GFS2: Clean up & move gfs2_quotad
[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 struct kmem_cache *gfs2_quotad_cachep __read_mostly;
29
30 void gfs2_assert_i(struct gfs2_sbd *sdp)
31 {
32         printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
33                sdp->sd_fsname);
34 }
35
36 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
37 {
38         va_list args;
39
40         if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
41                 return 0;
42
43         va_start(args, fmt);
44         vprintk(fmt, args);
45         va_end(args);
46
47         fs_err(sdp, "about to withdraw this file system\n");
48         BUG_ON(sdp->sd_args.ar_debug);
49
50         fs_err(sdp, "telling LM to withdraw\n");
51         gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
52         fs_err(sdp, "withdrawn\n");
53         dump_stack();
54
55         return -1;
56 }
57
58 /**
59  * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
60  * Returns: -1 if this call withdrew the machine,
61  *          -2 if it was already withdrawn
62  */
63
64 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
65                            const char *function, char *file, unsigned int line)
66 {
67         int me;
68         me = gfs2_lm_withdraw(sdp,
69                 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
70                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
71                 sdp->sd_fsname, assertion,
72                 sdp->sd_fsname, function, file, line);
73         dump_stack();
74         return (me) ? -1 : -2;
75 }
76
77 /**
78  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
79  * Returns: -1 if we printed something
80  *          -2 if we didn't
81  */
82
83 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
84                        const char *function, char *file, unsigned int line)
85 {
86         if (time_before(jiffies,
87                         sdp->sd_last_warning +
88                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
89                 return -2;
90
91         printk(KERN_WARNING
92                "GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
93                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
94                sdp->sd_fsname, assertion,
95                sdp->sd_fsname, function, file, line);
96
97         if (sdp->sd_args.ar_debug)
98                 BUG();
99         else
100                 dump_stack();
101
102         sdp->sd_last_warning = jiffies;
103
104         return -1;
105 }
106
107 /**
108  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
109  * Returns: -1 if this call withdrew the machine,
110  *          0 if it was already withdrawn
111  */
112
113 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
114                    char *file, unsigned int line)
115 {
116         int rv;
117         rv = gfs2_lm_withdraw(sdp,
118                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
119                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
120                 sdp->sd_fsname,
121                 sdp->sd_fsname, function, file, line);
122         return rv;
123 }
124
125 /**
126  * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
127  * Returns: -1 if this call withdrew the machine,
128  *          0 if it was already withdrawn
129  */
130
131 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
132                          const char *function, char *file, unsigned int line)
133 {
134         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
135         int rv;
136         rv = gfs2_lm_withdraw(sdp,
137                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
138                 "GFS2: fsid=%s:   inode = %llu %llu\n"
139                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
140                 sdp->sd_fsname,
141                 sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
142                 (unsigned long long)ip->i_no_addr,
143                 sdp->sd_fsname, function, file, line);
144         return rv;
145 }
146
147 /**
148  * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
149  * Returns: -1 if this call withdrew the machine,
150  *          0 if it was already withdrawn
151  */
152
153 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
154                          const char *function, char *file, unsigned int line)
155 {
156         struct gfs2_sbd *sdp = rgd->rd_sbd;
157         int rv;
158         rv = gfs2_lm_withdraw(sdp,
159                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
160                 "GFS2: fsid=%s:   RG = %llu\n"
161                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
162                 sdp->sd_fsname,
163                 sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
164                 sdp->sd_fsname, function, file, line);
165         return rv;
166 }
167
168 /**
169  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
170  * Returns: -1 if this call withdrew the machine,
171  *          -2 if it was already withdrawn
172  */
173
174 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
175                        const char *type, const char *function, char *file,
176                        unsigned int line)
177 {
178         int me;
179         me = gfs2_lm_withdraw(sdp,
180                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
181                 "GFS2: fsid=%s:   bh = %llu (%s)\n"
182                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
183                 sdp->sd_fsname,
184                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
185                 sdp->sd_fsname, function, file, line);
186         return (me) ? -1 : -2;
187 }
188
189 /**
190  * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
191  * Returns: -1 if this call withdrew the machine,
192  *          -2 if it was already withdrawn
193  */
194
195 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
196                            u16 type, u16 t, const char *function,
197                            char *file, unsigned int line)
198 {
199         int me;
200         me = gfs2_lm_withdraw(sdp,
201                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
202                 "GFS2: fsid=%s:   bh = %llu (type: exp=%u, found=%u)\n"
203                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
204                 sdp->sd_fsname,
205                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
206                 sdp->sd_fsname, function, file, line);
207         return (me) ? -1 : -2;
208 }
209
210 /**
211  * gfs2_io_error_i - Flag an I/O error and withdraw
212  * Returns: -1 if this call withdrew the machine,
213  *          0 if it was already withdrawn
214  */
215
216 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
217                     unsigned int line)
218 {
219         int rv;
220         rv = gfs2_lm_withdraw(sdp,
221                 "GFS2: fsid=%s: fatal: I/O error\n"
222                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
223                 sdp->sd_fsname,
224                 sdp->sd_fsname, function, file, line);
225         return rv;
226 }
227
228 /**
229  * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
230  * Returns: -1 if this call withdrew the machine,
231  *          0 if it was already withdrawn
232  */
233
234 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
235                        const char *function, char *file, unsigned int line)
236 {
237         int rv;
238         rv = gfs2_lm_withdraw(sdp,
239                 "GFS2: fsid=%s: fatal: I/O error\n"
240                 "GFS2: fsid=%s:   block = %llu\n"
241                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
242                 sdp->sd_fsname,
243                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
244                 sdp->sd_fsname, function, file, line);
245         return rv;
246 }
247
248 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
249                       unsigned int bit, int new_value)
250 {
251         unsigned int c, o, b = bit;
252         int old_value;
253
254         c = b / (8 * PAGE_SIZE);
255         b %= 8 * PAGE_SIZE;
256         o = b / 8;
257         b %= 8;
258
259         old_value = (bitmap[c][o] & (1 << b));
260         gfs2_assert_withdraw(sdp, !old_value != !new_value);
261
262         if (new_value)
263                 bitmap[c][o] |= 1 << b;
264         else
265                 bitmap[c][o] &= ~(1 << b);
266 }
267