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1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12#include <linux/spinlock.h>
13#include <linux/completion.h>
14#include <linux/buffer_head.h>
15#include <linux/crc32.h>
16#include <linux/gfs2_ondisk.h>
17#include <linux/uaccess.h>
18
19#include "gfs2.h"
20#include "incore.h"
21#include "glock.h"
22#include "util.h"
23
24struct kmem_cache *gfs2_glock_cachep __read_mostly;
25struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
26struct kmem_cache *gfs2_inode_cachep __read_mostly;
27struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
28struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
29struct kmem_cache *gfs2_quotad_cachep __read_mostly;
30struct kmem_cache *gfs2_qadata_cachep __read_mostly;
31mempool_t *gfs2_page_pool __read_mostly;
32
33void gfs2_assert_i(struct gfs2_sbd *sdp)
34{
35 fs_emerg(sdp, "fatal assertion failed\n");
36}
37
38int gfs2_lm_withdraw(struct gfs2_sbd *sdp, const char *fmt, ...)
39{
40 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
41 const struct lm_lockops *lm = ls->ls_ops;
42 va_list args;
43 struct va_format vaf;
44
45 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
46 test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
47 return 0;
48
49 va_start(args, fmt);
50
51 vaf.fmt = fmt;
52 vaf.va = &args;
53
54 fs_err(sdp, "%pV", &vaf);
55
56 va_end(args);
57
58 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
59 fs_err(sdp, "about to withdraw this file system\n");
60 BUG_ON(sdp->sd_args.ar_debug);
61
62 kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
63
64 if (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
65 wait_for_completion(&sdp->sd_wdack);
66
67 if (lm->lm_unmount) {
68 fs_err(sdp, "telling LM to unmount\n");
69 lm->lm_unmount(sdp);
70 }
71 set_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags);
72 fs_err(sdp, "withdrawn\n");
73 dump_stack();
74 }
75
76 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
77 panic("GFS2: fsid=%s: panic requested\n", sdp->sd_fsname);
78
79 return -1;
80}
81
82/**
83 * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
84 * Returns: -1 if this call withdrew the machine,
85 * -2 if it was already withdrawn
86 */
87
88int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
89 const char *function, char *file, unsigned int line)
90{
91 int me;
92 me = gfs2_lm_withdraw(sdp,
93 "fatal: assertion \"%s\" failed\n"
94 " function = %s, file = %s, line = %u\n",
95 assertion, function, file, line);
96 dump_stack();
97 return (me) ? -1 : -2;
98}
99
100/**
101 * gfs2_assert_warn_i - Print a message to the console if @assertion is false
102 * Returns: -1 if we printed something
103 * -2 if we didn't
104 */
105
106int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
107 const char *function, char *file, unsigned int line)
108{
109 if (time_before(jiffies,
110 sdp->sd_last_warning +
111 gfs2_tune_get(sdp, gt_complain_secs) * HZ))
112 return -2;
113
114 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
115 fs_warn(sdp, "warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
116 assertion, function, file, line);
117
118 if (sdp->sd_args.ar_debug)
119 BUG();
120 else
121 dump_stack();
122
123 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
124 panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
125 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
126 sdp->sd_fsname, assertion,
127 sdp->sd_fsname, function, file, line);
128
129 sdp->sd_last_warning = jiffies;
130
131 return -1;
132}
133
134/**
135 * gfs2_consist_i - Flag a filesystem consistency error and withdraw
136 * Returns: -1 if this call withdrew the machine,
137 * 0 if it was already withdrawn
138 */
139
140int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
141 char *file, unsigned int line)
142{
143 int rv;
144 rv = gfs2_lm_withdraw(sdp,
145 "fatal: filesystem consistency error - function = %s, file = %s, line = %u\n",
146 function, file, line);
147 return rv;
148}
149
150/**
151 * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
152 * Returns: -1 if this call withdrew the machine,
153 * 0 if it was already withdrawn
154 */
155
156int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
157 const char *function, char *file, unsigned int line)
158{
159 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
160 int rv;
161 rv = gfs2_lm_withdraw(sdp,
162 "fatal: filesystem consistency error\n"
163 " inode = %llu %llu\n"
164 " function = %s, file = %s, line = %u\n",
165 (unsigned long long)ip->i_no_formal_ino,
166 (unsigned long long)ip->i_no_addr,
167 function, file, line);
168 return rv;
169}
170
171/**
172 * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
173 * Returns: -1 if this call withdrew the machine,
174 * 0 if it was already withdrawn
175 */
176
177int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
178 const char *function, char *file, unsigned int line)
179{
180 struct gfs2_sbd *sdp = rgd->rd_sbd;
181 int rv;
182 rv = gfs2_lm_withdraw(sdp,
183 "fatal: filesystem consistency error\n"
184 " RG = %llu\n"
185 " function = %s, file = %s, line = %u\n",
186 (unsigned long long)rgd->rd_addr,
187 function, file, line);
188 return rv;
189}
190
191/**
192 * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
193 * Returns: -1 if this call withdrew the machine,
194 * -2 if it was already withdrawn
195 */
196
197int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
198 const char *type, const char *function, char *file,
199 unsigned int line)
200{
201 int me;
202 me = gfs2_lm_withdraw(sdp,
203 "fatal: invalid metadata block\n"
204 " bh = %llu (%s)\n"
205 " function = %s, file = %s, line = %u\n",
206 (unsigned long long)bh->b_blocknr, type,
207 function, file, line);
208 return (me) ? -1 : -2;
209}
210
211/**
212 * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
213 * Returns: -1 if this call withdrew the machine,
214 * -2 if it was already withdrawn
215 */
216
217int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
218 u16 type, u16 t, const char *function,
219 char *file, unsigned int line)
220{
221 int me;
222 me = gfs2_lm_withdraw(sdp,
223 "fatal: invalid metadata block\n"
224 " bh = %llu (type: exp=%u, found=%u)\n"
225 " function = %s, file = %s, line = %u\n",
226 (unsigned long long)bh->b_blocknr, type, t,
227 function, file, line);
228 return (me) ? -1 : -2;
229}
230
231/**
232 * gfs2_io_error_i - Flag an I/O error and withdraw
233 * Returns: -1 if this call withdrew the machine,
234 * 0 if it was already withdrawn
235 */
236
237int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
238 unsigned int line)
239{
240 int rv;
241 rv = gfs2_lm_withdraw(sdp,
242 "fatal: I/O error\n"
243 " function = %s, file = %s, line = %u\n",
244 function, file, line);
245 return rv;
246}
247
248/**
249 * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
250 * Returns: -1 if this call withdrew the machine,
251 * 0 if it was already withdrawn
252 */
253
254int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
255 const char *function, char *file, unsigned int line)
256{
257 int rv;
258 rv = gfs2_lm_withdraw(sdp,
259 "fatal: I/O error\n"
260 " block = %llu\n"
261 " function = %s, file = %s, line = %u\n",
262 (unsigned long long)bh->b_blocknr,
263 function, file, line);
264 return rv;
265}
266
1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#include <linux/spinlock.h>
11#include <linux/completion.h>
12#include <linux/buffer_head.h>
13#include <linux/crc32.h>
14#include <linux/gfs2_ondisk.h>
15#include <asm/uaccess.h>
16
17#include "gfs2.h"
18#include "incore.h"
19#include "glock.h"
20#include "util.h"
21
22struct kmem_cache *gfs2_glock_cachep __read_mostly;
23struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
24struct kmem_cache *gfs2_inode_cachep __read_mostly;
25struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
26struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
27struct kmem_cache *gfs2_quotad_cachep __read_mostly;
28struct kmem_cache *gfs2_rsrv_cachep __read_mostly;
29mempool_t *gfs2_page_pool __read_mostly;
30
31void gfs2_assert_i(struct gfs2_sbd *sdp)
32{
33 printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
34 sdp->sd_fsname);
35}
36
37int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
38{
39 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
40 const struct lm_lockops *lm = ls->ls_ops;
41 va_list args;
42
43 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
44 test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
45 return 0;
46
47 va_start(args, fmt);
48 vprintk(fmt, args);
49 va_end(args);
50
51 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
52 fs_err(sdp, "about to withdraw this file system\n");
53 BUG_ON(sdp->sd_args.ar_debug);
54
55 kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
56
57 if (lm->lm_unmount) {
58 fs_err(sdp, "telling LM to unmount\n");
59 lm->lm_unmount(sdp);
60 }
61 fs_err(sdp, "withdrawn\n");
62 dump_stack();
63 }
64
65 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
66 panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname);
67
68 return -1;
69}
70
71/**
72 * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
73 * Returns: -1 if this call withdrew the machine,
74 * -2 if it was already withdrawn
75 */
76
77int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
78 const char *function, char *file, unsigned int line)
79{
80 int me;
81 me = gfs2_lm_withdraw(sdp,
82 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
83 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
84 sdp->sd_fsname, assertion,
85 sdp->sd_fsname, function, file, line);
86 dump_stack();
87 return (me) ? -1 : -2;
88}
89
90/**
91 * gfs2_assert_warn_i - Print a message to the console if @assertion is false
92 * Returns: -1 if we printed something
93 * -2 if we didn't
94 */
95
96int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
97 const char *function, char *file, unsigned int line)
98{
99 if (time_before(jiffies,
100 sdp->sd_last_warning +
101 gfs2_tune_get(sdp, gt_complain_secs) * HZ))
102 return -2;
103
104 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
105 printk(KERN_WARNING
106 "GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
107 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
108 sdp->sd_fsname, assertion,
109 sdp->sd_fsname, function, file, line);
110
111 if (sdp->sd_args.ar_debug)
112 BUG();
113 else
114 dump_stack();
115
116 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
117 panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
118 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
119 sdp->sd_fsname, assertion,
120 sdp->sd_fsname, function, file, line);
121
122 sdp->sd_last_warning = jiffies;
123
124 return -1;
125}
126
127/**
128 * gfs2_consist_i - Flag a filesystem consistency error and withdraw
129 * Returns: -1 if this call withdrew the machine,
130 * 0 if it was already withdrawn
131 */
132
133int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
134 char *file, unsigned int line)
135{
136 int rv;
137 rv = gfs2_lm_withdraw(sdp,
138 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
139 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
140 sdp->sd_fsname,
141 sdp->sd_fsname, function, file, line);
142 return rv;
143}
144
145/**
146 * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
147 * Returns: -1 if this call withdrew the machine,
148 * 0 if it was already withdrawn
149 */
150
151int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
152 const char *function, char *file, unsigned int line)
153{
154 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
155 int rv;
156 rv = gfs2_lm_withdraw(sdp,
157 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
158 "GFS2: fsid=%s: inode = %llu %llu\n"
159 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
160 sdp->sd_fsname,
161 sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
162 (unsigned long long)ip->i_no_addr,
163 sdp->sd_fsname, function, file, line);
164 return rv;
165}
166
167/**
168 * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
169 * Returns: -1 if this call withdrew the machine,
170 * 0 if it was already withdrawn
171 */
172
173int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
174 const char *function, char *file, unsigned int line)
175{
176 struct gfs2_sbd *sdp = rgd->rd_sbd;
177 int rv;
178 rv = gfs2_lm_withdraw(sdp,
179 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
180 "GFS2: fsid=%s: RG = %llu\n"
181 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
182 sdp->sd_fsname,
183 sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
184 sdp->sd_fsname, function, file, line);
185 return rv;
186}
187
188/**
189 * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
190 * Returns: -1 if this call withdrew the machine,
191 * -2 if it was already withdrawn
192 */
193
194int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
195 const char *type, const char *function, char *file,
196 unsigned int line)
197{
198 int me;
199 me = gfs2_lm_withdraw(sdp,
200 "GFS2: fsid=%s: fatal: invalid metadata block\n"
201 "GFS2: fsid=%s: bh = %llu (%s)\n"
202 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
203 sdp->sd_fsname,
204 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
205 sdp->sd_fsname, function, file, line);
206 return (me) ? -1 : -2;
207}
208
209/**
210 * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
211 * Returns: -1 if this call withdrew the machine,
212 * -2 if it was already withdrawn
213 */
214
215int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
216 u16 type, u16 t, const char *function,
217 char *file, unsigned int line)
218{
219 int me;
220 me = gfs2_lm_withdraw(sdp,
221 "GFS2: fsid=%s: fatal: invalid metadata block\n"
222 "GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
223 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
224 sdp->sd_fsname,
225 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
226 sdp->sd_fsname, function, file, line);
227 return (me) ? -1 : -2;
228}
229
230/**
231 * gfs2_io_error_i - Flag an I/O error and withdraw
232 * Returns: -1 if this call withdrew the machine,
233 * 0 if it was already withdrawn
234 */
235
236int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
237 unsigned int line)
238{
239 int rv;
240 rv = gfs2_lm_withdraw(sdp,
241 "GFS2: fsid=%s: fatal: I/O error\n"
242 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
243 sdp->sd_fsname,
244 sdp->sd_fsname, function, file, line);
245 return rv;
246}
247
248/**
249 * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
250 * Returns: -1 if this call withdrew the machine,
251 * 0 if it was already withdrawn
252 */
253
254int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
255 const char *function, char *file, unsigned int line)
256{
257 int rv;
258 rv = gfs2_lm_withdraw(sdp,
259 "GFS2: fsid=%s: fatal: I/O error\n"
260 "GFS2: fsid=%s: block = %llu\n"
261 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
262 sdp->sd_fsname,
263 sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
264 sdp->sd_fsname, function, file, line);
265 return rv;
266}
267
268void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
269 unsigned int bit, int new_value)
270{
271 unsigned int c, o, b = bit;
272 int old_value;
273
274 c = b / (8 * PAGE_SIZE);
275 b %= 8 * PAGE_SIZE;
276 o = b / 8;
277 b %= 8;
278
279 old_value = (bitmap[c][o] & (1 << b));
280 gfs2_assert_withdraw(sdp, !old_value != !new_value);
281
282 if (new_value)
283 bitmap[c][o] |= 1 << b;
284 else
285 bitmap[c][o] &= ~(1 << b);
286}
287