17336d0e6SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only
2b3b94faaSDavid Teigland /*
3b3b94faaSDavid Teigland * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4da6dd40dSBob Peterson * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
5b3b94faaSDavid Teigland */
6b3b94faaSDavid Teigland
7d77d1b58SJoe Perches #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
8d77d1b58SJoe Perches
99e6e0a12SSteven Whitehouse #include <linux/bio.h>
10174cd4b1SIngo Molnar #include <linux/sched/signal.h>
11b3b94faaSDavid Teigland #include <linux/slab.h>
12b3b94faaSDavid Teigland #include <linux/spinlock.h>
13b3b94faaSDavid Teigland #include <linux/completion.h>
14b3b94faaSDavid Teigland #include <linux/buffer_head.h>
159e6e0a12SSteven Whitehouse #include <linux/statfs.h>
169e6e0a12SSteven Whitehouse #include <linux/seq_file.h>
179e6e0a12SSteven Whitehouse #include <linux/mount.h>
189e6e0a12SSteven Whitehouse #include <linux/kthread.h>
199e6e0a12SSteven Whitehouse #include <linux/delay.h>
205c676f6dSSteven Whitehouse #include <linux/gfs2_ondisk.h>
219e6e0a12SSteven Whitehouse #include <linux/crc32.h>
229e6e0a12SSteven Whitehouse #include <linux/time.h>
23e402746aSSteven Whitehouse #include <linux/wait.h>
24a9185b41SChristoph Hellwig #include <linux/writeback.h>
254667a0ecSSteven Whitehouse #include <linux/backing-dev.h>
262e60d768SBenjamin Marzinski #include <linux/kernel.h>
27b3b94faaSDavid Teigland
28b3b94faaSDavid Teigland #include "gfs2.h"
295c676f6dSSteven Whitehouse #include "incore.h"
30b3b94faaSDavid Teigland #include "bmap.h"
31b3b94faaSDavid Teigland #include "dir.h"
32b3b94faaSDavid Teigland #include "glock.h"
33b3b94faaSDavid Teigland #include "glops.h"
34b3b94faaSDavid Teigland #include "inode.h"
35b3b94faaSDavid Teigland #include "log.h"
36b3b94faaSDavid Teigland #include "meta_io.h"
37b3b94faaSDavid Teigland #include "quota.h"
38b3b94faaSDavid Teigland #include "recovery.h"
39b3b94faaSDavid Teigland #include "rgrp.h"
40b3b94faaSDavid Teigland #include "super.h"
41b3b94faaSDavid Teigland #include "trans.h"
425c676f6dSSteven Whitehouse #include "util.h"
439e6e0a12SSteven Whitehouse #include "sys.h"
44307cf6e6SSteven Whitehouse #include "xattr.h"
45f4686c26SAbhi Das #include "lops.h"
469e6e0a12SSteven Whitehouse
4753dbc27eSBob Peterson enum dinode_demise {
4853dbc27eSBob Peterson SHOULD_DELETE_DINODE,
4953dbc27eSBob Peterson SHOULD_NOT_DELETE_DINODE,
5053dbc27eSBob Peterson SHOULD_DEFER_EVICTION,
5153dbc27eSBob Peterson };
5253dbc27eSBob Peterson
53fefc03bfSSteven Whitehouse /**
54fefc03bfSSteven Whitehouse * gfs2_jindex_free - Clear all the journal index information
55fefc03bfSSteven Whitehouse * @sdp: The GFS2 superblock
56fefc03bfSSteven Whitehouse *
57fefc03bfSSteven Whitehouse */
58fefc03bfSSteven Whitehouse
gfs2_jindex_free(struct gfs2_sbd * sdp)59fefc03bfSSteven Whitehouse void gfs2_jindex_free(struct gfs2_sbd *sdp)
60fefc03bfSSteven Whitehouse {
61b50f227bSSteven Whitehouse struct list_head list;
62fefc03bfSSteven Whitehouse struct gfs2_jdesc *jd;
63fefc03bfSSteven Whitehouse
64fefc03bfSSteven Whitehouse spin_lock(&sdp->sd_jindex_spin);
65fefc03bfSSteven Whitehouse list_add(&list, &sdp->sd_jindex_list);
66fefc03bfSSteven Whitehouse list_del_init(&sdp->sd_jindex_list);
67fefc03bfSSteven Whitehouse sdp->sd_journals = 0;
68fefc03bfSSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin);
69fefc03bfSSteven Whitehouse
70601ef0d5SBob Peterson sdp->sd_jdesc = NULL;
71fefc03bfSSteven Whitehouse while (!list_empty(&list)) {
72969183bcSAndreas Gruenbacher jd = list_first_entry(&list, struct gfs2_jdesc, jd_list);
73b50f227bSSteven Whitehouse gfs2_free_journal_extents(jd);
74fefc03bfSSteven Whitehouse list_del(&jd->jd_list);
75fefc03bfSSteven Whitehouse iput(jd->jd_inode);
76601ef0d5SBob Peterson jd->jd_inode = NULL;
77fefc03bfSSteven Whitehouse kfree(jd);
78fefc03bfSSteven Whitehouse }
79fefc03bfSSteven Whitehouse }
80fefc03bfSSteven Whitehouse
jdesc_find_i(struct list_head * head,unsigned int jid)81b3b94faaSDavid Teigland static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid)
82b3b94faaSDavid Teigland {
83b3b94faaSDavid Teigland struct gfs2_jdesc *jd;
84b3b94faaSDavid Teigland
85b3b94faaSDavid Teigland list_for_each_entry(jd, head, jd_list) {
86736b2f77SAndreas Gruenbacher if (jd->jd_jid == jid)
87b3b94faaSDavid Teigland return jd;
88b3b94faaSDavid Teigland }
89736b2f77SAndreas Gruenbacher return NULL;
90736b2f77SAndreas Gruenbacher }
91b3b94faaSDavid Teigland
gfs2_jdesc_find(struct gfs2_sbd * sdp,unsigned int jid)92b3b94faaSDavid Teigland struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid)
93b3b94faaSDavid Teigland {
94b3b94faaSDavid Teigland struct gfs2_jdesc *jd;
95b3b94faaSDavid Teigland
96b3b94faaSDavid Teigland spin_lock(&sdp->sd_jindex_spin);
97b3b94faaSDavid Teigland jd = jdesc_find_i(&sdp->sd_jindex_list, jid);
98b3b94faaSDavid Teigland spin_unlock(&sdp->sd_jindex_spin);
99b3b94faaSDavid Teigland
100b3b94faaSDavid Teigland return jd;
101b3b94faaSDavid Teigland }
102b3b94faaSDavid Teigland
gfs2_jdesc_check(struct gfs2_jdesc * jd)103b3b94faaSDavid Teigland int gfs2_jdesc_check(struct gfs2_jdesc *jd)
104b3b94faaSDavid Teigland {
105feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(jd->jd_inode);
106feaa7bbaSSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
107a2e0f799SSteven Whitehouse u64 size = i_size_read(jd->jd_inode);
108b3b94faaSDavid Teigland
10947a9a527SFabian Frederick if (gfs2_check_internal_file_size(jd->jd_inode, 8 << 20, BIT(30)))
110b3b94faaSDavid Teigland return -EIO;
111b3b94faaSDavid Teigland
112a2e0f799SSteven Whitehouse jd->jd_blocks = size >> sdp->sd_sb.sb_bsize_shift;
113a2e0f799SSteven Whitehouse
114a2e0f799SSteven Whitehouse if (gfs2_write_alloc_required(ip, 0, size)) {
115b3b94faaSDavid Teigland gfs2_consist_inode(ip);
116461cb419SBob Peterson return -EIO;
117b3b94faaSDavid Teigland }
118b3b94faaSDavid Teigland
119461cb419SBob Peterson return 0;
120b3b94faaSDavid Teigland }
121b3b94faaSDavid Teigland
122b3b94faaSDavid Teigland /**
123b3b94faaSDavid Teigland * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one
124b3b94faaSDavid Teigland * @sdp: the filesystem
125b3b94faaSDavid Teigland *
126b3b94faaSDavid Teigland * Returns: errno
127b3b94faaSDavid Teigland */
128b3b94faaSDavid Teigland
gfs2_make_fs_rw(struct gfs2_sbd * sdp)129b3b94faaSDavid Teigland int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
130b3b94faaSDavid Teigland {
131feaa7bbaSSteven Whitehouse struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
1325c676f6dSSteven Whitehouse struct gfs2_glock *j_gl = ip->i_gl;
13355167622SAl Viro struct gfs2_log_header_host head;
134b3b94faaSDavid Teigland int error;
135b3b94faaSDavid Teigland
1361a14d3a6SSteven Whitehouse j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
137d6b412c5SAndreas Gruenbacher if (gfs2_withdrawing_or_withdrawn(sdp))
138a28dc123SBob Peterson return -EIO;
139b3b94faaSDavid Teigland
140f4686c26SAbhi Das error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
141b66f723bSAndreas Gruenbacher if (error) {
142b66f723bSAndreas Gruenbacher gfs2_consist(sdp);
143a28dc123SBob Peterson return error;
144b66f723bSAndreas Gruenbacher }
145b3b94faaSDavid Teigland
146b3b94faaSDavid Teigland if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
147b3b94faaSDavid Teigland gfs2_consist(sdp);
148a28dc123SBob Peterson return -EIO;
149b3b94faaSDavid Teigland }
150b3b94faaSDavid Teigland
151b3b94faaSDavid Teigland /* Initialize some head of the log stuff */
152b3b94faaSDavid Teigland sdp->sd_log_sequence = head.lh_sequence + 1;
153b3b94faaSDavid Teigland gfs2_log_pointers_init(sdp, head.lh_blkno);
154b3b94faaSDavid Teigland
155b3b94faaSDavid Teigland error = gfs2_quota_init(sdp);
156d6b412c5SAndreas Gruenbacher if (!error && gfs2_withdrawing_or_withdrawn(sdp))
157b66f723bSAndreas Gruenbacher error = -EIO;
158b66f723bSAndreas Gruenbacher if (!error)
159b3b94faaSDavid Teigland set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
160b3b94faaSDavid Teigland return error;
161b3b94faaSDavid Teigland }
162b3b94faaSDavid Teigland
gfs2_statfs_change_in(struct gfs2_statfs_change_host * sc,const void * buf)1631946f70aSBenjamin Marzinski void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf)
164bb8d8a6fSSteven Whitehouse {
165bb8d8a6fSSteven Whitehouse const struct gfs2_statfs_change *str = buf;
166bb8d8a6fSSteven Whitehouse
167bb8d8a6fSSteven Whitehouse sc->sc_total = be64_to_cpu(str->sc_total);
168bb8d8a6fSSteven Whitehouse sc->sc_free = be64_to_cpu(str->sc_free);
169bb8d8a6fSSteven Whitehouse sc->sc_dinodes = be64_to_cpu(str->sc_dinodes);
170bb8d8a6fSSteven Whitehouse }
171bb8d8a6fSSteven Whitehouse
gfs2_statfs_change_out(const struct gfs2_statfs_change_host * sc,void * buf)17273092698SAbhi Das void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf)
173bb8d8a6fSSteven Whitehouse {
174bb8d8a6fSSteven Whitehouse struct gfs2_statfs_change *str = buf;
175bb8d8a6fSSteven Whitehouse
176bb8d8a6fSSteven Whitehouse str->sc_total = cpu_to_be64(sc->sc_total);
177bb8d8a6fSSteven Whitehouse str->sc_free = cpu_to_be64(sc->sc_free);
178bb8d8a6fSSteven Whitehouse str->sc_dinodes = cpu_to_be64(sc->sc_dinodes);
179bb8d8a6fSSteven Whitehouse }
180bb8d8a6fSSteven Whitehouse
gfs2_statfs_init(struct gfs2_sbd * sdp)181b3b94faaSDavid Teigland int gfs2_statfs_init(struct gfs2_sbd *sdp)
182b3b94faaSDavid Teigland {
183feaa7bbaSSteven Whitehouse struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
184bd209cc0SAl Viro struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
185bd209cc0SAl Viro struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
18670c11ba8SBob Peterson struct buffer_head *m_bh;
187b3b94faaSDavid Teigland struct gfs2_holder gh;
188b3b94faaSDavid Teigland int error;
189b3b94faaSDavid Teigland
190b3b94faaSDavid Teigland error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
191b3b94faaSDavid Teigland &gh);
192b3b94faaSDavid Teigland if (error)
193b3b94faaSDavid Teigland return error;
194b3b94faaSDavid Teigland
195b3b94faaSDavid Teigland error = gfs2_meta_inode_buffer(m_ip, &m_bh);
196b3b94faaSDavid Teigland if (error)
197b3b94faaSDavid Teigland goto out;
198b3b94faaSDavid Teigland
199b3b94faaSDavid Teigland if (sdp->sd_args.ar_spectator) {
200b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin);
201b3b94faaSDavid Teigland gfs2_statfs_change_in(m_sc, m_bh->b_data +
202b3b94faaSDavid Teigland sizeof(struct gfs2_dinode));
203b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin);
204b3b94faaSDavid Teigland } else {
205b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin);
206b3b94faaSDavid Teigland gfs2_statfs_change_in(m_sc, m_bh->b_data +
207b3b94faaSDavid Teigland sizeof(struct gfs2_dinode));
20870c11ba8SBob Peterson gfs2_statfs_change_in(l_sc, sdp->sd_sc_bh->b_data +
209b3b94faaSDavid Teigland sizeof(struct gfs2_dinode));
210b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin);
211b3b94faaSDavid Teigland
212b3b94faaSDavid Teigland }
213b3b94faaSDavid Teigland
214b3b94faaSDavid Teigland brelse(m_bh);
215b3b94faaSDavid Teigland out:
216b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&gh);
217b3b94faaSDavid Teigland return 0;
218b3b94faaSDavid Teigland }
219b3b94faaSDavid Teigland
gfs2_statfs_change(struct gfs2_sbd * sdp,s64 total,s64 free,s64 dinodes)220cd915493SSteven Whitehouse void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free,
221cd915493SSteven Whitehouse s64 dinodes)
222b3b94faaSDavid Teigland {
223feaa7bbaSSteven Whitehouse struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
224bd209cc0SAl Viro struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
2253d3c10f2SBenjamin Marzinski struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
226c14f5735SBenjamin Marzinski s64 x, y;
227c14f5735SBenjamin Marzinski int need_sync = 0;
228b3b94faaSDavid Teigland
22970c11ba8SBob Peterson gfs2_trans_add_meta(l_ip->i_gl, sdp->sd_sc_bh);
230b3b94faaSDavid Teigland
231b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin);
232b3b94faaSDavid Teigland l_sc->sc_total += total;
233b3b94faaSDavid Teigland l_sc->sc_free += free;
234b3b94faaSDavid Teigland l_sc->sc_dinodes += dinodes;
23570c11ba8SBob Peterson gfs2_statfs_change_out(l_sc, sdp->sd_sc_bh->b_data +
23670c11ba8SBob Peterson sizeof(struct gfs2_dinode));
237c14f5735SBenjamin Marzinski if (sdp->sd_args.ar_statfs_percent) {
238c14f5735SBenjamin Marzinski x = 100 * l_sc->sc_free;
239c14f5735SBenjamin Marzinski y = m_sc->sc_free * sdp->sd_args.ar_statfs_percent;
240c14f5735SBenjamin Marzinski if (x >= y || x <= -y)
241c14f5735SBenjamin Marzinski need_sync = 1;
242c14f5735SBenjamin Marzinski }
243b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin);
244b3b94faaSDavid Teigland
245c14f5735SBenjamin Marzinski if (need_sync)
2463d3c10f2SBenjamin Marzinski gfs2_wake_up_statfs(sdp);
247b3b94faaSDavid Teigland }
248b3b94faaSDavid Teigland
update_statfs(struct gfs2_sbd * sdp,struct buffer_head * m_bh)24970c11ba8SBob Peterson void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh)
2501946f70aSBenjamin Marzinski {
2511946f70aSBenjamin Marzinski struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
2521946f70aSBenjamin Marzinski struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
2531946f70aSBenjamin Marzinski struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
2541946f70aSBenjamin Marzinski struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
2551946f70aSBenjamin Marzinski
25670c11ba8SBob Peterson gfs2_trans_add_meta(l_ip->i_gl, sdp->sd_sc_bh);
257901c6c66SBob Peterson gfs2_trans_add_meta(m_ip->i_gl, m_bh);
2581946f70aSBenjamin Marzinski
2591946f70aSBenjamin Marzinski spin_lock(&sdp->sd_statfs_spin);
2601946f70aSBenjamin Marzinski m_sc->sc_total += l_sc->sc_total;
2611946f70aSBenjamin Marzinski m_sc->sc_free += l_sc->sc_free;
2621946f70aSBenjamin Marzinski m_sc->sc_dinodes += l_sc->sc_dinodes;
2631946f70aSBenjamin Marzinski memset(l_sc, 0, sizeof(struct gfs2_statfs_change));
26470c11ba8SBob Peterson memset(sdp->sd_sc_bh->b_data + sizeof(struct gfs2_dinode),
2651946f70aSBenjamin Marzinski 0, sizeof(struct gfs2_statfs_change));
2661946f70aSBenjamin Marzinski gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode));
267901c6c66SBob Peterson spin_unlock(&sdp->sd_statfs_spin);
2681946f70aSBenjamin Marzinski }
2691946f70aSBenjamin Marzinski
gfs2_statfs_sync(struct super_block * sb,int type)2708c42d637SSteven Whitehouse int gfs2_statfs_sync(struct super_block *sb, int type)
271b3b94faaSDavid Teigland {
2728c42d637SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info;
273feaa7bbaSSteven Whitehouse struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
274bd209cc0SAl Viro struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
275bd209cc0SAl Viro struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
276b3b94faaSDavid Teigland struct gfs2_holder gh;
27770c11ba8SBob Peterson struct buffer_head *m_bh;
278b3b94faaSDavid Teigland int error;
279b3b94faaSDavid Teigland
280b3b94faaSDavid Teigland error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE,
281b3b94faaSDavid Teigland &gh);
282b3b94faaSDavid Teigland if (error)
2832e60d768SBenjamin Marzinski goto out;
284b3b94faaSDavid Teigland
285b3b94faaSDavid Teigland error = gfs2_meta_inode_buffer(m_ip, &m_bh);
286b3b94faaSDavid Teigland if (error)
2872e60d768SBenjamin Marzinski goto out_unlock;
288b3b94faaSDavid Teigland
289b3b94faaSDavid Teigland spin_lock(&sdp->sd_statfs_spin);
290b3b94faaSDavid Teigland gfs2_statfs_change_in(m_sc, m_bh->b_data +
291b3b94faaSDavid Teigland sizeof(struct gfs2_dinode));
292b3b94faaSDavid Teigland if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) {
293b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin);
294b3b94faaSDavid Teigland goto out_bh;
295b3b94faaSDavid Teigland }
296b3b94faaSDavid Teigland spin_unlock(&sdp->sd_statfs_spin);
297b3b94faaSDavid Teigland
29870c11ba8SBob Peterson error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
299b3b94faaSDavid Teigland if (error)
300b3b94faaSDavid Teigland goto out_bh;
301b3b94faaSDavid Teigland
30270c11ba8SBob Peterson update_statfs(sdp, m_bh);
3033d3c10f2SBenjamin Marzinski sdp->sd_statfs_force_sync = 0;
304b3b94faaSDavid Teigland
305b3b94faaSDavid Teigland gfs2_trans_end(sdp);
306b3b94faaSDavid Teigland
307b3b94faaSDavid Teigland out_bh:
308b3b94faaSDavid Teigland brelse(m_bh);
3092e60d768SBenjamin Marzinski out_unlock:
310b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&gh);
3112e60d768SBenjamin Marzinski out:
312b3b94faaSDavid Teigland return error;
313b3b94faaSDavid Teigland }
314b3b94faaSDavid Teigland
315b3b94faaSDavid Teigland struct lfcc {
316b3b94faaSDavid Teigland struct list_head list;
317b3b94faaSDavid Teigland struct gfs2_holder gh;
318b3b94faaSDavid Teigland };
319b3b94faaSDavid Teigland
320b3b94faaSDavid Teigland /**
321b3b94faaSDavid Teigland * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all
322b3b94faaSDavid Teigland * journals are clean
323b3b94faaSDavid Teigland * @sdp: the file system
324b3b94faaSDavid Teigland *
325b3b94faaSDavid Teigland * Returns: errno
326b3b94faaSDavid Teigland */
327b3b94faaSDavid Teigland
gfs2_lock_fs_check_clean(struct gfs2_sbd * sdp)32852b1cdcbSBob Peterson static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp)
329b3b94faaSDavid Teigland {
3305c676f6dSSteven Whitehouse struct gfs2_inode *ip;
331b3b94faaSDavid Teigland struct gfs2_jdesc *jd;
332b3b94faaSDavid Teigland struct lfcc *lfcc;
333b3b94faaSDavid Teigland LIST_HEAD(list);
33455167622SAl Viro struct gfs2_log_header_host lh;
335b77b4a48SAndreas Gruenbacher int error, error2;
336b77b4a48SAndreas Gruenbacher
337b77b4a48SAndreas Gruenbacher /*
338b77b4a48SAndreas Gruenbacher * Grab all the journal glocks in SH mode. We are *probably* doing
339b77b4a48SAndreas Gruenbacher * that to prevent recovery.
340b77b4a48SAndreas Gruenbacher */
341b3b94faaSDavid Teigland
342b3b94faaSDavid Teigland list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
343b3b94faaSDavid Teigland lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL);
344b3b94faaSDavid Teigland if (!lfcc) {
345b3b94faaSDavid Teigland error = -ENOMEM;
346b3b94faaSDavid Teigland goto out;
347b3b94faaSDavid Teigland }
348feaa7bbaSSteven Whitehouse ip = GFS2_I(jd->jd_inode);
349feaa7bbaSSteven Whitehouse error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh);
350b3b94faaSDavid Teigland if (error) {
351b3b94faaSDavid Teigland kfree(lfcc);
352b3b94faaSDavid Teigland goto out;
353b3b94faaSDavid Teigland }
354b3b94faaSDavid Teigland list_add(&lfcc->list, &list);
355b3b94faaSDavid Teigland }
356b3b94faaSDavid Teigland
357b77b4a48SAndreas Gruenbacher gfs2_freeze_unlock(&sdp->sd_freeze_gh);
358b77b4a48SAndreas Gruenbacher
35924972557SBenjamin Marzinski error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_EXCLUSIVE,
360ebdc416cSAndreas Gruenbacher LM_FLAG_NOEXP | GL_NOPID,
361ebdc416cSAndreas Gruenbacher &sdp->sd_freeze_gh);
36252b1cdcbSBob Peterson if (error)
363b77b4a48SAndreas Gruenbacher goto relock_shared;
364b3b94faaSDavid Teigland
365b3b94faaSDavid Teigland list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
366b3b94faaSDavid Teigland error = gfs2_jdesc_check(jd);
367b3b94faaSDavid Teigland if (error)
368b3b94faaSDavid Teigland break;
369f4686c26SAbhi Das error = gfs2_find_jhead(jd, &lh, false);
370b3b94faaSDavid Teigland if (error)
371b3b94faaSDavid Teigland break;
372b3b94faaSDavid Teigland if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
373b3b94faaSDavid Teigland error = -EBUSY;
374b3b94faaSDavid Teigland break;
375b3b94faaSDavid Teigland }
376b3b94faaSDavid Teigland }
377b3b94faaSDavid Teigland
378b77b4a48SAndreas Gruenbacher if (!error)
379b77b4a48SAndreas Gruenbacher goto out; /* success */
380b77b4a48SAndreas Gruenbacher
381c77b52c0SBob Peterson gfs2_freeze_unlock(&sdp->sd_freeze_gh);
382b3b94faaSDavid Teigland
383b77b4a48SAndreas Gruenbacher relock_shared:
3846c7410f4SAndreas Gruenbacher error2 = gfs2_freeze_lock_shared(sdp);
385b77b4a48SAndreas Gruenbacher gfs2_assert_withdraw(sdp, !error2);
386b77b4a48SAndreas Gruenbacher
387b3b94faaSDavid Teigland out:
388b3b94faaSDavid Teigland while (!list_empty(&list)) {
389969183bcSAndreas Gruenbacher lfcc = list_first_entry(&list, struct lfcc, list);
390b3b94faaSDavid Teigland list_del(&lfcc->list);
391b3b94faaSDavid Teigland gfs2_glock_dq_uninit(&lfcc->gh);
392b3b94faaSDavid Teigland kfree(lfcc);
393b3b94faaSDavid Teigland }
394b3b94faaSDavid Teigland return error;
395b3b94faaSDavid Teigland }
396b3b94faaSDavid Teigland
gfs2_dinode_out(const struct gfs2_inode * ip,void * buf)3979eed04cdSSteven Whitehouse void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
3989eed04cdSSteven Whitehouse {
3997db35444SAndreas Gruenbacher const struct inode *inode = &ip->i_inode;
4009eed04cdSSteven Whitehouse struct gfs2_dinode *str = buf;
4019eed04cdSSteven Whitehouse
4029eed04cdSSteven Whitehouse str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
4039eed04cdSSteven Whitehouse str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
4049eed04cdSSteven Whitehouse str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
4059eed04cdSSteven Whitehouse str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
4069eed04cdSSteven Whitehouse str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
4077db35444SAndreas Gruenbacher str->di_mode = cpu_to_be32(inode->i_mode);
4087db35444SAndreas Gruenbacher str->di_uid = cpu_to_be32(i_uid_read(inode));
4097db35444SAndreas Gruenbacher str->di_gid = cpu_to_be32(i_gid_read(inode));
4107db35444SAndreas Gruenbacher str->di_nlink = cpu_to_be32(inode->i_nlink);
4117db35444SAndreas Gruenbacher str->di_size = cpu_to_be64(i_size_read(inode));
4127db35444SAndreas Gruenbacher str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(inode));
4137db35444SAndreas Gruenbacher str->di_atime = cpu_to_be64(inode->i_atime.tv_sec);
4147db35444SAndreas Gruenbacher str->di_mtime = cpu_to_be64(inode->i_mtime.tv_sec);
4158a8b8d91SJeff Layton str->di_ctime = cpu_to_be64(inode_get_ctime(inode).tv_sec);
4169eed04cdSSteven Whitehouse
4179eed04cdSSteven Whitehouse str->di_goal_meta = cpu_to_be64(ip->i_goal);
4189eed04cdSSteven Whitehouse str->di_goal_data = cpu_to_be64(ip->i_goal);
4199eed04cdSSteven Whitehouse str->di_generation = cpu_to_be64(ip->i_generation);
4209eed04cdSSteven Whitehouse
4219eed04cdSSteven Whitehouse str->di_flags = cpu_to_be32(ip->i_diskflags);
4229eed04cdSSteven Whitehouse str->di_height = cpu_to_be16(ip->i_height);
4237db35444SAndreas Gruenbacher str->di_payload_format = cpu_to_be32(S_ISDIR(inode->i_mode) &&
4249eed04cdSSteven Whitehouse !(ip->i_diskflags & GFS2_DIF_EXHASH) ?
4259eed04cdSSteven Whitehouse GFS2_FORMAT_DE : 0);
4269eed04cdSSteven Whitehouse str->di_depth = cpu_to_be16(ip->i_depth);
4279eed04cdSSteven Whitehouse str->di_entries = cpu_to_be32(ip->i_entries);
4289eed04cdSSteven Whitehouse
4299eed04cdSSteven Whitehouse str->di_eattr = cpu_to_be64(ip->i_eattr);
4307db35444SAndreas Gruenbacher str->di_atime_nsec = cpu_to_be32(inode->i_atime.tv_nsec);
4317db35444SAndreas Gruenbacher str->di_mtime_nsec = cpu_to_be32(inode->i_mtime.tv_nsec);
4328a8b8d91SJeff Layton str->di_ctime_nsec = cpu_to_be32(inode_get_ctime(inode).tv_nsec);
4339eed04cdSSteven Whitehouse }
4349e6e0a12SSteven Whitehouse
4359e6e0a12SSteven Whitehouse /**
4369e6e0a12SSteven Whitehouse * gfs2_write_inode - Make sure the inode is stable on the disk
4379e6e0a12SSteven Whitehouse * @inode: The inode
4381027efaaSSteven Whitehouse * @wbc: The writeback control structure
4399e6e0a12SSteven Whitehouse *
4409e6e0a12SSteven Whitehouse * Returns: errno
4419e6e0a12SSteven Whitehouse */
4429e6e0a12SSteven Whitehouse
gfs2_write_inode(struct inode * inode,struct writeback_control * wbc)443a9185b41SChristoph Hellwig static int gfs2_write_inode(struct inode *inode, struct writeback_control *wbc)
4449e6e0a12SSteven Whitehouse {
4459e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode);
4469e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode);
4471027efaaSSteven Whitehouse struct address_space *metamapping = gfs2_glock2aspace(ip->i_gl);
448de1414a6SChristoph Hellwig struct backing_dev_info *bdi = inode_to_bdi(metamapping->host);
449ab9bbda0SSteven Whitehouse int ret = 0;
450adbc3ddfSBob Peterson bool flush_all = (wbc->sync_mode == WB_SYNC_ALL || gfs2_is_jdata(ip));
4519e6e0a12SSteven Whitehouse
452adbc3ddfSBob Peterson if (flush_all)
453c1696fb8SBob Peterson gfs2_log_flush(GFS2_SB(inode), ip->i_gl,
454805c0907SBob Peterson GFS2_LOG_HEAD_FLUSH_NORMAL |
455805c0907SBob Peterson GFS2_LFC_WRITE_INODE);
456a88a341aSTejun Heo if (bdi->wb.dirty_exceeded)
4574667a0ecSSteven Whitehouse gfs2_ail1_flush(sdp, wbc);
4581d4ec642SSteven Whitehouse else
4591d4ec642SSteven Whitehouse filemap_fdatawrite(metamapping);
460adbc3ddfSBob Peterson if (flush_all)
4611027efaaSSteven Whitehouse ret = filemap_fdatawait(metamapping);
4621027efaaSSteven Whitehouse if (ret)
4631027efaaSSteven Whitehouse mark_inode_dirty_sync(inode);
464957a7acdSAbhi Das else {
465957a7acdSAbhi Das spin_lock(&inode->i_lock);
466957a7acdSAbhi Das if (!(inode->i_flags & I_DIRTY))
467957a7acdSAbhi Das gfs2_ordered_del_inode(ip);
468957a7acdSAbhi Das spin_unlock(&inode->i_lock);
469957a7acdSAbhi Das }
4709e6e0a12SSteven Whitehouse return ret;
4719e6e0a12SSteven Whitehouse }
4729e6e0a12SSteven Whitehouse
4739e6e0a12SSteven Whitehouse /**
474ab9bbda0SSteven Whitehouse * gfs2_dirty_inode - check for atime updates
475ab9bbda0SSteven Whitehouse * @inode: The inode in question
476ab9bbda0SSteven Whitehouse * @flags: The type of dirty
477ab9bbda0SSteven Whitehouse *
478ab9bbda0SSteven Whitehouse * Unfortunately it can be called under any combination of inode
479af1abe11SAndreas Gruenbacher * glock and freeze glock, so we have to check carefully.
480ab9bbda0SSteven Whitehouse *
481ab9bbda0SSteven Whitehouse * At the moment this deals only with atime - it should be possible
482ab9bbda0SSteven Whitehouse * to expand that role in future, once a review of the locking has
483ab9bbda0SSteven Whitehouse * been carried out.
484ab9bbda0SSteven Whitehouse */
485ab9bbda0SSteven Whitehouse
gfs2_dirty_inode(struct inode * inode,int flags)486ab9bbda0SSteven Whitehouse static void gfs2_dirty_inode(struct inode *inode, int flags)
487ab9bbda0SSteven Whitehouse {
488ab9bbda0SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode);
489ab9bbda0SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(inode);
490ab9bbda0SSteven Whitehouse struct buffer_head *bh;
491ab9bbda0SSteven Whitehouse struct gfs2_holder gh;
492ab9bbda0SSteven Whitehouse int need_unlock = 0;
493ab9bbda0SSteven Whitehouse int need_endtrans = 0;
494ab9bbda0SSteven Whitehouse int ret;
495ab9bbda0SSteven Whitehouse
49638552ff6SAndreas Gruenbacher if (unlikely(!ip->i_gl)) {
49738552ff6SAndreas Gruenbacher /* This can only happen during incomplete inode creation. */
49838552ff6SAndreas Gruenbacher BUG_ON(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags));
49938552ff6SAndreas Gruenbacher return;
50038552ff6SAndreas Gruenbacher }
50138552ff6SAndreas Gruenbacher
502d6b412c5SAndreas Gruenbacher if (gfs2_withdrawing_or_withdrawn(sdp))
5030d1c7ae9SBob Peterson return;
504ab9bbda0SSteven Whitehouse if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
505ab9bbda0SSteven Whitehouse ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
506ab9bbda0SSteven Whitehouse if (ret) {
507ab9bbda0SSteven Whitehouse fs_err(sdp, "dirty_inode: glock %d\n", ret);
508e28c02b9SBob Peterson gfs2_dump_glock(NULL, ip->i_gl, true);
509ab9bbda0SSteven Whitehouse return;
510ab9bbda0SSteven Whitehouse }
511ab9bbda0SSteven Whitehouse need_unlock = 1;
5123d162688SBenjamin Marzinski } else if (WARN_ON_ONCE(ip->i_gl->gl_state != LM_ST_EXCLUSIVE))
5133d162688SBenjamin Marzinski return;
514ab9bbda0SSteven Whitehouse
515ab9bbda0SSteven Whitehouse if (current->journal_info == NULL) {
516ab9bbda0SSteven Whitehouse ret = gfs2_trans_begin(sdp, RES_DINODE, 0);
517ab9bbda0SSteven Whitehouse if (ret) {
518ab9bbda0SSteven Whitehouse fs_err(sdp, "dirty_inode: gfs2_trans_begin %d\n", ret);
519ab9bbda0SSteven Whitehouse goto out;
520ab9bbda0SSteven Whitehouse }
521ab9bbda0SSteven Whitehouse need_endtrans = 1;
522ab9bbda0SSteven Whitehouse }
523ab9bbda0SSteven Whitehouse
524ab9bbda0SSteven Whitehouse ret = gfs2_meta_inode_buffer(ip, &bh);
525ab9bbda0SSteven Whitehouse if (ret == 0) {
526350a9b0aSSteven Whitehouse gfs2_trans_add_meta(ip->i_gl, bh);
527ab9bbda0SSteven Whitehouse gfs2_dinode_out(ip, bh->b_data);
528ab9bbda0SSteven Whitehouse brelse(bh);
529ab9bbda0SSteven Whitehouse }
530ab9bbda0SSteven Whitehouse
531ab9bbda0SSteven Whitehouse if (need_endtrans)
532ab9bbda0SSteven Whitehouse gfs2_trans_end(sdp);
533ab9bbda0SSteven Whitehouse out:
534ab9bbda0SSteven Whitehouse if (need_unlock)
535ab9bbda0SSteven Whitehouse gfs2_glock_dq_uninit(&gh);
536ab9bbda0SSteven Whitehouse }
537ab9bbda0SSteven Whitehouse
538ab9bbda0SSteven Whitehouse /**
5399e6e0a12SSteven Whitehouse * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one
5409e6e0a12SSteven Whitehouse * @sdp: the filesystem
5419e6e0a12SSteven Whitehouse *
5429e6e0a12SSteven Whitehouse * Returns: errno
5439e6e0a12SSteven Whitehouse */
5449e6e0a12SSteven Whitehouse
gfs2_make_fs_ro(struct gfs2_sbd * sdp)545eb602521SYang Li void gfs2_make_fs_ro(struct gfs2_sbd *sdp)
5469e6e0a12SSteven Whitehouse {
547601ef0d5SBob Peterson int log_write_allowed = test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags);
5489e6e0a12SSteven Whitehouse
549e7beb8b6SAndreas Gruenbacher if (!test_bit(SDF_KILL, &sdp->sd_flags))
550a0e3cc65SAndreas Gruenbacher gfs2_flush_delete_work(sdp);
5516b388abcSAndreas Gruenbacher
552fe4f7940SAndreas Gruenbacher gfs2_destroy_threads(sdp);
5538ad151c2SSteven Whitehouse
554601ef0d5SBob Peterson if (log_write_allowed) {
555ceed1723SJan Kara gfs2_quota_sync(sdp->sd_vfs, 0);
5568c42d637SSteven Whitehouse gfs2_statfs_sync(sdp->sd_vfs, 0);
5579e6e0a12SSteven Whitehouse
55868ca088dSBob Peterson /* We do two log flushes here. The first one commits dirty inodes
55968ca088dSBob Peterson * and rgrps to the journal, but queues up revokes to the ail list.
56068ca088dSBob Peterson * The second flush writes out and removes the revokes.
56168ca088dSBob Peterson *
56268ca088dSBob Peterson * The first must be done before the FLUSH_SHUTDOWN code
56368ca088dSBob Peterson * clears the LIVE flag, otherwise it will not be able to start
56468ca088dSBob Peterson * a transaction to write its revokes, and the error will cause
56568ca088dSBob Peterson * a withdraw of the file system. */
56668ca088dSBob Peterson gfs2_log_flush(sdp, NULL, GFS2_LFC_MAKE_FS_RO);
567805c0907SBob Peterson gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SHUTDOWN |
568805c0907SBob Peterson GFS2_LFC_MAKE_FS_RO);
569f3708fb5SAndreas Gruenbacher wait_event_timeout(sdp->sd_log_waitq,
570f3708fb5SAndreas Gruenbacher gfs2_log_is_empty(sdp),
571f3708fb5SAndreas Gruenbacher HZ * 5);
572f3708fb5SAndreas Gruenbacher gfs2_assert_warn(sdp, gfs2_log_is_empty(sdp));
573601ef0d5SBob Peterson }
5749e6e0a12SSteven Whitehouse gfs2_quota_cleanup(sdp);
5759e6e0a12SSteven Whitehouse }
5769e6e0a12SSteven Whitehouse
5779e6e0a12SSteven Whitehouse /**
5789e6e0a12SSteven Whitehouse * gfs2_put_super - Unmount the filesystem
5799e6e0a12SSteven Whitehouse * @sb: The VFS superblock
5809e6e0a12SSteven Whitehouse *
5819e6e0a12SSteven Whitehouse */
5829e6e0a12SSteven Whitehouse
gfs2_put_super(struct super_block * sb)5839e6e0a12SSteven Whitehouse static void gfs2_put_super(struct super_block *sb)
5849e6e0a12SSteven Whitehouse {
5859e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info;
5869e6e0a12SSteven Whitehouse struct gfs2_jdesc *jd;
5879e6e0a12SSteven Whitehouse
5889e6e0a12SSteven Whitehouse /* No more recovery requests */
5899e6e0a12SSteven Whitehouse set_bit(SDF_NORECOVERY, &sdp->sd_flags);
5909e6e0a12SSteven Whitehouse smp_mb();
5919e6e0a12SSteven Whitehouse
5929e6e0a12SSteven Whitehouse /* Wait on outstanding recovery */
5939e6e0a12SSteven Whitehouse restart:
5949e6e0a12SSteven Whitehouse spin_lock(&sdp->sd_jindex_spin);
5959e6e0a12SSteven Whitehouse list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) {
5969e6e0a12SSteven Whitehouse if (!test_bit(JDF_RECOVERY, &jd->jd_flags))
5979e6e0a12SSteven Whitehouse continue;
5989e6e0a12SSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin);
5999e6e0a12SSteven Whitehouse wait_on_bit(&jd->jd_flags, JDF_RECOVERY,
60074316201SNeilBrown TASK_UNINTERRUPTIBLE);
6019e6e0a12SSteven Whitehouse goto restart;
6029e6e0a12SSteven Whitehouse }
6039e6e0a12SSteven Whitehouse spin_unlock(&sdp->sd_jindex_spin);
6049e6e0a12SSteven Whitehouse
60508a28272SJuntong Deng if (!sb_rdonly(sb))
606eb602521SYang Li gfs2_make_fs_ro(sdp);
60708a28272SJuntong Deng else {
608d6b412c5SAndreas Gruenbacher if (gfs2_withdrawing_or_withdrawn(sdp))
609fe4f7940SAndreas Gruenbacher gfs2_destroy_threads(sdp);
61008a28272SJuntong Deng
611f66af88eSAndreas Gruenbacher gfs2_quota_cleanup(sdp);
612fe4f7940SAndreas Gruenbacher }
61308a28272SJuntong Deng
6145a61ae14SAndreas Gruenbacher WARN_ON(gfs2_withdrawing(sdp));
6155a61ae14SAndreas Gruenbacher
6169e6e0a12SSteven Whitehouse /* At this point, we're through modifying the disk */
6179e6e0a12SSteven Whitehouse
6189e6e0a12SSteven Whitehouse /* Release stuff */
6199e6e0a12SSteven Whitehouse
620b77b4a48SAndreas Gruenbacher gfs2_freeze_unlock(&sdp->sd_freeze_gh);
621b77b4a48SAndreas Gruenbacher
6229e6e0a12SSteven Whitehouse iput(sdp->sd_jindex);
6239e6e0a12SSteven Whitehouse iput(sdp->sd_statfs_inode);
6249e6e0a12SSteven Whitehouse iput(sdp->sd_rindex);
6259e6e0a12SSteven Whitehouse iput(sdp->sd_quota_inode);
6269e6e0a12SSteven Whitehouse
6279e6e0a12SSteven Whitehouse gfs2_glock_put(sdp->sd_rename_gl);
62824972557SBenjamin Marzinski gfs2_glock_put(sdp->sd_freeze_gl);
6299e6e0a12SSteven Whitehouse
6309e6e0a12SSteven Whitehouse if (!sdp->sd_args.ar_spectator) {
631601ef0d5SBob Peterson if (gfs2_holder_initialized(&sdp->sd_journal_gh))
6329e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
633601ef0d5SBob Peterson if (gfs2_holder_initialized(&sdp->sd_jinode_gh))
6349e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
63570c11ba8SBob Peterson brelse(sdp->sd_sc_bh);
6369e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
6379e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
63897fd734bSAbhi Das free_local_statfs_inodes(sdp);
6399e6e0a12SSteven Whitehouse iput(sdp->sd_qc_inode);
6409e6e0a12SSteven Whitehouse }
6419e6e0a12SSteven Whitehouse
6429e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&sdp->sd_live_gh);
6439e6e0a12SSteven Whitehouse gfs2_clear_rgrpd(sdp);
6449e6e0a12SSteven Whitehouse gfs2_jindex_free(sdp);
6459e6e0a12SSteven Whitehouse /* Take apart glock structures and buffer lists */
6469e6e0a12SSteven Whitehouse gfs2_gl_hash_clear(sdp);
647a9dd945cSBob Peterson truncate_inode_pages_final(&sdp->sd_aspace);
648b2fb7dabSBob Peterson gfs2_delete_debugfs_file(sdp);
6499e6e0a12SSteven Whitehouse
6509e6e0a12SSteven Whitehouse gfs2_sys_fs_del(sdp);
651c2a04b02SJamie Iles free_sbd(sdp);
6529e6e0a12SSteven Whitehouse }
6539e6e0a12SSteven Whitehouse
6549e6e0a12SSteven Whitehouse /**
6559e6e0a12SSteven Whitehouse * gfs2_sync_fs - sync the filesystem
6569e6e0a12SSteven Whitehouse * @sb: the superblock
657c551f66cSLee Jones * @wait: true to wait for completion
6589e6e0a12SSteven Whitehouse *
6599e6e0a12SSteven Whitehouse * Flushes the log to disk.
6609e6e0a12SSteven Whitehouse */
6619e6e0a12SSteven Whitehouse
gfs2_sync_fs(struct super_block * sb,int wait)6629e6e0a12SSteven Whitehouse static int gfs2_sync_fs(struct super_block *sb, int wait)
6639e6e0a12SSteven Whitehouse {
6641027efaaSSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info;
665a1177825SJan Kara
666a1177825SJan Kara gfs2_quota_sync(sb, -1);
667942b0cddSBob Peterson if (wait)
668805c0907SBob Peterson gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_NORMAL |
669805c0907SBob Peterson GFS2_LFC_SYNC_FS);
670942b0cddSBob Peterson return sdp->sd_log_error;
6719e6e0a12SSteven Whitehouse }
6729e6e0a12SSteven Whitehouse
gfs2_freeze_locally(struct gfs2_sbd * sdp)673b77b4a48SAndreas Gruenbacher static int gfs2_freeze_locally(struct gfs2_sbd *sdp)
674b77b4a48SAndreas Gruenbacher {
675b77b4a48SAndreas Gruenbacher struct super_block *sb = sdp->sd_vfs;
676b77b4a48SAndreas Gruenbacher int error;
677b77b4a48SAndreas Gruenbacher
678880b9577SDarrick J. Wong error = freeze_super(sb, FREEZE_HOLDER_USERSPACE);
679b77b4a48SAndreas Gruenbacher if (error)
6805432af15SAndreas Gruenbacher return error;
681b77b4a48SAndreas Gruenbacher
682b77b4a48SAndreas Gruenbacher if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
683b77b4a48SAndreas Gruenbacher gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_FREEZE |
684b77b4a48SAndreas Gruenbacher GFS2_LFC_FREEZE_GO_SYNC);
685d6b412c5SAndreas Gruenbacher if (gfs2_withdrawing_or_withdrawn(sdp)) {
686880b9577SDarrick J. Wong error = thaw_super(sb, FREEZE_HOLDER_USERSPACE);
687880b9577SDarrick J. Wong if (error)
688880b9577SDarrick J. Wong return error;
6895432af15SAndreas Gruenbacher return -EIO;
690b77b4a48SAndreas Gruenbacher }
691b77b4a48SAndreas Gruenbacher }
692b77b4a48SAndreas Gruenbacher return 0;
693b77b4a48SAndreas Gruenbacher }
694b77b4a48SAndreas Gruenbacher
gfs2_do_thaw(struct gfs2_sbd * sdp)695b77b4a48SAndreas Gruenbacher static int gfs2_do_thaw(struct gfs2_sbd *sdp)
696b77b4a48SAndreas Gruenbacher {
697b77b4a48SAndreas Gruenbacher struct super_block *sb = sdp->sd_vfs;
698b77b4a48SAndreas Gruenbacher int error;
699b77b4a48SAndreas Gruenbacher
7006c7410f4SAndreas Gruenbacher error = gfs2_freeze_lock_shared(sdp);
701b77b4a48SAndreas Gruenbacher if (error)
702b77b4a48SAndreas Gruenbacher goto fail;
703880b9577SDarrick J. Wong error = thaw_super(sb, FREEZE_HOLDER_USERSPACE);
704b77b4a48SAndreas Gruenbacher if (!error)
705b77b4a48SAndreas Gruenbacher return 0;
706b77b4a48SAndreas Gruenbacher
707b77b4a48SAndreas Gruenbacher fail:
708b77b4a48SAndreas Gruenbacher fs_info(sdp, "GFS2: couldn't thaw filesystem: %d\n", error);
709b77b4a48SAndreas Gruenbacher gfs2_assert_withdraw(sdp, 0);
710b77b4a48SAndreas Gruenbacher return error;
711b77b4a48SAndreas Gruenbacher }
712b77b4a48SAndreas Gruenbacher
gfs2_freeze_func(struct work_struct * work)7132e60d768SBenjamin Marzinski void gfs2_freeze_func(struct work_struct *work)
7142e60d768SBenjamin Marzinski {
7152e60d768SBenjamin Marzinski struct gfs2_sbd *sdp = container_of(work, struct gfs2_sbd, sd_freeze_work);
7162e60d768SBenjamin Marzinski struct super_block *sb = sdp->sd_vfs;
717b77b4a48SAndreas Gruenbacher int error;
7182e60d768SBenjamin Marzinski
719b77b4a48SAndreas Gruenbacher mutex_lock(&sdp->sd_freeze_mutex);
720b77b4a48SAndreas Gruenbacher error = -EBUSY;
7215432af15SAndreas Gruenbacher if (test_bit(SDF_FROZEN, &sdp->sd_flags))
722b77b4a48SAndreas Gruenbacher goto freeze_failed;
723b77b4a48SAndreas Gruenbacher
724b77b4a48SAndreas Gruenbacher error = gfs2_freeze_locally(sdp);
725b77b4a48SAndreas Gruenbacher if (error)
726b77b4a48SAndreas Gruenbacher goto freeze_failed;
727b77b4a48SAndreas Gruenbacher
728b77b4a48SAndreas Gruenbacher gfs2_freeze_unlock(&sdp->sd_freeze_gh);
7295432af15SAndreas Gruenbacher set_bit(SDF_FROZEN, &sdp->sd_flags);
730b77b4a48SAndreas Gruenbacher
731b77b4a48SAndreas Gruenbacher error = gfs2_do_thaw(sdp);
732b77b4a48SAndreas Gruenbacher if (error)
733b77b4a48SAndreas Gruenbacher goto out;
734b77b4a48SAndreas Gruenbacher
7355432af15SAndreas Gruenbacher clear_bit(SDF_FROZEN, &sdp->sd_flags);
736b77b4a48SAndreas Gruenbacher goto out;
737b77b4a48SAndreas Gruenbacher
738b77b4a48SAndreas Gruenbacher freeze_failed:
739b77b4a48SAndreas Gruenbacher fs_info(sdp, "GFS2: couldn't freeze filesystem: %d\n", error);
740b77b4a48SAndreas Gruenbacher
741b77b4a48SAndreas Gruenbacher out:
742b77b4a48SAndreas Gruenbacher mutex_unlock(&sdp->sd_freeze_mutex);
7432e60d768SBenjamin Marzinski deactivate_super(sb);
7442e60d768SBenjamin Marzinski }
7452e60d768SBenjamin Marzinski
7469e6e0a12SSteven Whitehouse /**
747097cca52SAndreas Gruenbacher * gfs2_freeze_super - prevent further writes to the filesystem
7489e6e0a12SSteven Whitehouse * @sb: the VFS structure for the filesystem
7499e6e0a12SSteven Whitehouse *
7509e6e0a12SSteven Whitehouse */
7519e6e0a12SSteven Whitehouse
gfs2_freeze_super(struct super_block * sb,enum freeze_holder who)752880b9577SDarrick J. Wong static int gfs2_freeze_super(struct super_block *sb, enum freeze_holder who)
7539e6e0a12SSteven Whitehouse {
7549e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info;
755ff132c5fSBob Peterson int error;
7569e6e0a12SSteven Whitehouse
757b77b4a48SAndreas Gruenbacher if (!mutex_trylock(&sdp->sd_freeze_mutex))
758b77b4a48SAndreas Gruenbacher return -EBUSY;
759ff132c5fSBob Peterson error = -EBUSY;
7605432af15SAndreas Gruenbacher if (test_bit(SDF_FROZEN, &sdp->sd_flags))
7612e60d768SBenjamin Marzinski goto out;
7622e60d768SBenjamin Marzinski
76360528afaSBob Peterson for (;;) {
764b77b4a48SAndreas Gruenbacher error = gfs2_freeze_locally(sdp);
765b77b4a48SAndreas Gruenbacher if (error) {
766b77b4a48SAndreas Gruenbacher fs_info(sdp, "GFS2: couldn't freeze filesystem: %d\n",
767b77b4a48SAndreas Gruenbacher error);
7682e60d768SBenjamin Marzinski goto out;
7692e60d768SBenjamin Marzinski }
7709e6e0a12SSteven Whitehouse
77152b1cdcbSBob Peterson error = gfs2_lock_fs_check_clean(sdp);
7729e6e0a12SSteven Whitehouse if (!error)
773b77b4a48SAndreas Gruenbacher break; /* success */
774b77b4a48SAndreas Gruenbacher
775b77b4a48SAndreas Gruenbacher error = gfs2_do_thaw(sdp);
776b77b4a48SAndreas Gruenbacher if (error)
777b77b4a48SAndreas Gruenbacher goto out;
7789e6e0a12SSteven Whitehouse
77955317f5bSBob Peterson if (error == -EBUSY)
7809e6e0a12SSteven Whitehouse fs_err(sdp, "waiting for recovery before freeze\n");
78152b1cdcbSBob Peterson else if (error == -EIO) {
78252b1cdcbSBob Peterson fs_err(sdp, "Fatal IO error: cannot freeze gfs2 due "
78352b1cdcbSBob Peterson "to recovery error.\n");
78452b1cdcbSBob Peterson goto out;
78552b1cdcbSBob Peterson } else {
7869e6e0a12SSteven Whitehouse fs_err(sdp, "error freezing FS: %d\n", error);
78752b1cdcbSBob Peterson }
7889e6e0a12SSteven Whitehouse fs_err(sdp, "retrying...\n");
7899e6e0a12SSteven Whitehouse msleep(1000);
7909e6e0a12SSteven Whitehouse }
791b77b4a48SAndreas Gruenbacher
7922e60d768SBenjamin Marzinski out:
793b77b4a48SAndreas Gruenbacher if (!error) {
794b77b4a48SAndreas Gruenbacher set_bit(SDF_FREEZE_INITIATOR, &sdp->sd_flags);
7955432af15SAndreas Gruenbacher set_bit(SDF_FROZEN, &sdp->sd_flags);
796b77b4a48SAndreas Gruenbacher }
7972e60d768SBenjamin Marzinski mutex_unlock(&sdp->sd_freeze_mutex);
7982e60d768SBenjamin Marzinski return error;
7999e6e0a12SSteven Whitehouse }
8009e6e0a12SSteven Whitehouse
8019e6e0a12SSteven Whitehouse /**
802097cca52SAndreas Gruenbacher * gfs2_thaw_super - reallow writes to the filesystem
8039e6e0a12SSteven Whitehouse * @sb: the VFS structure for the filesystem
8049e6e0a12SSteven Whitehouse *
8059e6e0a12SSteven Whitehouse */
8069e6e0a12SSteven Whitehouse
gfs2_thaw_super(struct super_block * sb,enum freeze_holder who)807880b9577SDarrick J. Wong static int gfs2_thaw_super(struct super_block *sb, enum freeze_holder who)
8089e6e0a12SSteven Whitehouse {
809d564053fSSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info;
810b77b4a48SAndreas Gruenbacher int error;
811d564053fSSteven Whitehouse
812b77b4a48SAndreas Gruenbacher if (!mutex_trylock(&sdp->sd_freeze_mutex))
813b77b4a48SAndreas Gruenbacher return -EBUSY;
814b77b4a48SAndreas Gruenbacher error = -EINVAL;
815b77b4a48SAndreas Gruenbacher if (!test_bit(SDF_FREEZE_INITIATOR, &sdp->sd_flags))
816b77b4a48SAndreas Gruenbacher goto out;
8172e60d768SBenjamin Marzinski
818c77b52c0SBob Peterson gfs2_freeze_unlock(&sdp->sd_freeze_gh);
819b77b4a48SAndreas Gruenbacher
820b77b4a48SAndreas Gruenbacher error = gfs2_do_thaw(sdp);
821b77b4a48SAndreas Gruenbacher
822b77b4a48SAndreas Gruenbacher if (!error) {
823b77b4a48SAndreas Gruenbacher clear_bit(SDF_FREEZE_INITIATOR, &sdp->sd_flags);
8245432af15SAndreas Gruenbacher clear_bit(SDF_FROZEN, &sdp->sd_flags);
825b77b4a48SAndreas Gruenbacher }
826b77b4a48SAndreas Gruenbacher out:
8272e60d768SBenjamin Marzinski mutex_unlock(&sdp->sd_freeze_mutex);
828b77b4a48SAndreas Gruenbacher return error;
829b77b4a48SAndreas Gruenbacher }
830b77b4a48SAndreas Gruenbacher
gfs2_thaw_freeze_initiator(struct super_block * sb)831b77b4a48SAndreas Gruenbacher void gfs2_thaw_freeze_initiator(struct super_block *sb)
832b77b4a48SAndreas Gruenbacher {
833b77b4a48SAndreas Gruenbacher struct gfs2_sbd *sdp = sb->s_fs_info;
834b77b4a48SAndreas Gruenbacher
835b77b4a48SAndreas Gruenbacher mutex_lock(&sdp->sd_freeze_mutex);
836b77b4a48SAndreas Gruenbacher if (!test_bit(SDF_FREEZE_INITIATOR, &sdp->sd_flags))
837b77b4a48SAndreas Gruenbacher goto out;
838b77b4a48SAndreas Gruenbacher
839b77b4a48SAndreas Gruenbacher gfs2_freeze_unlock(&sdp->sd_freeze_gh);
840b77b4a48SAndreas Gruenbacher
841b77b4a48SAndreas Gruenbacher out:
842b77b4a48SAndreas Gruenbacher mutex_unlock(&sdp->sd_freeze_mutex);
8439e6e0a12SSteven Whitehouse }
8449e6e0a12SSteven Whitehouse
8459e6e0a12SSteven Whitehouse /**
846c551f66cSLee Jones * statfs_slow_fill - fill in the sg for a given RG
8479e6e0a12SSteven Whitehouse * @rgd: the RG
8489e6e0a12SSteven Whitehouse * @sc: the sc structure
8499e6e0a12SSteven Whitehouse *
8509e6e0a12SSteven Whitehouse * Returns: 0 on success, -ESTALE if the LVB is invalid
8519e6e0a12SSteven Whitehouse */
8529e6e0a12SSteven Whitehouse
statfs_slow_fill(struct gfs2_rgrpd * rgd,struct gfs2_statfs_change_host * sc)8539e6e0a12SSteven Whitehouse static int statfs_slow_fill(struct gfs2_rgrpd *rgd,
8549e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host *sc)
8559e6e0a12SSteven Whitehouse {
8569e6e0a12SSteven Whitehouse gfs2_rgrp_verify(rgd);
8579e6e0a12SSteven Whitehouse sc->sc_total += rgd->rd_data;
8589e6e0a12SSteven Whitehouse sc->sc_free += rgd->rd_free;
8599e6e0a12SSteven Whitehouse sc->sc_dinodes += rgd->rd_dinodes;
8609e6e0a12SSteven Whitehouse return 0;
8619e6e0a12SSteven Whitehouse }
8629e6e0a12SSteven Whitehouse
8639e6e0a12SSteven Whitehouse /**
8649e6e0a12SSteven Whitehouse * gfs2_statfs_slow - Stat a filesystem using asynchronous locking
8659e6e0a12SSteven Whitehouse * @sdp: the filesystem
8669e6e0a12SSteven Whitehouse * @sc: the sc info that will be returned
8679e6e0a12SSteven Whitehouse *
8689e6e0a12SSteven Whitehouse * Any error (other than a signal) will cause this routine to fall back
8699e6e0a12SSteven Whitehouse * to the synchronous version.
8709e6e0a12SSteven Whitehouse *
8719e6e0a12SSteven Whitehouse * FIXME: This really shouldn't busy wait like this.
8729e6e0a12SSteven Whitehouse *
8739e6e0a12SSteven Whitehouse * Returns: errno
8749e6e0a12SSteven Whitehouse */
8759e6e0a12SSteven Whitehouse
gfs2_statfs_slow(struct gfs2_sbd * sdp,struct gfs2_statfs_change_host * sc)8769e6e0a12SSteven Whitehouse static int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
8779e6e0a12SSteven Whitehouse {
8789e6e0a12SSteven Whitehouse struct gfs2_rgrpd *rgd_next;
8799e6e0a12SSteven Whitehouse struct gfs2_holder *gha, *gh;
8809e6e0a12SSteven Whitehouse unsigned int slots = 64;
8819e6e0a12SSteven Whitehouse unsigned int x;
8829e6e0a12SSteven Whitehouse int done;
8839e6e0a12SSteven Whitehouse int error = 0, err;
8849e6e0a12SSteven Whitehouse
8859e6e0a12SSteven Whitehouse memset(sc, 0, sizeof(struct gfs2_statfs_change_host));
8866da2ec56SKees Cook gha = kmalloc_array(slots, sizeof(struct gfs2_holder), GFP_KERNEL);
8879e6e0a12SSteven Whitehouse if (!gha)
8889e6e0a12SSteven Whitehouse return -ENOMEM;
8896df9f9a2SAndreas Gruenbacher for (x = 0; x < slots; x++)
8906df9f9a2SAndreas Gruenbacher gfs2_holder_mark_uninitialized(gha + x);
8919e6e0a12SSteven Whitehouse
8929e6e0a12SSteven Whitehouse rgd_next = gfs2_rgrpd_get_first(sdp);
8939e6e0a12SSteven Whitehouse
8949e6e0a12SSteven Whitehouse for (;;) {
8959e6e0a12SSteven Whitehouse done = 1;
8969e6e0a12SSteven Whitehouse
8979e6e0a12SSteven Whitehouse for (x = 0; x < slots; x++) {
8989e6e0a12SSteven Whitehouse gh = gha + x;
8999e6e0a12SSteven Whitehouse
9006df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(gh) && gfs2_glock_poll(gh)) {
9019e6e0a12SSteven Whitehouse err = gfs2_glock_wait(gh);
9029e6e0a12SSteven Whitehouse if (err) {
9039e6e0a12SSteven Whitehouse gfs2_holder_uninit(gh);
9049e6e0a12SSteven Whitehouse error = err;
9059e6e0a12SSteven Whitehouse } else {
9066f6597baSAndreas Gruenbacher if (!error) {
9076f6597baSAndreas Gruenbacher struct gfs2_rgrpd *rgd =
9086f6597baSAndreas Gruenbacher gfs2_glock2rgrp(gh->gh_gl);
9096f6597baSAndreas Gruenbacher
9106f6597baSAndreas Gruenbacher error = statfs_slow_fill(rgd, sc);
9116f6597baSAndreas Gruenbacher }
9129e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(gh);
9139e6e0a12SSteven Whitehouse }
9149e6e0a12SSteven Whitehouse }
9159e6e0a12SSteven Whitehouse
9166df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(gh))
9179e6e0a12SSteven Whitehouse done = 0;
9189e6e0a12SSteven Whitehouse else if (rgd_next && !error) {
9199e6e0a12SSteven Whitehouse error = gfs2_glock_nq_init(rgd_next->rd_gl,
9209e6e0a12SSteven Whitehouse LM_ST_SHARED,
9219e6e0a12SSteven Whitehouse GL_ASYNC,
9229e6e0a12SSteven Whitehouse gh);
9239e6e0a12SSteven Whitehouse rgd_next = gfs2_rgrpd_get_next(rgd_next);
9249e6e0a12SSteven Whitehouse done = 0;
9259e6e0a12SSteven Whitehouse }
9269e6e0a12SSteven Whitehouse
9279e6e0a12SSteven Whitehouse if (signal_pending(current))
9289e6e0a12SSteven Whitehouse error = -ERESTARTSYS;
9299e6e0a12SSteven Whitehouse }
9309e6e0a12SSteven Whitehouse
9319e6e0a12SSteven Whitehouse if (done)
9329e6e0a12SSteven Whitehouse break;
9339e6e0a12SSteven Whitehouse
9349e6e0a12SSteven Whitehouse yield();
9359e6e0a12SSteven Whitehouse }
9369e6e0a12SSteven Whitehouse
9379e6e0a12SSteven Whitehouse kfree(gha);
9389e6e0a12SSteven Whitehouse return error;
9399e6e0a12SSteven Whitehouse }
9409e6e0a12SSteven Whitehouse
9419e6e0a12SSteven Whitehouse /**
9429e6e0a12SSteven Whitehouse * gfs2_statfs_i - Do a statfs
9439e6e0a12SSteven Whitehouse * @sdp: the filesystem
944c551f66cSLee Jones * @sc: the sc structure
9459e6e0a12SSteven Whitehouse *
9469e6e0a12SSteven Whitehouse * Returns: errno
9479e6e0a12SSteven Whitehouse */
9489e6e0a12SSteven Whitehouse
gfs2_statfs_i(struct gfs2_sbd * sdp,struct gfs2_statfs_change_host * sc)9499e6e0a12SSteven Whitehouse static int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc)
9509e6e0a12SSteven Whitehouse {
9519e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
9529e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
9539e6e0a12SSteven Whitehouse
9549e6e0a12SSteven Whitehouse spin_lock(&sdp->sd_statfs_spin);
9559e6e0a12SSteven Whitehouse
9569e6e0a12SSteven Whitehouse *sc = *m_sc;
9579e6e0a12SSteven Whitehouse sc->sc_total += l_sc->sc_total;
9589e6e0a12SSteven Whitehouse sc->sc_free += l_sc->sc_free;
9599e6e0a12SSteven Whitehouse sc->sc_dinodes += l_sc->sc_dinodes;
9609e6e0a12SSteven Whitehouse
9619e6e0a12SSteven Whitehouse spin_unlock(&sdp->sd_statfs_spin);
9629e6e0a12SSteven Whitehouse
9639e6e0a12SSteven Whitehouse if (sc->sc_free < 0)
9649e6e0a12SSteven Whitehouse sc->sc_free = 0;
9659e6e0a12SSteven Whitehouse if (sc->sc_free > sc->sc_total)
9669e6e0a12SSteven Whitehouse sc->sc_free = sc->sc_total;
9679e6e0a12SSteven Whitehouse if (sc->sc_dinodes < 0)
9689e6e0a12SSteven Whitehouse sc->sc_dinodes = 0;
9699e6e0a12SSteven Whitehouse
9709e6e0a12SSteven Whitehouse return 0;
9719e6e0a12SSteven Whitehouse }
9729e6e0a12SSteven Whitehouse
9739e6e0a12SSteven Whitehouse /**
9749e6e0a12SSteven Whitehouse * gfs2_statfs - Gather and return stats about the filesystem
975c551f66cSLee Jones * @dentry: The name of the link
976c551f66cSLee Jones * @buf: The buffer
9779e6e0a12SSteven Whitehouse *
9789e6e0a12SSteven Whitehouse * Returns: 0 on success or error code
9799e6e0a12SSteven Whitehouse */
9809e6e0a12SSteven Whitehouse
gfs2_statfs(struct dentry * dentry,struct kstatfs * buf)9819e6e0a12SSteven Whitehouse static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
9829e6e0a12SSteven Whitehouse {
983fc64005cSAl Viro struct super_block *sb = dentry->d_sb;
9849e6e0a12SSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info;
9859e6e0a12SSteven Whitehouse struct gfs2_statfs_change_host sc;
9869e6e0a12SSteven Whitehouse int error;
9879e6e0a12SSteven Whitehouse
9888339ee54SSteven Whitehouse error = gfs2_rindex_update(sdp);
9898339ee54SSteven Whitehouse if (error)
9908339ee54SSteven Whitehouse return error;
9918339ee54SSteven Whitehouse
9929e6e0a12SSteven Whitehouse if (gfs2_tune_get(sdp, gt_statfs_slow))
9939e6e0a12SSteven Whitehouse error = gfs2_statfs_slow(sdp, &sc);
9949e6e0a12SSteven Whitehouse else
9959e6e0a12SSteven Whitehouse error = gfs2_statfs_i(sdp, &sc);
9969e6e0a12SSteven Whitehouse
9979e6e0a12SSteven Whitehouse if (error)
9989e6e0a12SSteven Whitehouse return error;
9999e6e0a12SSteven Whitehouse
10009e6e0a12SSteven Whitehouse buf->f_type = GFS2_MAGIC;
10019e6e0a12SSteven Whitehouse buf->f_bsize = sdp->sd_sb.sb_bsize;
10029e6e0a12SSteven Whitehouse buf->f_blocks = sc.sc_total;
10039e6e0a12SSteven Whitehouse buf->f_bfree = sc.sc_free;
10049e6e0a12SSteven Whitehouse buf->f_bavail = sc.sc_free;
10059e6e0a12SSteven Whitehouse buf->f_files = sc.sc_dinodes + sc.sc_free;
10069e6e0a12SSteven Whitehouse buf->f_ffree = sc.sc_free;
10079e6e0a12SSteven Whitehouse buf->f_namelen = GFS2_FNAMESIZE;
10089e6e0a12SSteven Whitehouse
10099e6e0a12SSteven Whitehouse return 0;
10109e6e0a12SSteven Whitehouse }
10119e6e0a12SSteven Whitehouse
10129e6e0a12SSteven Whitehouse /**
10139e6e0a12SSteven Whitehouse * gfs2_drop_inode - Drop an inode (test for remote unlink)
10149e6e0a12SSteven Whitehouse * @inode: The inode to drop
10159e6e0a12SSteven Whitehouse *
101661b91cfdSAndreas Gruenbacher * If we've received a callback on an iopen lock then it's because a
10179e6e0a12SSteven Whitehouse * remote node tried to deallocate the inode but failed due to this node
10189e6e0a12SSteven Whitehouse * still having the inode open. Here we mark the link count zero
10199e6e0a12SSteven Whitehouse * since we know that it must have reached zero if the GLF_DEMOTE flag
10209e6e0a12SSteven Whitehouse * is set on the iopen glock. If we didn't do a disk read since the
10219e6e0a12SSteven Whitehouse * remote node removed the final link then we might otherwise miss
10229e6e0a12SSteven Whitehouse * this event. This check ensures that this node will deallocate the
10239e6e0a12SSteven Whitehouse * inode's blocks, or alternatively pass the baton on to another
10249e6e0a12SSteven Whitehouse * node for later deallocation.
10259e6e0a12SSteven Whitehouse */
10269e6e0a12SSteven Whitehouse
gfs2_drop_inode(struct inode * inode)102745321ac5SAl Viro static int gfs2_drop_inode(struct inode *inode)
10289e6e0a12SSteven Whitehouse {
10299e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode);
1030b88beb9aSAndreas Gruenbacher struct gfs2_sbd *sdp = GFS2_SB(inode);
10319e6e0a12SSteven Whitehouse
103238552ff6SAndreas Gruenbacher if (inode->i_nlink &&
10336df9f9a2SAndreas Gruenbacher gfs2_holder_initialized(&ip->i_iopen_gh)) {
10349e6e0a12SSteven Whitehouse struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
10356df9f9a2SAndreas Gruenbacher if (test_bit(GLF_DEMOTE, &gl->gl_flags))
10369e6e0a12SSteven Whitehouse clear_nlink(inode);
10379e6e0a12SSteven Whitehouse }
10386a1c8f6dSAndreas Gruenbacher
10396a1c8f6dSAndreas Gruenbacher /*
10406a1c8f6dSAndreas Gruenbacher * When under memory pressure when an inode's link count has dropped to
10416a1c8f6dSAndreas Gruenbacher * zero, defer deleting the inode to the delete workqueue. This avoids
10426a1c8f6dSAndreas Gruenbacher * calling into DLM under memory pressure, which can deadlock.
10436a1c8f6dSAndreas Gruenbacher */
10446a1c8f6dSAndreas Gruenbacher if (!inode->i_nlink &&
10456a1c8f6dSAndreas Gruenbacher unlikely(current->flags & PF_MEMALLOC) &&
10466a1c8f6dSAndreas Gruenbacher gfs2_holder_initialized(&ip->i_iopen_gh)) {
10476a1c8f6dSAndreas Gruenbacher struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
10486a1c8f6dSAndreas Gruenbacher
10496a1c8f6dSAndreas Gruenbacher gfs2_glock_hold(gl);
1050f0e56edcSAndreas Gruenbacher if (!gfs2_queue_try_to_evict(gl))
10516a1c8f6dSAndreas Gruenbacher gfs2_glock_queue_put(gl);
1052ba3ca2bcSBob Peterson return 0;
10536a1c8f6dSAndreas Gruenbacher }
10546a1c8f6dSAndreas Gruenbacher
1055b88beb9aSAndreas Gruenbacher /*
1056b88beb9aSAndreas Gruenbacher * No longer cache inodes when trying to evict them all.
1057b88beb9aSAndreas Gruenbacher */
1058b88beb9aSAndreas Gruenbacher if (test_bit(SDF_EVICTING, &sdp->sd_flags))
1059b88beb9aSAndreas Gruenbacher return 1;
1060b88beb9aSAndreas Gruenbacher
106145321ac5SAl Viro return generic_drop_inode(inode);
10629e6e0a12SSteven Whitehouse }
10639e6e0a12SSteven Whitehouse
is_ancestor(const struct dentry * d1,const struct dentry * d2)10649e6e0a12SSteven Whitehouse static int is_ancestor(const struct dentry *d1, const struct dentry *d2)
10659e6e0a12SSteven Whitehouse {
10669e6e0a12SSteven Whitehouse do {
10679e6e0a12SSteven Whitehouse if (d1 == d2)
10689e6e0a12SSteven Whitehouse return 1;
10699e6e0a12SSteven Whitehouse d1 = d1->d_parent;
10709e6e0a12SSteven Whitehouse } while (!IS_ROOT(d1));
10719e6e0a12SSteven Whitehouse return 0;
10729e6e0a12SSteven Whitehouse }
10739e6e0a12SSteven Whitehouse
10749e6e0a12SSteven Whitehouse /**
10759e6e0a12SSteven Whitehouse * gfs2_show_options - Show mount options for /proc/mounts
10769e6e0a12SSteven Whitehouse * @s: seq_file structure
107734c80b1dSAl Viro * @root: root of this (sub)tree
10789e6e0a12SSteven Whitehouse *
10799e6e0a12SSteven Whitehouse * Returns: 0 on success or error code
10809e6e0a12SSteven Whitehouse */
10819e6e0a12SSteven Whitehouse
gfs2_show_options(struct seq_file * s,struct dentry * root)108234c80b1dSAl Viro static int gfs2_show_options(struct seq_file *s, struct dentry *root)
10839e6e0a12SSteven Whitehouse {
108434c80b1dSAl Viro struct gfs2_sbd *sdp = root->d_sb->s_fs_info;
10859e6e0a12SSteven Whitehouse struct gfs2_args *args = &sdp->sd_args;
10866fa0a72cSTuo Li unsigned int logd_secs, statfs_slow, statfs_quantum, quota_quantum;
10876fa0a72cSTuo Li
10886fa0a72cSTuo Li spin_lock(&sdp->sd_tune.gt_spin);
10896fa0a72cSTuo Li logd_secs = sdp->sd_tune.gt_logd_secs;
10906fa0a72cSTuo Li quota_quantum = sdp->sd_tune.gt_quota_quantum;
10916fa0a72cSTuo Li statfs_quantum = sdp->sd_tune.gt_statfs_quantum;
10926fa0a72cSTuo Li statfs_slow = sdp->sd_tune.gt_statfs_slow;
10936fa0a72cSTuo Li spin_unlock(&sdp->sd_tune.gt_spin);
10949e6e0a12SSteven Whitehouse
109534c80b1dSAl Viro if (is_ancestor(root, sdp->sd_master_dir))
1096eaebdedcSFabian Frederick seq_puts(s, ",meta");
10979e6e0a12SSteven Whitehouse if (args->ar_lockproto[0])
1098a068acf2SKees Cook seq_show_option(s, "lockproto", args->ar_lockproto);
10999e6e0a12SSteven Whitehouse if (args->ar_locktable[0])
1100a068acf2SKees Cook seq_show_option(s, "locktable", args->ar_locktable);
11019e6e0a12SSteven Whitehouse if (args->ar_hostdata[0])
1102a068acf2SKees Cook seq_show_option(s, "hostdata", args->ar_hostdata);
11039e6e0a12SSteven Whitehouse if (args->ar_spectator)
1104eaebdedcSFabian Frederick seq_puts(s, ",spectator");
11059e6e0a12SSteven Whitehouse if (args->ar_localflocks)
1106eaebdedcSFabian Frederick seq_puts(s, ",localflocks");
11079e6e0a12SSteven Whitehouse if (args->ar_debug)
1108eaebdedcSFabian Frederick seq_puts(s, ",debug");
11099e6e0a12SSteven Whitehouse if (args->ar_posix_acl)
1110eaebdedcSFabian Frederick seq_puts(s, ",acl");
11119e6e0a12SSteven Whitehouse if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
11129e6e0a12SSteven Whitehouse char *state;
11139e6e0a12SSteven Whitehouse switch (args->ar_quota) {
11149e6e0a12SSteven Whitehouse case GFS2_QUOTA_OFF:
11159e6e0a12SSteven Whitehouse state = "off";
11169e6e0a12SSteven Whitehouse break;
11179e6e0a12SSteven Whitehouse case GFS2_QUOTA_ACCOUNT:
11189e6e0a12SSteven Whitehouse state = "account";
11199e6e0a12SSteven Whitehouse break;
11209e6e0a12SSteven Whitehouse case GFS2_QUOTA_ON:
11219e6e0a12SSteven Whitehouse state = "on";
11229e6e0a12SSteven Whitehouse break;
1123eef46ab7SBob Peterson case GFS2_QUOTA_QUIET:
1124eef46ab7SBob Peterson state = "quiet";
1125eef46ab7SBob Peterson break;
11269e6e0a12SSteven Whitehouse default:
11279e6e0a12SSteven Whitehouse state = "unknown";
11289e6e0a12SSteven Whitehouse break;
11299e6e0a12SSteven Whitehouse }
11309e6e0a12SSteven Whitehouse seq_printf(s, ",quota=%s", state);
11319e6e0a12SSteven Whitehouse }
11329e6e0a12SSteven Whitehouse if (args->ar_suiddir)
1133eaebdedcSFabian Frederick seq_puts(s, ",suiddir");
11349e6e0a12SSteven Whitehouse if (args->ar_data != GFS2_DATA_DEFAULT) {
11359e6e0a12SSteven Whitehouse char *state;
11369e6e0a12SSteven Whitehouse switch (args->ar_data) {
11379e6e0a12SSteven Whitehouse case GFS2_DATA_WRITEBACK:
11389e6e0a12SSteven Whitehouse state = "writeback";
11399e6e0a12SSteven Whitehouse break;
11409e6e0a12SSteven Whitehouse case GFS2_DATA_ORDERED:
11419e6e0a12SSteven Whitehouse state = "ordered";
11429e6e0a12SSteven Whitehouse break;
11439e6e0a12SSteven Whitehouse default:
11449e6e0a12SSteven Whitehouse state = "unknown";
11459e6e0a12SSteven Whitehouse break;
11469e6e0a12SSteven Whitehouse }
11479e6e0a12SSteven Whitehouse seq_printf(s, ",data=%s", state);
11489e6e0a12SSteven Whitehouse }
11499e6e0a12SSteven Whitehouse if (args->ar_discard)
1150eaebdedcSFabian Frederick seq_puts(s, ",discard");
11516fa0a72cSTuo Li if (logd_secs != 30)
11526fa0a72cSTuo Li seq_printf(s, ",commit=%d", logd_secs);
11536fa0a72cSTuo Li if (statfs_quantum != 30)
11546fa0a72cSTuo Li seq_printf(s, ",statfs_quantum=%d", statfs_quantum);
11556fa0a72cSTuo Li else if (statfs_slow)
11562b9731e8SSteven Whitehouse seq_puts(s, ",statfs_quantum=0");
11576fa0a72cSTuo Li if (quota_quantum != 60)
11586fa0a72cSTuo Li seq_printf(s, ",quota_quantum=%d", quota_quantum);
11593d3c10f2SBenjamin Marzinski if (args->ar_statfs_percent)
11603d3c10f2SBenjamin Marzinski seq_printf(s, ",statfs_percent=%d", args->ar_statfs_percent);
1161d34843d0SBob Peterson if (args->ar_errors != GFS2_ERRORS_DEFAULT) {
1162d34843d0SBob Peterson const char *state;
1163d34843d0SBob Peterson
1164d34843d0SBob Peterson switch (args->ar_errors) {
1165d34843d0SBob Peterson case GFS2_ERRORS_WITHDRAW:
1166d34843d0SBob Peterson state = "withdraw";
1167d34843d0SBob Peterson break;
1168d34843d0SBob Peterson case GFS2_ERRORS_PANIC:
1169d34843d0SBob Peterson state = "panic";
1170d34843d0SBob Peterson break;
1171d34843d0SBob Peterson default:
1172d34843d0SBob Peterson state = "unknown";
1173d34843d0SBob Peterson break;
1174d34843d0SBob Peterson }
1175d34843d0SBob Peterson seq_printf(s, ",errors=%s", state);
1176d34843d0SBob Peterson }
1177cdcfde62SSteven Whitehouse if (test_bit(SDF_NOBARRIERS, &sdp->sd_flags))
1178eaebdedcSFabian Frederick seq_puts(s, ",nobarrier");
1179913a71d2SSteven Whitehouse if (test_bit(SDF_DEMOTE, &sdp->sd_flags))
1180eaebdedcSFabian Frederick seq_puts(s, ",demote_interface_used");
118190306c41SBenjamin Marzinski if (args->ar_rgrplvb)
1182eaebdedcSFabian Frederick seq_puts(s, ",rgrplvb");
1183471f3db2SBenjamin Marzinski if (args->ar_loccookie)
1184471f3db2SBenjamin Marzinski seq_puts(s, ",loccookie");
11859e6e0a12SSteven Whitehouse return 0;
11869e6e0a12SSteven Whitehouse }
11879e6e0a12SSteven Whitehouse
gfs2_final_release_pages(struct gfs2_inode * ip)1188f42ab085SSteven Whitehouse static void gfs2_final_release_pages(struct gfs2_inode *ip)
1189f42ab085SSteven Whitehouse {
1190f42ab085SSteven Whitehouse struct inode *inode = &ip->i_inode;
1191f42ab085SSteven Whitehouse struct gfs2_glock *gl = ip->i_gl;
1192f42ab085SSteven Whitehouse
119338552ff6SAndreas Gruenbacher if (unlikely(!gl)) {
119438552ff6SAndreas Gruenbacher /* This can only happen during incomplete inode creation. */
119538552ff6SAndreas Gruenbacher BUG_ON(!test_bit(GIF_ALLOC_FAILED, &ip->i_flags));
119638552ff6SAndreas Gruenbacher return;
119738552ff6SAndreas Gruenbacher }
119838552ff6SAndreas Gruenbacher
119938552ff6SAndreas Gruenbacher truncate_inode_pages(gfs2_glock2aspace(gl), 0);
1200f42ab085SSteven Whitehouse truncate_inode_pages(&inode->i_data, 0);
1201f42ab085SSteven Whitehouse
1202638803d4SBob Peterson if (atomic_read(&gl->gl_revokes) == 0) {
1203f42ab085SSteven Whitehouse clear_bit(GLF_LFLUSH, &gl->gl_flags);
1204f42ab085SSteven Whitehouse clear_bit(GLF_DIRTY, &gl->gl_flags);
1205f42ab085SSteven Whitehouse }
1206f42ab085SSteven Whitehouse }
1207f42ab085SSteven Whitehouse
gfs2_dinode_dealloc(struct gfs2_inode * ip)1208f42ab085SSteven Whitehouse static int gfs2_dinode_dealloc(struct gfs2_inode *ip)
1209f42ab085SSteven Whitehouse {
1210f42ab085SSteven Whitehouse struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
1211f42ab085SSteven Whitehouse struct gfs2_rgrpd *rgd;
1212564e12b1SBob Peterson struct gfs2_holder gh;
1213f42ab085SSteven Whitehouse int error;
1214f42ab085SSteven Whitehouse
1215f42ab085SSteven Whitehouse if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
121694fb763bSSteven Whitehouse gfs2_consist_inode(ip);
1217f42ab085SSteven Whitehouse return -EIO;
1218f42ab085SSteven Whitehouse }
1219f42ab085SSteven Whitehouse
12209b620429SBob Peterson gfs2_rindex_update(sdp);
1221f42ab085SSteven Whitehouse
1222f4108a60SEric W. Biederman error = gfs2_quota_hold(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
1223f42ab085SSteven Whitehouse if (error)
12245407e242SBob Peterson return error;
1225f42ab085SSteven Whitehouse
122666fc061bSSteven Whitehouse rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr, 1);
1227f42ab085SSteven Whitehouse if (!rgd) {
1228f42ab085SSteven Whitehouse gfs2_consist_inode(ip);
1229f42ab085SSteven Whitehouse error = -EIO;
12308339ee54SSteven Whitehouse goto out_qs;
1231f42ab085SSteven Whitehouse }
1232f42ab085SSteven Whitehouse
12334fc7ec31SBob Peterson error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE,
12344fc7ec31SBob Peterson LM_FLAG_NODE_SCOPE, &gh);
1235f42ab085SSteven Whitehouse if (error)
12368339ee54SSteven Whitehouse goto out_qs;
1237f42ab085SSteven Whitehouse
12384667a0ecSSteven Whitehouse error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA,
12394667a0ecSSteven Whitehouse sdp->sd_jdesc->jd_blocks);
1240f42ab085SSteven Whitehouse if (error)
1241f42ab085SSteven Whitehouse goto out_rg_gunlock;
1242f42ab085SSteven Whitehouse
1243f42ab085SSteven Whitehouse gfs2_free_di(rgd, ip);
1244f42ab085SSteven Whitehouse
1245f42ab085SSteven Whitehouse gfs2_final_release_pages(ip);
1246f42ab085SSteven Whitehouse
1247f42ab085SSteven Whitehouse gfs2_trans_end(sdp);
1248f42ab085SSteven Whitehouse
1249f42ab085SSteven Whitehouse out_rg_gunlock:
1250564e12b1SBob Peterson gfs2_glock_dq_uninit(&gh);
1251f42ab085SSteven Whitehouse out_qs:
1252f42ab085SSteven Whitehouse gfs2_quota_unhold(ip);
1253f42ab085SSteven Whitehouse return error;
1254f42ab085SSteven Whitehouse }
1255f42ab085SSteven Whitehouse
1256380f7c65SSteven Whitehouse /**
125771c1b213SAndreas Gruenbacher * gfs2_glock_put_eventually
125871c1b213SAndreas Gruenbacher * @gl: The glock to put
125971c1b213SAndreas Gruenbacher *
126071c1b213SAndreas Gruenbacher * When under memory pressure, trigger a deferred glock put to make sure we
126171c1b213SAndreas Gruenbacher * won't call into DLM and deadlock. Otherwise, put the glock directly.
126271c1b213SAndreas Gruenbacher */
126371c1b213SAndreas Gruenbacher
gfs2_glock_put_eventually(struct gfs2_glock * gl)126471c1b213SAndreas Gruenbacher static void gfs2_glock_put_eventually(struct gfs2_glock *gl)
126571c1b213SAndreas Gruenbacher {
126671c1b213SAndreas Gruenbacher if (current->flags & PF_MEMALLOC)
126771c1b213SAndreas Gruenbacher gfs2_glock_queue_put(gl);
126871c1b213SAndreas Gruenbacher else
126971c1b213SAndreas Gruenbacher gfs2_glock_put(gl);
127071c1b213SAndreas Gruenbacher }
127171c1b213SAndreas Gruenbacher
gfs2_upgrade_iopen_glock(struct inode * inode)12729e73330fSAndreas Gruenbacher static bool gfs2_upgrade_iopen_glock(struct inode *inode)
12739e73330fSAndreas Gruenbacher {
12749e73330fSAndreas Gruenbacher struct gfs2_inode *ip = GFS2_I(inode);
12759e73330fSAndreas Gruenbacher struct gfs2_sbd *sdp = GFS2_SB(inode);
12769e73330fSAndreas Gruenbacher struct gfs2_holder *gh = &ip->i_iopen_gh;
12779e73330fSAndreas Gruenbacher long timeout = 5 * HZ;
12789e73330fSAndreas Gruenbacher int error;
12799e73330fSAndreas Gruenbacher
12809e73330fSAndreas Gruenbacher gh->gh_flags |= GL_NOCACHE;
12819e73330fSAndreas Gruenbacher gfs2_glock_dq_wait(gh);
12829e73330fSAndreas Gruenbacher
12839e73330fSAndreas Gruenbacher /*
12842d143955SAndreas Gruenbacher * If there are no other lock holders, we will immediately get
12852d143955SAndreas Gruenbacher * exclusive access to the iopen glock here.
12862d143955SAndreas Gruenbacher *
12879e73330fSAndreas Gruenbacher * Otherwise, the other nodes holding the lock will be notified about
12882d143955SAndreas Gruenbacher * our locking request. If they do not have the inode open, they are
12892d143955SAndreas Gruenbacher * expected to evict the cached inode and release the lock, allowing us
12902d143955SAndreas Gruenbacher * to proceed.
12912d143955SAndreas Gruenbacher *
12922d143955SAndreas Gruenbacher * Otherwise, if they cannot evict the inode, they are expected to poke
12932d143955SAndreas Gruenbacher * the inode glock (note: not the iopen glock). We will notice that
12942d143955SAndreas Gruenbacher * and stop waiting for the iopen glock immediately. The other node(s)
12952d143955SAndreas Gruenbacher * are then expected to take care of deleting the inode when they no
12962d143955SAndreas Gruenbacher * longer use it.
12972d143955SAndreas Gruenbacher *
12982d143955SAndreas Gruenbacher * As a last resort, if another node keeps holding the iopen glock
12992d143955SAndreas Gruenbacher * without showing any activity on the inode glock, we will eventually
13002d143955SAndreas Gruenbacher * time out and fail the iopen glock upgrade.
13019e73330fSAndreas Gruenbacher *
13029e73330fSAndreas Gruenbacher * Note that we're passing the LM_FLAG_TRY_1CB flag to the first
13039e73330fSAndreas Gruenbacher * locking request as an optimization to notify lock holders as soon as
13049e73330fSAndreas Gruenbacher * possible. Without that flag, they'd be notified implicitly by the
13059e73330fSAndreas Gruenbacher * second locking request.
13069e73330fSAndreas Gruenbacher */
13079e73330fSAndreas Gruenbacher
13089e73330fSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, gh);
13099e73330fSAndreas Gruenbacher error = gfs2_glock_nq(gh);
13109e73330fSAndreas Gruenbacher if (error != GLR_TRYFAILED)
13119e73330fSAndreas Gruenbacher return !error;
13129e73330fSAndreas Gruenbacher
13139e73330fSAndreas Gruenbacher gfs2_holder_reinit(LM_ST_EXCLUSIVE, GL_ASYNC | GL_NOCACHE, gh);
13149e73330fSAndreas Gruenbacher error = gfs2_glock_nq(gh);
13159e73330fSAndreas Gruenbacher if (error)
13169e73330fSAndreas Gruenbacher return false;
13179e73330fSAndreas Gruenbacher
13189e73330fSAndreas Gruenbacher timeout = wait_event_interruptible_timeout(sdp->sd_async_glock_wait,
13199e8990deSAndreas Gruenbacher !test_bit(HIF_WAIT, &gh->gh_iflags) ||
13209e8990deSAndreas Gruenbacher test_bit(GLF_DEMOTE, &ip->i_gl->gl_flags),
13219e73330fSAndreas Gruenbacher timeout);
13229e73330fSAndreas Gruenbacher if (!test_bit(HIF_HOLDER, &gh->gh_iflags)) {
13239e73330fSAndreas Gruenbacher gfs2_glock_dq(gh);
13249e73330fSAndreas Gruenbacher return false;
13259e73330fSAndreas Gruenbacher }
132653d69132SAndreas Gruenbacher return gfs2_glock_holder_ready(gh) == 0;
13279e73330fSAndreas Gruenbacher }
13289e73330fSAndreas Gruenbacher
132971c1b213SAndreas Gruenbacher /**
133053dbc27eSBob Peterson * evict_should_delete - determine whether the inode is eligible for deletion
133153dbc27eSBob Peterson * @inode: The inode to evict
1332c551f66cSLee Jones * @gh: The glock holder structure
133353dbc27eSBob Peterson *
133453dbc27eSBob Peterson * This function determines whether the evicted inode is eligible to be deleted
133553dbc27eSBob Peterson * and locks the inode glock.
133653dbc27eSBob Peterson *
133753dbc27eSBob Peterson * Returns: the fate of the dinode
133853dbc27eSBob Peterson */
evict_should_delete(struct inode * inode,struct gfs2_holder * gh)133953dbc27eSBob Peterson static enum dinode_demise evict_should_delete(struct inode *inode,
134053dbc27eSBob Peterson struct gfs2_holder *gh)
134153dbc27eSBob Peterson {
134253dbc27eSBob Peterson struct gfs2_inode *ip = GFS2_I(inode);
134353dbc27eSBob Peterson struct super_block *sb = inode->i_sb;
134453dbc27eSBob Peterson struct gfs2_sbd *sdp = sb->s_fs_info;
134553dbc27eSBob Peterson int ret;
134653dbc27eSBob Peterson
134738552ff6SAndreas Gruenbacher if (unlikely(test_bit(GIF_ALLOC_FAILED, &ip->i_flags)))
134853dbc27eSBob Peterson goto should_delete;
134953dbc27eSBob Peterson
135053dbc27eSBob Peterson if (test_bit(GIF_DEFERRED_DELETE, &ip->i_flags))
135153dbc27eSBob Peterson return SHOULD_DEFER_EVICTION;
135253dbc27eSBob Peterson
135353dbc27eSBob Peterson /* Deletes should never happen under memory pressure anymore. */
135453dbc27eSBob Peterson if (WARN_ON_ONCE(current->flags & PF_MEMALLOC))
135553dbc27eSBob Peterson return SHOULD_DEFER_EVICTION;
135653dbc27eSBob Peterson
135753dbc27eSBob Peterson /* Must not read inode block until block type has been verified */
135853dbc27eSBob Peterson ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, GL_SKIP, gh);
135953dbc27eSBob Peterson if (unlikely(ret)) {
136053dbc27eSBob Peterson glock_clear_object(ip->i_iopen_gh.gh_gl, ip);
136153dbc27eSBob Peterson ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
136253dbc27eSBob Peterson gfs2_glock_dq_uninit(&ip->i_iopen_gh);
136353dbc27eSBob Peterson return SHOULD_DEFER_EVICTION;
136453dbc27eSBob Peterson }
136553dbc27eSBob Peterson
136653dbc27eSBob Peterson if (gfs2_inode_already_deleted(ip->i_gl, ip->i_no_formal_ino))
136753dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE;
136853dbc27eSBob Peterson ret = gfs2_check_blk_type(sdp, ip->i_no_addr, GFS2_BLKST_UNLINKED);
136953dbc27eSBob Peterson if (ret)
137053dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE;
137153dbc27eSBob Peterson
1372f2e70d8fSBob Peterson ret = gfs2_instantiate(gh);
137353dbc27eSBob Peterson if (ret)
137453dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE;
137553dbc27eSBob Peterson
137653dbc27eSBob Peterson /*
137753dbc27eSBob Peterson * The inode may have been recreated in the meantime.
137853dbc27eSBob Peterson */
137953dbc27eSBob Peterson if (inode->i_nlink)
138053dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE;
138153dbc27eSBob Peterson
138253dbc27eSBob Peterson should_delete:
138353dbc27eSBob Peterson if (gfs2_holder_initialized(&ip->i_iopen_gh) &&
138453dbc27eSBob Peterson test_bit(HIF_HOLDER, &ip->i_iopen_gh.gh_iflags)) {
138553dbc27eSBob Peterson if (!gfs2_upgrade_iopen_glock(inode)) {
138653dbc27eSBob Peterson gfs2_holder_uninit(&ip->i_iopen_gh);
138753dbc27eSBob Peterson return SHOULD_NOT_DELETE_DINODE;
138853dbc27eSBob Peterson }
138953dbc27eSBob Peterson }
139053dbc27eSBob Peterson return SHOULD_DELETE_DINODE;
139153dbc27eSBob Peterson }
139253dbc27eSBob Peterson
139353dbc27eSBob Peterson /**
13946e7e9a50SBob Peterson * evict_unlinked_inode - delete the pieces of an unlinked evicted inode
13956e7e9a50SBob Peterson * @inode: The inode to evict
13966e7e9a50SBob Peterson */
evict_unlinked_inode(struct inode * inode)13976e7e9a50SBob Peterson static int evict_unlinked_inode(struct inode *inode)
13986e7e9a50SBob Peterson {
13996e7e9a50SBob Peterson struct gfs2_inode *ip = GFS2_I(inode);
14006e7e9a50SBob Peterson int ret;
14016e7e9a50SBob Peterson
14026e7e9a50SBob Peterson if (S_ISDIR(inode->i_mode) &&
14036e7e9a50SBob Peterson (ip->i_diskflags & GFS2_DIF_EXHASH)) {
14046e7e9a50SBob Peterson ret = gfs2_dir_exhash_dealloc(ip);
14056e7e9a50SBob Peterson if (ret)
14066e7e9a50SBob Peterson goto out;
14076e7e9a50SBob Peterson }
14086e7e9a50SBob Peterson
14096e7e9a50SBob Peterson if (ip->i_eattr) {
14106e7e9a50SBob Peterson ret = gfs2_ea_dealloc(ip);
14116e7e9a50SBob Peterson if (ret)
14126e7e9a50SBob Peterson goto out;
14136e7e9a50SBob Peterson }
14146e7e9a50SBob Peterson
14156e7e9a50SBob Peterson if (!gfs2_is_stuffed(ip)) {
14166e7e9a50SBob Peterson ret = gfs2_file_dealloc(ip);
14176e7e9a50SBob Peterson if (ret)
14186e7e9a50SBob Peterson goto out;
14196e7e9a50SBob Peterson }
14206e7e9a50SBob Peterson
1421764665c6SAndreas Gruenbacher /*
1422764665c6SAndreas Gruenbacher * As soon as we clear the bitmap for the dinode, gfs2_create_inode()
1423764665c6SAndreas Gruenbacher * can get called to recreate it, or even gfs2_inode_lookup() if the
1424764665c6SAndreas Gruenbacher * inode was recreated on another node in the meantime.
1425764665c6SAndreas Gruenbacher *
1426764665c6SAndreas Gruenbacher * However, inserting the new inode into the inode hash table will not
1427764665c6SAndreas Gruenbacher * succeed until the old inode is removed, and that only happens after
1428764665c6SAndreas Gruenbacher * ->evict_inode() returns. The new inode is attached to its inode and
1429764665c6SAndreas Gruenbacher * iopen glocks after inserting it into the inode hash table, so at
1430764665c6SAndreas Gruenbacher * that point we can be sure that both glocks are unused.
1431764665c6SAndreas Gruenbacher */
1432764665c6SAndreas Gruenbacher
143338552ff6SAndreas Gruenbacher ret = gfs2_dinode_dealloc(ip);
1434f9da18cdSBob Peterson if (!ret && ip->i_gl)
1435f9da18cdSBob Peterson gfs2_inode_remember_delete(ip->i_gl, ip->i_no_formal_ino);
1436f9da18cdSBob Peterson
14376e7e9a50SBob Peterson out:
14386e7e9a50SBob Peterson return ret;
14396e7e9a50SBob Peterson }
14406e7e9a50SBob Peterson
1441d90be6abSBob Peterson /*
1442d90be6abSBob Peterson * evict_linked_inode - evict an inode whose dinode has not been unlinked
1443d90be6abSBob Peterson * @inode: The inode to evict
1444d90be6abSBob Peterson */
evict_linked_inode(struct inode * inode)1445d90be6abSBob Peterson static int evict_linked_inode(struct inode *inode)
1446d90be6abSBob Peterson {
1447d90be6abSBob Peterson struct super_block *sb = inode->i_sb;
1448d90be6abSBob Peterson struct gfs2_sbd *sdp = sb->s_fs_info;
1449d90be6abSBob Peterson struct gfs2_inode *ip = GFS2_I(inode);
1450d90be6abSBob Peterson struct address_space *metamapping;
1451d90be6abSBob Peterson int ret;
1452d90be6abSBob Peterson
1453d90be6abSBob Peterson gfs2_log_flush(sdp, ip->i_gl, GFS2_LOG_HEAD_FLUSH_NORMAL |
1454d90be6abSBob Peterson GFS2_LFC_EVICT_INODE);
1455d90be6abSBob Peterson metamapping = gfs2_glock2aspace(ip->i_gl);
1456d90be6abSBob Peterson if (test_bit(GLF_DIRTY, &ip->i_gl->gl_flags)) {
1457d90be6abSBob Peterson filemap_fdatawrite(metamapping);
1458d90be6abSBob Peterson filemap_fdatawait(metamapping);
1459d90be6abSBob Peterson }
1460d90be6abSBob Peterson write_inode_now(inode, 1);
1461d90be6abSBob Peterson gfs2_ail_flush(ip->i_gl, 0);
1462d90be6abSBob Peterson
1463d90be6abSBob Peterson ret = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
1464d90be6abSBob Peterson if (ret)
1465d90be6abSBob Peterson return ret;
1466d90be6abSBob Peterson
1467d90be6abSBob Peterson /* Needs to be done before glock release & also in a transaction */
1468d90be6abSBob Peterson truncate_inode_pages(&inode->i_data, 0);
1469d90be6abSBob Peterson truncate_inode_pages(metamapping, 0);
1470d90be6abSBob Peterson gfs2_trans_end(sdp);
1471d90be6abSBob Peterson return 0;
1472d90be6abSBob Peterson }
1473d90be6abSBob Peterson
14746e7e9a50SBob Peterson /**
1475380f7c65SSteven Whitehouse * gfs2_evict_inode - Remove an inode from cache
1476380f7c65SSteven Whitehouse * @inode: The inode to evict
1477380f7c65SSteven Whitehouse *
1478380f7c65SSteven Whitehouse * There are three cases to consider:
1479380f7c65SSteven Whitehouse * 1. i_nlink == 0, we are final opener (and must deallocate)
1480380f7c65SSteven Whitehouse * 2. i_nlink == 0, we are not the final opener (and cannot deallocate)
1481380f7c65SSteven Whitehouse * 3. i_nlink > 0
1482380f7c65SSteven Whitehouse *
1483380f7c65SSteven Whitehouse * If the fs is read only, then we have to treat all cases as per #3
1484380f7c65SSteven Whitehouse * since we are unable to do any deallocation. The inode will be
1485380f7c65SSteven Whitehouse * deallocated by the next read/write node to attempt an allocation
1486380f7c65SSteven Whitehouse * in the same resource group
1487380f7c65SSteven Whitehouse *
14889e6e0a12SSteven Whitehouse * We have to (at the moment) hold the inodes main lock to cover
14899e6e0a12SSteven Whitehouse * the gap between unlocking the shared lock on the iopen lock and
14909e6e0a12SSteven Whitehouse * taking the exclusive lock. I'd rather do a shared -> exclusive
14919e6e0a12SSteven Whitehouse * conversion on the iopen lock, but we can change that later. This
14929e6e0a12SSteven Whitehouse * is safe, just less efficient.
14939e6e0a12SSteven Whitehouse */
14949e6e0a12SSteven Whitehouse
gfs2_evict_inode(struct inode * inode)1495d5c1515cSAl Viro static void gfs2_evict_inode(struct inode *inode)
14969e6e0a12SSteven Whitehouse {
1497001e8e8dSSteven Whitehouse struct super_block *sb = inode->i_sb;
1498001e8e8dSSteven Whitehouse struct gfs2_sbd *sdp = sb->s_fs_info;
14999e6e0a12SSteven Whitehouse struct gfs2_inode *ip = GFS2_I(inode);
15009e6e0a12SSteven Whitehouse struct gfs2_holder gh;
150123d828fcSBob Peterson int ret;
15029e6e0a12SSteven Whitehouse
150338552ff6SAndreas Gruenbacher if (inode->i_nlink || sb_rdonly(sb) || !ip->i_no_addr)
1504d5c1515cSAl Viro goto out;
1505d5c1515cSAl Viro
1506504a10d9SBob Peterson /*
1507504a10d9SBob Peterson * In case of an incomplete mount, gfs2_evict_inode() may be called for
1508504a10d9SBob Peterson * system files without having an active journal to write to. In that
1509504a10d9SBob Peterson * case, skip the filesystem evict.
1510504a10d9SBob Peterson */
1511504a10d9SBob Peterson if (!sdp->sd_jdesc)
1512504a10d9SBob Peterson goto out;
1513504a10d9SBob Peterson
1514e0b62e21SAndreas Gruenbacher gfs2_holder_mark_uninitialized(&gh);
151553dbc27eSBob Peterson ret = evict_should_delete(inode, &gh);
151653dbc27eSBob Peterson if (ret == SHOULD_DEFER_EVICTION)
15178c7b9262SAndreas Gruenbacher goto out;
15180a0d9f55SBob Peterson if (ret == SHOULD_DELETE_DINODE)
15196e7e9a50SBob Peterson ret = evict_unlinked_inode(inode);
15200a0d9f55SBob Peterson else
1521d90be6abSBob Peterson ret = evict_linked_inode(inode);
15229e6e0a12SSteven Whitehouse
1523a097dc7eSBob Peterson if (gfs2_rs_active(&ip->i_res))
1524a097dc7eSBob Peterson gfs2_rs_deltree(&ip->i_res);
15258e2e0047SBob Peterson
15269ffa1888SAndreas Gruenbacher if (gfs2_holder_initialized(&gh))
15279e6e0a12SSteven Whitehouse gfs2_glock_dq_uninit(&gh);
152823d828fcSBob Peterson if (ret && ret != GLR_TRYFAILED && ret != -EROFS)
152923d828fcSBob Peterson fs_warn(sdp, "gfs2_evict_inode: %d\n", ret);
15309e6e0a12SSteven Whitehouse out:
153191b0abe3SJohannes Weiner truncate_inode_pages_final(&inode->i_data);
15322fba46a0SBob Peterson if (ip->i_qadata)
15332fba46a0SBob Peterson gfs2_assert_warn(sdp, ip->i_qadata->qa_ref == 0);
15347336905aSAndreas Gruenbacher gfs2_rs_deltree(&ip->i_res);
153545138990SSteven Whitehouse gfs2_ordered_del_inode(ip);
1536dbd5768fSJan Kara clear_inode(inode);
153717d539f0SSteven Whitehouse gfs2_dir_hash_inval(ip);
15386df9f9a2SAndreas Gruenbacher if (gfs2_holder_initialized(&ip->i_iopen_gh)) {
153971c1b213SAndreas Gruenbacher struct gfs2_glock *gl = ip->i_iopen_gh.gh_gl;
154071c1b213SAndreas Gruenbacher
154171c1b213SAndreas Gruenbacher glock_clear_object(gl, ip);
154271c1b213SAndreas Gruenbacher gfs2_glock_hold(gl);
1543fe1bff65SAndreas Gruenbacher ip->i_iopen_gh.gh_flags |= GL_NOCACHE;
1544fe1bff65SAndreas Gruenbacher gfs2_glock_dq_uninit(&ip->i_iopen_gh);
154571c1b213SAndreas Gruenbacher gfs2_glock_put_eventually(gl);
1546d5c1515cSAl Viro }
154749462e2bSBob Peterson if (ip->i_gl) {
154849462e2bSBob Peterson glock_clear_object(ip->i_gl, ip);
154949462e2bSBob Peterson wait_on_bit_io(&ip->i_flags, GIF_GLOP_PENDING, TASK_UNINTERRUPTIBLE);
155049462e2bSBob Peterson gfs2_glock_add_to_lru(ip->i_gl);
155149462e2bSBob Peterson gfs2_glock_put_eventually(ip->i_gl);
15527f9b5e97SAl Viro rcu_assign_pointer(ip->i_gl, NULL);
155349462e2bSBob Peterson }
15549e6e0a12SSteven Whitehouse }
15559e6e0a12SSteven Whitehouse
gfs2_alloc_inode(struct super_block * sb)15569e6e0a12SSteven Whitehouse static struct inode *gfs2_alloc_inode(struct super_block *sb)
15579e6e0a12SSteven Whitehouse {
15589e6e0a12SSteven Whitehouse struct gfs2_inode *ip;
15599e6e0a12SSteven Whitehouse
1560fd60b288SMuchun Song ip = alloc_inode_sb(sb, gfs2_inode_cachep, GFP_KERNEL);
1561d4031259SAndreas Gruenbacher if (!ip)
1562d4031259SAndreas Gruenbacher return NULL;
156338552ff6SAndreas Gruenbacher ip->i_no_addr = 0;
15649e6e0a12SSteven Whitehouse ip->i_flags = 0;
15659e6e0a12SSteven Whitehouse ip->i_gl = NULL;
156640e7e86eSAndreas Gruenbacher gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
1567a097dc7eSBob Peterson memset(&ip->i_res, 0, sizeof(ip->i_res));
1568a097dc7eSBob Peterson RB_CLEAR_NODE(&ip->i_res.rs_node);
1569c8d57703SAndreas Gruenbacher ip->i_rahead = 0;
15709e6e0a12SSteven Whitehouse return &ip->i_inode;
15719e6e0a12SSteven Whitehouse }
15729e6e0a12SSteven Whitehouse
gfs2_free_inode(struct inode * inode)1573784494e1SAl Viro static void gfs2_free_inode(struct inode *inode)
1574fa0d7e3dSNick Piggin {
1575784494e1SAl Viro kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode));
15769e6e0a12SSteven Whitehouse }
15779e6e0a12SSteven Whitehouse
free_local_statfs_inodes(struct gfs2_sbd * sdp)1578d312fbf6SAndreas Gruenbacher void free_local_statfs_inodes(struct gfs2_sbd *sdp)
157997fd734bSAbhi Das {
158097fd734bSAbhi Das struct local_statfs_inode *lsi, *safe;
158197fd734bSAbhi Das
158297fd734bSAbhi Das /* Run through the statfs inodes list to iput and free memory */
158397fd734bSAbhi Das list_for_each_entry_safe(lsi, safe, &sdp->sd_sc_inodes_list, si_list) {
158497fd734bSAbhi Das if (lsi->si_jid == sdp->sd_jdesc->jd_jid)
158597fd734bSAbhi Das sdp->sd_sc_inode = NULL; /* belongs to this node */
158697fd734bSAbhi Das if (lsi->si_sc_inode)
158797fd734bSAbhi Das iput(lsi->si_sc_inode);
158897fd734bSAbhi Das list_del(&lsi->si_list);
158997fd734bSAbhi Das kfree(lsi);
159097fd734bSAbhi Das }
159197fd734bSAbhi Das }
159297fd734bSAbhi Das
find_local_statfs_inode(struct gfs2_sbd * sdp,unsigned int index)1593d312fbf6SAndreas Gruenbacher struct inode *find_local_statfs_inode(struct gfs2_sbd *sdp,
159497fd734bSAbhi Das unsigned int index)
159597fd734bSAbhi Das {
159697fd734bSAbhi Das struct local_statfs_inode *lsi;
159797fd734bSAbhi Das
159897fd734bSAbhi Das /* Return the local (per node) statfs inode in the
159997fd734bSAbhi Das * sdp->sd_sc_inodes_list corresponding to the 'index'. */
160097fd734bSAbhi Das list_for_each_entry(lsi, &sdp->sd_sc_inodes_list, si_list) {
160197fd734bSAbhi Das if (lsi->si_jid == index)
160297fd734bSAbhi Das return lsi->si_sc_inode;
160397fd734bSAbhi Das }
160497fd734bSAbhi Das return NULL;
160597fd734bSAbhi Das }
160697fd734bSAbhi Das
16079e6e0a12SSteven Whitehouse const struct super_operations gfs2_super_ops = {
16089e6e0a12SSteven Whitehouse .alloc_inode = gfs2_alloc_inode,
1609784494e1SAl Viro .free_inode = gfs2_free_inode,
16109e6e0a12SSteven Whitehouse .write_inode = gfs2_write_inode,
1611ab9bbda0SSteven Whitehouse .dirty_inode = gfs2_dirty_inode,
1612d5c1515cSAl Viro .evict_inode = gfs2_evict_inode,
16139e6e0a12SSteven Whitehouse .put_super = gfs2_put_super,
16149e6e0a12SSteven Whitehouse .sync_fs = gfs2_sync_fs,
1615097cca52SAndreas Gruenbacher .freeze_super = gfs2_freeze_super,
1616097cca52SAndreas Gruenbacher .thaw_super = gfs2_thaw_super,
16179e6e0a12SSteven Whitehouse .statfs = gfs2_statfs,
16189e6e0a12SSteven Whitehouse .drop_inode = gfs2_drop_inode,
16199e6e0a12SSteven Whitehouse .show_options = gfs2_show_options,
16209e6e0a12SSteven Whitehouse };
16219e6e0a12SSteven Whitehouse
1622