GFS2: Fix up jdata writepage/delete_inode
[linux-2.6.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/slab.h>
11 #include <linux/spinlock.h>
12 #include <linux/completion.h>
13 #include <linux/buffer_head.h>
14 #include <linux/crc32.h>
15 #include <linux/gfs2_ondisk.h>
16 #include <linux/lm_interface.h>
17 #include <asm/uaccess.h>
18
19 #include "gfs2.h"
20 #include "incore.h"
21 #include "glock.h"
22 #include "util.h"
23
24 struct kmem_cache *gfs2_glock_cachep __read_mostly;
25 struct kmem_cache *gfs2_inode_cachep __read_mostly;
26 struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
27 struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
28
29 void gfs2_assert_i(struct gfs2_sbd *sdp)
30 {
31         printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
32                sdp->sd_fsname);
33 }
34
35 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
36 {
37         va_list args;
38
39         if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
40                 return 0;
41
42         va_start(args, fmt);
43         vprintk(fmt, args);
44         va_end(args);
45
46         fs_err(sdp, "about to withdraw this file system\n");
47         BUG_ON(sdp->sd_args.ar_debug);
48
49         fs_err(sdp, "telling LM to withdraw\n");
50         gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
51         fs_err(sdp, "withdrawn\n");
52         dump_stack();
53
54         return -1;
55 }
56
57 /**
58  * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
59  * Returns: -1 if this call withdrew the machine,
60  *          -2 if it was already withdrawn
61  */
62
63 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
64                            const char *function, char *file, unsigned int line)
65 {
66         int me;
67         me = gfs2_lm_withdraw(sdp,
68                 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
69                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
70                 sdp->sd_fsname, assertion,
71                 sdp->sd_fsname, function, file, line);
72         dump_stack();
73         return (me) ? -1 : -2;
74 }
75
76 /**
77  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
78  * Returns: -1 if we printed something
79  *          -2 if we didn't
80  */
81
82 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
83                        const char *function, char *file, unsigned int line)
84 {
85         if (time_before(jiffies,
86                         sdp->sd_last_warning +
87                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
88                 return -2;
89
90         printk(KERN_WARNING
91                "GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
92                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
93                sdp->sd_fsname, assertion,
94                sdp->sd_fsname, function, file, line);
95
96         if (sdp->sd_args.ar_debug)
97                 BUG();
98         else
99                 dump_stack();
100
101         sdp->sd_last_warning = jiffies;
102
103         return -1;
104 }
105
106 /**
107  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
108  * Returns: -1 if this call withdrew the machine,
109  *          0 if it was already withdrawn
110  */
111
112 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
113                    char *file, unsigned int line)
114 {
115         int rv;
116         rv = gfs2_lm_withdraw(sdp,
117                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
118                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
119                 sdp->sd_fsname,
120                 sdp->sd_fsname, function, file, line);
121         return rv;
122 }
123
124 /**
125  * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
126  * Returns: -1 if this call withdrew the machine,
127  *          0 if it was already withdrawn
128  */
129
130 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
131                          const char *function, char *file, unsigned int line)
132 {
133         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
134         int rv;
135         rv = gfs2_lm_withdraw(sdp,
136                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
137                 "GFS2: fsid=%s:   inode = %llu %llu\n"
138                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
139                 sdp->sd_fsname,
140                 sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
141                 (unsigned long long)ip->i_no_addr,
142                 sdp->sd_fsname, function, file, line);
143         return rv;
144 }
145
146 /**
147  * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
148  * Returns: -1 if this call withdrew the machine,
149  *          0 if it was already withdrawn
150  */
151
152 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
153                          const char *function, char *file, unsigned int line)
154 {
155         struct gfs2_sbd *sdp = rgd->rd_sbd;
156         int rv;
157         rv = gfs2_lm_withdraw(sdp,
158                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
159                 "GFS2: fsid=%s:   RG = %llu\n"
160                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
161                 sdp->sd_fsname,
162                 sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
163                 sdp->sd_fsname, function, file, line);
164         return rv;
165 }
166
167 /**
168  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
169  * Returns: -1 if this call withdrew the machine,
170  *          -2 if it was already withdrawn
171  */
172
173 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
174                        const char *type, const char *function, char *file,
175                        unsigned int line)
176 {
177         int me;
178         me = gfs2_lm_withdraw(sdp,
179                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
180                 "GFS2: fsid=%s:   bh = %llu (%s)\n"
181                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
182                 sdp->sd_fsname,
183                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
184                 sdp->sd_fsname, function, file, line);
185         return (me) ? -1 : -2;
186 }
187
188 /**
189  * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
190  * Returns: -1 if this call withdrew the machine,
191  *          -2 if it was already withdrawn
192  */
193
194 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
195                            u16 type, u16 t, const char *function,
196                            char *file, 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 (type: exp=%u, found=%u)\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, t,
205                 sdp->sd_fsname, function, file, line);
206         return (me) ? -1 : -2;
207 }
208
209 /**
210  * gfs2_io_error_i - Flag an I/O error and withdraw
211  * Returns: -1 if this call withdrew the machine,
212  *          0 if it was already withdrawn
213  */
214
215 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
216                     unsigned int line)
217 {
218         int rv;
219         rv = gfs2_lm_withdraw(sdp,
220                 "GFS2: fsid=%s: fatal: I/O error\n"
221                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
222                 sdp->sd_fsname,
223                 sdp->sd_fsname, function, file, line);
224         return rv;
225 }
226
227 /**
228  * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
229  * Returns: -1 if this call withdrew the machine,
230  *          0 if it was already withdrawn
231  */
232
233 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
234                        const char *function, char *file, unsigned int line)
235 {
236         int rv;
237         rv = gfs2_lm_withdraw(sdp,
238                 "GFS2: fsid=%s: fatal: I/O error\n"
239                 "GFS2: fsid=%s:   block = %llu\n"
240                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
241                 sdp->sd_fsname,
242                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
243                 sdp->sd_fsname, function, file, line);
244         return rv;
245 }
246
247 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
248                       unsigned int bit, int new_value)
249 {
250         unsigned int c, o, b = bit;
251         int old_value;
252
253         c = b / (8 * PAGE_SIZE);
254         b %= 8 * PAGE_SIZE;
255         o = b / 8;
256         b %= 8;
257
258         old_value = (bitmap[c][o] & (1 << b));
259         gfs2_assert_withdraw(sdp, !old_value != !new_value);
260
261         if (new_value)
262                 bitmap[c][o] |= 1 << b;
263         else
264                 bitmap[c][o] &= ~(1 << b);
265 }
266