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David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
David Teiglandb3b94fa2006-01-16 16:50:04 +000010#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>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050015#include <linux/gfs2_ondisk.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000016#include <asm/uaccess.h>
17
18#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050019#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000020#include "glock.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050021#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000022
Christoph Lametere18b8902006-12-06 20:33:20 -080023struct kmem_cache *gfs2_glock_cachep __read_mostly;
24struct kmem_cache *gfs2_inode_cachep __read_mostly;
25struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
Bob Peterson6bdd9be2008-01-28 17:20:26 -060026struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
Steven Whitehouse37b2c832008-11-17 14:25:37 +000027struct kmem_cache *gfs2_quotad_cachep __read_mostly;
David Teiglandb3b94fa2006-01-16 16:50:04 +000028
David Teiglandb3b94fa2006-01-16 16:50:04 +000029void 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
Steven Whitehouseda755fd2008-01-30 15:34:04 +000035int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
36{
Steven Whitehousef057f6c2009-01-12 10:43:39 +000037 struct lm_lockstruct *ls = &sdp->sd_lockstruct;
38 const struct lm_lockops *lm = ls->ls_ops;
Steven Whitehouseda755fd2008-01-30 15:34:04 +000039 va_list args;
40
Bob Petersond34843d2009-08-24 10:44:18 +010041 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
42 test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
Steven Whitehouseda755fd2008-01-30 15:34:04 +000043 return 0;
44
45 va_start(args, fmt);
46 vprintk(fmt, args);
47 va_end(args);
48
Bob Petersond34843d2009-08-24 10:44:18 +010049 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
50 fs_err(sdp, "about to withdraw this file system\n");
51 BUG_ON(sdp->sd_args.ar_debug);
Steven Whitehouseda755fd2008-01-30 15:34:04 +000052
Bob Petersond34843d2009-08-24 10:44:18 +010053 kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
Steven Whitehousef057f6c2009-01-12 10:43:39 +000054
Bob Petersond34843d2009-08-24 10:44:18 +010055 if (lm->lm_unmount) {
56 fs_err(sdp, "telling LM to unmount\n");
57 lm->lm_unmount(sdp);
58 }
59 fs_err(sdp, "withdrawn\n");
60 dump_stack();
Steven Whitehousef057f6c2009-01-12 10:43:39 +000061 }
Bob Petersond34843d2009-08-24 10:44:18 +010062
63 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
64 panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname);
Steven Whitehouseda755fd2008-01-30 15:34:04 +000065
66 return -1;
67}
68
David Teiglandb3b94fa2006-01-16 16:50:04 +000069/**
70 * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
71 * Returns: -1 if this call withdrew the machine,
72 * -2 if it was already withdrawn
73 */
74
75int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
76 const char *function, char *file, unsigned int line)
77{
78 int me;
79 me = gfs2_lm_withdraw(sdp,
80 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
81 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
82 sdp->sd_fsname, assertion,
83 sdp->sd_fsname, function, file, line);
Steven Whitehouse18ec7d52006-02-08 11:50:51 +000084 dump_stack();
David Teiglandb3b94fa2006-01-16 16:50:04 +000085 return (me) ? -1 : -2;
86}
87
88/**
89 * gfs2_assert_warn_i - Print a message to the console if @assertion is false
90 * Returns: -1 if we printed something
91 * -2 if we didn't
92 */
93
94int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
95 const char *function, char *file, unsigned int line)
96{
97 if (time_before(jiffies,
98 sdp->sd_last_warning +
99 gfs2_tune_get(sdp, gt_complain_secs) * HZ))
100 return -2;
101
Bob Petersond34843d2009-08-24 10:44:18 +0100102 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
103 printk(KERN_WARNING
104 "GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
105 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
106 sdp->sd_fsname, assertion,
107 sdp->sd_fsname, function, file, line);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000108
109 if (sdp->sd_args.ar_debug)
110 BUG();
Steven Whitehouse18ec7d52006-02-08 11:50:51 +0000111 else
112 dump_stack();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000113
Bob Petersond34843d2009-08-24 10:44:18 +0100114 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
115 panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
116 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
117 sdp->sd_fsname, assertion,
118 sdp->sd_fsname, function, file, line);
119
David Teiglandb3b94fa2006-01-16 16:50:04 +0000120 sdp->sd_last_warning = jiffies;
121
122 return -1;
123}
124
125/**
126 * gfs2_consist_i - Flag a filesystem consistency error and withdraw
127 * Returns: -1 if this call withdrew the machine,
128 * 0 if it was already withdrawn
129 */
130
131int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
132 char *file, unsigned int line)
133{
134 int rv;
135 rv = gfs2_lm_withdraw(sdp,
136 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
137 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
138 sdp->sd_fsname,
139 sdp->sd_fsname, function, file, line);
140 return rv;
141}
142
143/**
144 * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
145 * Returns: -1 if this call withdrew the machine,
146 * 0 if it was already withdrawn
147 */
148
149int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
150 const char *function, char *file, unsigned int line)
151{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400152 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000153 int rv;
154 rv = gfs2_lm_withdraw(sdp,
155 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
156 "GFS2: fsid=%s: inode = %llu %llu\n"
157 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
158 sdp->sd_fsname,
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100159 sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
160 (unsigned long long)ip->i_no_addr,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000161 sdp->sd_fsname, function, file, line);
162 return rv;
163}
164
165/**
166 * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
167 * Returns: -1 if this call withdrew the machine,
168 * 0 if it was already withdrawn
169 */
170
171int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
172 const char *function, char *file, unsigned int line)
173{
174 struct gfs2_sbd *sdp = rgd->rd_sbd;
175 int rv;
176 rv = gfs2_lm_withdraw(sdp,
177 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
178 "GFS2: fsid=%s: RG = %llu\n"
179 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
180 sdp->sd_fsname,
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100181 sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000182 sdp->sd_fsname, function, file, line);
183 return rv;
184}
185
186/**
187 * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
188 * Returns: -1 if this call withdrew the machine,
189 * -2 if it was already withdrawn
190 */
191
192int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
193 const char *type, const char *function, char *file,
194 unsigned int line)
195{
196 int me;
197 me = gfs2_lm_withdraw(sdp,
198 "GFS2: fsid=%s: fatal: invalid metadata block\n"
199 "GFS2: fsid=%s: bh = %llu (%s)\n"
200 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
201 sdp->sd_fsname,
Steven Whitehouse382066d2006-05-24 10:22:09 -0400202 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000203 sdp->sd_fsname, function, file, line);
204 return (me) ? -1 : -2;
205}
206
207/**
208 * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
209 * Returns: -1 if this call withdrew the machine,
210 * -2 if it was already withdrawn
211 */
212
213int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
Steven Whitehousecd915492006-09-04 12:49:07 -0400214 u16 type, u16 t, const char *function,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000215 char *file, unsigned int line)
216{
217 int me;
218 me = gfs2_lm_withdraw(sdp,
219 "GFS2: fsid=%s: fatal: invalid metadata block\n"
220 "GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n"
221 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
222 sdp->sd_fsname,
Steven Whitehouse382066d2006-05-24 10:22:09 -0400223 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000224 sdp->sd_fsname, function, file, line);
225 return (me) ? -1 : -2;
226}
227
228/**
229 * gfs2_io_error_i - Flag an I/O error and withdraw
230 * Returns: -1 if this call withdrew the machine,
231 * 0 if it was already withdrawn
232 */
233
234int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
235 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: function = %s, file = %s, line = %u\n",
241 sdp->sd_fsname,
242 sdp->sd_fsname, function, file, line);
243 return rv;
244}
245
246/**
247 * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
248 * Returns: -1 if this call withdrew the machine,
249 * 0 if it was already withdrawn
250 */
251
252int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
253 const char *function, char *file, unsigned int line)
254{
255 int rv;
256 rv = gfs2_lm_withdraw(sdp,
257 "GFS2: fsid=%s: fatal: I/O error\n"
258 "GFS2: fsid=%s: block = %llu\n"
259 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n",
260 sdp->sd_fsname,
Steven Whitehouse382066d2006-05-24 10:22:09 -0400261 sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000262 sdp->sd_fsname, function, file, line);
263 return rv;
264}
265
David Teiglandb3b94fa2006-01-16 16:50:04 +0000266void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
267 unsigned int bit, int new_value)
268{
269 unsigned int c, o, b = bit;
270 int old_value;
271
272 c = b / (8 * PAGE_SIZE);
273 b %= 8 * PAGE_SIZE;
274 o = b / 8;
275 b %= 8;
276
277 old_value = (bitmap[c][o] & (1 << b));
278 gfs2_assert_withdraw(sdp, !old_value != !new_value);
279
280 if (new_value)
281 bitmap[c][o] |= 1 << b;
282 else
283 bitmap[c][o] &= ~(1 << b);
284}
285