]> git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - fs/gfs2/util.c
GFS2: Reinstate withdraw ack system
[mirror_ubuntu-zesty-kernel.git] / fs / gfs2 / util.c
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
22 struct kmem_cache *gfs2_glock_cachep __read_mostly;
23 struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
24 struct kmem_cache *gfs2_inode_cachep __read_mostly;
25 struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
26 struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
27 struct kmem_cache *gfs2_quotad_cachep __read_mostly;
28 struct kmem_cache *gfs2_rsrv_cachep __read_mostly;
29 mempool_t *gfs2_page_pool __read_mostly;
30
31 void 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
37 int 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 (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
58 wait_for_completion(&sdp->sd_wdack);
59
60 if (lm->lm_unmount) {
61 fs_err(sdp, "telling LM to unmount\n");
62 lm->lm_unmount(sdp);
63 }
64 fs_err(sdp, "withdrawn\n");
65 dump_stack();
66 }
67
68 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
69 panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname);
70
71 return -1;
72 }
73
74 /**
75 * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
76 * Returns: -1 if this call withdrew the machine,
77 * -2 if it was already withdrawn
78 */
79
80 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
81 const char *function, char *file, unsigned int line)
82 {
83 int me;
84 me = gfs2_lm_withdraw(sdp,
85 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
86 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
87 sdp->sd_fsname, assertion,
88 sdp->sd_fsname, function, file, line);
89 dump_stack();
90 return (me) ? -1 : -2;
91 }
92
93 /**
94 * gfs2_assert_warn_i - Print a message to the console if @assertion is false
95 * Returns: -1 if we printed something
96 * -2 if we didn't
97 */
98
99 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
100 const char *function, char *file, unsigned int line)
101 {
102 if (time_before(jiffies,
103 sdp->sd_last_warning +
104 gfs2_tune_get(sdp, gt_complain_secs) * HZ))
105 return -2;
106
107 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
108 printk(KERN_WARNING
109 "GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
110 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
111 sdp->sd_fsname, assertion,
112 sdp->sd_fsname, function, file, line);
113
114 if (sdp->sd_args.ar_debug)
115 BUG();
116 else
117 dump_stack();
118
119 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
120 panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
121 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
122 sdp->sd_fsname, assertion,
123 sdp->sd_fsname, function, file, line);
124
125 sdp->sd_last_warning = jiffies;
126
127 return -1;
128 }
129
130 /**
131 * gfs2_consist_i - Flag a filesystem consistency error and withdraw
132 * Returns: -1 if this call withdrew the machine,
133 * 0 if it was already withdrawn
134 */
135
136 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
137 char *file, unsigned int line)
138 {
139 int rv;
140 rv = gfs2_lm_withdraw(sdp,
141 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
142 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
143 sdp->sd_fsname,
144 sdp->sd_fsname, function, file, line);
145 return rv;
146 }
147
148 /**
149 * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
150 * Returns: -1 if this call withdrew the machine,
151 * 0 if it was already withdrawn
152 */
153
154 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
155 const char *function, char *file, unsigned int line)
156 {
157 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
158 int rv;
159 rv = gfs2_lm_withdraw(sdp,
160 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
161 "GFS2: fsid=%s: inode = %llu %llu\n"
162 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
163 sdp->sd_fsname,
164 sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
165 (unsigned long long)ip->i_no_addr,
166 sdp->sd_fsname, function, file, line);
167 return rv;
168 }
169
170 /**
171 * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
172 * Returns: -1 if this call withdrew the machine,
173 * 0 if it was already withdrawn
174 */
175
176 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
177 const char *function, char *file, unsigned int line)
178 {
179 struct gfs2_sbd *sdp = rgd->rd_sbd;
180 int rv;
181 rv = gfs2_lm_withdraw(sdp,
182 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
183 "GFS2: fsid=%s: RG = %llu\n"
184 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
185 sdp->sd_fsname,
186 sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
187 sdp->sd_fsname, 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
197 int 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 "GFS2: fsid=%s: fatal: invalid metadata block\n"
204 "GFS2: fsid=%s: bh = %llu (%s)\n"
205 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
206 sdp->sd_fsname,
207 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
208 sdp->sd_fsname, function, file, line);
209 return (me) ? -1 : -2;
210 }
211
212 /**
213 * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
214 * Returns: -1 if this call withdrew the machine,
215 * -2 if it was already withdrawn
216 */
217
218 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
219 u16 type, u16 t, const char *function,
220 char *file, unsigned int line)
221 {
222 int me;
223 me = gfs2_lm_withdraw(sdp,
224 "GFS2: fsid=%s: fatal: invalid metadata block\n"
225 "GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
226 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
227 sdp->sd_fsname,
228 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
229 sdp->sd_fsname, function, file, line);
230 return (me) ? -1 : -2;
231 }
232
233 /**
234 * gfs2_io_error_i - Flag an I/O error and withdraw
235 * Returns: -1 if this call withdrew the machine,
236 * 0 if it was already withdrawn
237 */
238
239 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
240 unsigned int line)
241 {
242 int rv;
243 rv = gfs2_lm_withdraw(sdp,
244 "GFS2: fsid=%s: fatal: I/O error\n"
245 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
246 sdp->sd_fsname,
247 sdp->sd_fsname, function, file, line);
248 return rv;
249 }
250
251 /**
252 * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
253 * Returns: -1 if this call withdrew the machine,
254 * 0 if it was already withdrawn
255 */
256
257 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
258 const char *function, char *file, unsigned int line)
259 {
260 int rv;
261 rv = gfs2_lm_withdraw(sdp,
262 "GFS2: fsid=%s: fatal: I/O error\n"
263 "GFS2: fsid=%s: block = %llu\n"
264 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
265 sdp->sd_fsname,
266 sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
267 sdp->sd_fsname, function, file, line);
268 return rv;
269 }
270
271 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
272 unsigned int bit, int new_value)
273 {
274 unsigned int c, o, b = bit;
275 int old_value;
276
277 c = b / (8 * PAGE_SIZE);
278 b %= 8 * PAGE_SIZE;
279 o = b / 8;
280 b %= 8;
281
282 old_value = (bitmap[c][o] & (1 << b));
283 gfs2_assert_withdraw(sdp, !old_value != !new_value);
284
285 if (new_value)
286 bitmap[c][o] |= 1 << b;
287 else
288 bitmap[c][o] &= ~(1 << b);
289 }
290