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Linux/fs/gfs2/util.c

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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 <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_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 
267 

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