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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
24 struct kmem_cache *gfs2_glock_cachep __read_mostly;
25 struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
26 struct kmem_cache *gfs2_inode_cachep __read_mostly;
27 struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
28 struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
29 struct kmem_cache *gfs2_quotad_cachep __read_mostly;
30 struct kmem_cache *gfs2_qadata_cachep __read_mostly;
31 mempool_t *gfs2_page_pool __read_mostly;
32
33 void gfs2_assert_i(struct gfs2_sbd *sdp)
34 {
35         fs_emerg(sdp, "fatal assertion failed\n");
36 }
37
38 int 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
88 int 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
106 int 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
140 int 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
156 int 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
177 int 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
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                               "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
217 int 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
237 int 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
254 int 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