
1335 struct gfs2_sbd *sdp = sb->s_fs_info;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001336 struct gfs2_inode *ip = GFS2_I(inode);
1337 struct gfs2_holder gh;
Bob Petersonee530be2015-12-07 15:13:28 -06001338 struct address_space *metamapping;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001339 int error;
1340
Abhi Das05978802014-03-31 10:33:17 -05001341 if (test_bit(GIF_FREE_VFS_INODE, &ip->i_flags)) {
1342 clear_inode(inode);
1343 return;
1344 }
1345
David Howellsbc98a422017-07-17 08:45:34 +01001346 if (inode->i_nlink || sb_rdonly(sb))
Al Virod5c15152010-06-07 11:05:19 -04001347 goto out;
1348
Andreas Gruenbachere0b62e22017-06-30 08:16:46 -05001349 if (test_bit(GIF_ALLOC_FAILED, &ip->i_flags)) {
1350 BUG_ON(!gfs2_glock_is_locked_by_me(ip->i_gl));
1351 gfs2_holder_mark_uninitialized(&gh);
Andreas Gruenbacher8c7b9262020-01-13 22:16:17 +01001352 goto out_delete;
Andreas Gruenbachere0b62e22017-06-30 08:16:46 -05001353 }
1354
Andreas Gruenbacher8c7b9262020-01-13 22:16:17 +01001355 if (test_bit(GIF_DEFERRED_DELETE, &ip->i_flags))
1356 goto out;
1357
Andreas Gruenbacher6a1c8f62017-08-01 11:49:42 -05001358 /* Deletes should never happen under memory pressure anymore. */
1359 if (WARN_ON_ONCE(current->flags & PF_MEMALLOC))
1360 goto out;
1361
Bob Peterson44ad37d2011-03-17 16:19:58 -04001362 /* Must not read inode block until block type has been verified */
1363 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, &gh);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001364 if (unlikely(error)) {
Bob Peterson240c6232017-07-18 12:36:01 -05001365 glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
Bob Petersona6a4d982013-05-29 11:51:52 -04001366 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
Andreas Gruenbacherd4da3192017-02-22 20:05:09 +01001367 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001368 goto out;
1369 }
1370
Andreas Gruenbacherf286d622020-01-13 21:21:49 +01001371 if (gfs2_inode_already_deleted(ip->i_gl, ip->i_no_formal_ino))
1372 goto out_truncate;
Andreas Gruenbachere0b62e22017-06-30 08:16:46 -05001373 error = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
1374 if (error)
1375 goto out_truncate;
Steven Whitehouseacf7e242009-09-08 18:00:30 +01001376
Bob Peterson44ad37d2011-03-17 16:19:58 -04001377 if (test_bit(GIF_INVALID, &ip->i_flags)) {
1378 error = gfs2_inode_refresh(ip);
1379 if (error)
1380 goto out_truncate;
1381 }
1382
Andreas Gruenbacher71c1b2132017-08-01 11:45:23 -05001383 /*
1384 * The inode may have been recreated in the meantime.
1385 */
1386 if (inode->i_nlink)
1387 goto out_truncate;
1388
Andreas Gruenbacher8c7b9262020-01-13 22:16:17 +01001389out_delete:
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -05001390 if (gfs2_holder_initialized(&ip->i_iopen_gh) &&
Bob Peterson7508abc2015-12-18 11:54:55 -06001391 test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
Andreas Gruenbacher9e733302020-01-14 14:59:08 +01001392 if (!gfs2_upgrade_iopen_glock(inode)) {
1393 gfs2_holder_uninit(&ip->i_iopen_gh);
Bob Peterson7508abc2015-12-18 11:54:55 -06001394 goto out_truncate;
Andreas Gruenbacher9e733302020-01-14 14:59:08 +01001395 }
Bob Peterson7508abc2015-12-18 11:54:55 -06001396 }
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001397
1398 if (S_ISDIR(inode->i_mode) &&
1399 (ip->i_diskflags & GFS2_DIF_EXHASH)) {
1400 error = gfs2_dir_exhash_dealloc(ip);
1401 if (error)
1402 goto out_unlock;
1403 }
1404
1405 if (ip->i_eattr) {
1406 error = gfs2_ea_dealloc(ip);
1407 if (error)
1408 goto out_unlock;
1409 }
1410
1411 if (!gfs2_is_stuffed(ip)) {
1412 error = gfs2_file_dealloc(ip);
1413 if (error)
1414 goto out_unlock;
1415 }
1416
Bob Peterson240c6232017-07-18 12:36:01 -05001417 /* We're about to clear the bitmap for the dinode, but as soon as we
1418 do, gfs2_create_inode can create another inode at the same block
1419 location and try to set gl_object again. We clear gl_object here so
1420 that subsequent inode creates don't see an old gl_object. */
1421 glock_clear_object(ip->i_gl, ip);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001422 error = gfs2_dinode_dealloc(ip);
Andreas Gruenbacherf286d622020-01-13 21:21:49 +01001423 gfs2_inode_remember_delete(ip->i_gl, ip->i_no_formal_ino);
Steven Whitehousef42ab082011-04-14 16:50:31 +01001424 goto out_unlock;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001425
1426out_truncate:
Bob Peterson805c09072018-01-08 10:34:17 -05001427 gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
1428 GFS2_LFC_EVICT_INODE);
Bob Petersonee530be2015-12-07 15:13:28 -06001429 metamapping = gfs2_glock2aspace(ip->i_gl);
Benjamin Marzinski2216db72012-09-20 09:52:58 -05001430 if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) {
Benjamin Marzinski2216db72012-09-20 09:52:58 -05001431 filemap_fdatawrite(metamapping);
1432 filemap_fdatawait(metamapping);
1433 }
Steven Whitehouse40ac2182011-08-02 13:17:27 +01001434 write_inode_now(inode, 1);
Steven Whitehouseb5b24d72011-09-07 10:33:25 +01001435 gfs2_ail_flush(ip->i_gl, 0);
Steven Whitehouse40ac2182011-08-02 13:17:27 +01001436
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001437 error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
1438 if (error)
1439 goto out_unlock;
Steven Whitehouse380f7c62011-07-14 08:59:44 +01001440 /* Needs to be done before glock release & also in a transaction */
1441 truncate_inode_pages(&inode->i_data, 0);
Bob Petersonee530be2015-12-07 15:13:28 -06001442 truncate_inode_pages(metamapping, 0);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001443 gfs2_trans_end(sdp);
1444
1445out_unlock:
Bob Petersona097dc7e2015-07-16 08:28:04 -05001446 if (gfs2_rs_active(&ip->i_res))
1447 gfs2_rs_deltree(&ip->i_res);
Bob Peterson8e2e0042012-07-19 08:12:40 -04001448
Bob Peterson240c6232017-07-18 12:36:01 -05001449 if (gfs2_holder_initialized(&gh)) {
1450 glock_clear_object(ip->i_gl, ip);
Andreas Gruenbachere0b62e22017-06-30 08:16:46 -05001451 gfs2_glock_dq_uninit(&gh);
Bob Peterson240c6232017-07-18 12:36:01 -05001452 }
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001453 if (error && error != GLR_TRYFAILED && error != -EROFS)
Al Virod5c15152010-06-07 11:05:19 -04001454 fs_warn(sdp, "gfs2_evict_inode: %d\n", error);
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001455out:
Johannes Weiner91b0abe2014-04-03 14:47:49 -07001456 truncate_inode_pages_final(&inode->i_data);
Bob Peterson2fba46a2020-02-27 12:47:53 -06001457 if (ip->i_qadata)
1458 gfs2_assert_warn(sdp, ip->i_qadata->qa_ref == 0);
Andreas Gruenbacher15955482020-03-06 10:32:35 -06001459 gfs2_rs_delete(ip, NULL);
Steven Whitehouse45138992013-01-28 09:30:07 +00001460 gfs2_ordered_del_inode(ip);
Jan Karadbd57682012-05-03 14:48:02 +02001461 clear_inode(inode);
Steven Whitehouse17d539f2011-06-15 10:29:37 +01001462 gfs2_dir_hash_inval(ip);
Andreas Gruenbacher40e7e862020-01-24 14:14:46 +01001463 if (ip->i_gl) {
1464 glock_clear_object(ip->i_gl, ip);
1465 wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE);
1466 gfs2_glock_add_to_lru(ip->i_gl);
1467 gfs2_glock_put_eventually(ip->i_gl);
1468 ip->i_gl = NULL;
1469 }
Andreas Gruenbacher6df9f9a2016-06-17 07:31:27 -05001470 if (gfs2_holder_initialized(&ip->i_iopen_gh)) {
Andreas Gruenbacher71c1b2132017-08-01 11:45:23 -05001471 struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
1472
1473 glock_clear_object(gl, ip);
Andreas Gruenbacher40e7e862020-01-24 14:14:46 +01001474 if (test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
1475 ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1476 gfs2_glock_dq(&ip->i_iopen_gh);
1477 }
Andreas Gruenbacher71c1b2132017-08-01 11:45:23 -05001478 gfs2_glock_hold(gl);
Andreas Gruenbacher40e7e862020-01-24 14:14:46 +01001479 gfs2_holder_uninit(&ip->i_iopen_gh);
Andreas Gruenbacher71c1b2132017-08-01 11:45:23 -05001480 gfs2_glock_put_eventually(gl);
Al Virod5c15152010-06-07 11:05:19 -04001481 }
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001482}
1483
1484static struct inode *gfs2_alloc_inode(struct super_block *sb)
1485{
1486 struct gfs2_inode *ip;
1487
1488 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL);
Andreas Gruenbacherd4031252019-07-24 13:05:38 +02001489 if (!ip)
1490 return NULL;
1491 ip->i_flags = 0;
1492 ip->i_gl = NULL;
Andreas Gruenbacher40e7e862020-01-24 14:14:46 +01001493 gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
Andreas Gruenbacherd4031252019-07-24 13:05:38 +02001494 memset(&ip->i_res, 0, sizeof(ip->i_res));
1495 RB_CLEAR_NODE(&ip->i_res.rs_node);
1496 ip->i_rahead = 0;
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001497 return &ip->i_inode;
1498}
1499
Al Viro784494e2019-04-15 19:45:26 -04001500static void gfs2_free_inode(struct inode *inode)
Nick Pigginfa0d7e3d2011-01-07 17:49:49 +11001501{
Al Viro784494e2019-04-15 19:45:26 -04001502 kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode));
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001503}
1504
1505const struct super_operations gfs2_super_ops = {
1506 .alloc_inode = gfs2_alloc_inode,
Al Viro784494e2019-04-15 19:45:26 -04001507 .free_inode = gfs2_free_inode,
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001508 .write_inode = gfs2_write_inode,
Steven Whitehouseab9bbda2011-08-15 14:20:36 +01001509 .dirty_inode = gfs2_dirty_inode,
Al Virod5c15152010-06-07 11:05:19 -04001510 .evict_inode = gfs2_evict_inode,
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001511 .put_super = gfs2_put_super,
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001512 .sync_fs = gfs2_sync_fs,
Benjamin Marzinski2e60d762014-11-13 20:42:04 -06001513 .freeze_super = gfs2_freeze,
1514 .thaw_super = gfs2_unfreeze,
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001515 .statfs = gfs2_statfs,
Steven Whitehouse9e6e0a12009-05-22 10:36:01 +01001516 .drop_inode = gfs2_drop_inode,
1517 .show_options = gfs2_show_options,
1518};
1519