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/spinlock.h>
  11 #include <linux/completion.h>
  12 #include <linux/buffer_head.h>
  13 #include <linux/crc32.h>
  14 #include <linux/gfs2_ondisk.h>
  15 #include <asm/uaccess.h>
  16
  17 #include "gfs2.h"
  18 #include "incore.h"
  19 #include "glock.h"
  20 #include "util.h"
  21
  22 struct kmem_cache *gfs2_glock_cachep __read_mostly;
  23 struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
  24 struct kmem_cache *gfs2_inode_cachep __read_mostly;
  25 struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
  26 struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
  27 struct kmem_cache *gfs2_quotad_cachep __read_mostly;
  28 struct kmem_cache *gfs2_rsrv_cachep __read_mostly;
  29 mempool_t *gfs2_page_pool __read_mostly;
  30
  31 void gfs2_assert_i(struct gfs2_sbd *sdp)
  32 {
  33         pr_emerg("GFS2: fsid=%s: fatal assertion failed\n", sdp->sd_fsname);
  34 }
  35
  36 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
  37 {
  38         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
  39         const struct lm_lockops *lm = ls->ls_ops;
  40         va_list args;
  41
  42         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
  43             test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
  44                 return 0;
  45
  46         va_start(args, fmt);
  47         vprintk(fmt, args);
  48         va_end(args);
  49
  50         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
  51                 fs_err(sdp, "about to withdraw this file system\n");
  52                 BUG_ON(sdp->sd_args.ar_debug);
  53
  54                 kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
  55
  56                 if (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
  57                         wait_for_completion(&sdp->sd_wdack);
  58
  59                 if (lm->lm_unmount) {
  60                         fs_err(sdp, "telling LM to unmount\n");
  61                         lm->lm_unmount(sdp);
  62                 }
  63                 fs_err(sdp, "withdrawn\n");
  64                 dump_stack();
  65         }
  66
  67         if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
  68                 panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname);
  69
  70         return -1;
  71 }
  72
  73 /**
  74  * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
  75  * Returns: -1 if this call withdrew the machine,
  76  *          -2 if it was already withdrawn
  77  */
  78
  79 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
  80                            const char *function, char *file, unsigned int line)
  81 {
  82         int me;
  83         me = gfs2_lm_withdraw(sdp,
  84                 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
  85                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  86                 sdp->sd_fsname, assertion,
  87                 sdp->sd_fsname, function, file, line);
  88         dump_stack();
  89         return (me) ? -1 : -2;
  90 }
  91
  92 /**
  93  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
  94  * Returns: -1 if we printed something
  95  *          -2 if we didn't
  96  */
  97
  98 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
  99                        const char *function, char *file, unsigned int line)
 100 {
 101         if (time_before(jiffies,
 102                         sdp->sd_last_warning +
 103                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
 104                 return -2;
 105
 106         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
 107                 pr_warn("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
 108                        "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 109                        sdp->sd_fsname, assertion,
 110                        sdp->sd_fsname, function, file, line);
 111
 112         if (sdp->sd_args.ar_debug)
 113                 BUG();
 114         else
 115                 dump_stack();
 116
 117         if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
 118                 panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
 119                       "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 120                       sdp->sd_fsname, assertion,
 121                       sdp->sd_fsname, function, file, line);
 122
 123         sdp->sd_last_warning = jiffies;
 124
 125         return -1;
 126 }
 127
 128 /**
 129  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
 130  * Returns: -1 if this call withdrew the machine,
 131  *          0 if it was already withdrawn
 132  */
 133
 134 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
 135                    char *file, unsigned int line)
 136 {
 137         int rv;
 138         rv = gfs2_lm_withdraw(sdp,
 139                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 140                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 141                 sdp->sd_fsname,
 142                 sdp->sd_fsname, function, file, line);
 143         return rv;
 144 }
 145
 146 /**
 147  * gfs2_consist_inode_i - Flag an inode 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_inode_i(struct gfs2_inode *ip, int cluster_wide,
 153                          const char *function, char *file, unsigned int line)
 154 {
 155         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 156         int rv;
 157         rv = gfs2_lm_withdraw(sdp,
 158                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 159                 "GFS2: fsid=%s:   inode = %llu %llu\n"
 160                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 161                 sdp->sd_fsname,
 162                 sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
 163                 (unsigned long long)ip->i_no_addr,
 164                 sdp->sd_fsname, function, file, line);
 165         return rv;
 166 }
 167
 168 /**
 169  * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
 170  * Returns: -1 if this call withdrew the machine,
 171  *          0 if it was already withdrawn
 172  */
 173
 174 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
 175                          const char *function, char *file, unsigned int line)
 176 {
 177         struct gfs2_sbd *sdp = rgd->rd_sbd;
 178         int rv;
 179         rv = gfs2_lm_withdraw(sdp,
 180                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 181                 "GFS2: fsid=%s:   RG = %llu\n"
 182                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 183                 sdp->sd_fsname,
 184                 sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
 185                 sdp->sd_fsname, function, file, line);
 186         return rv;
 187 }
 188
 189 /**
 190  * gfs2_meta_check_ii - Flag a magic number 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_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 196                        const char *type, const char *function, char *file,
 197                        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 (%s)\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,
 206                 sdp->sd_fsname, function, file, line);
 207         return (me) ? -1 : -2;
 208 }
 209
 210 /**
 211  * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
 212  * Returns: -1 if this call withdrew the machine,
 213  *          -2 if it was already withdrawn
 214  */
 215
 216 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 217                            u16 type, u16 t, const char *function,
 218                            char *file, unsigned int line)
 219 {
 220         int me;
 221         me = gfs2_lm_withdraw(sdp,
 222                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
 223                 "GFS2: fsid=%s:   bh = %llu (type: exp=%u, found=%u)\n"
 224                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 225                 sdp->sd_fsname,
 226                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
 227                 sdp->sd_fsname, 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                 "GFS2: fsid=%s: fatal: I/O error\n"
 243                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 244                 sdp->sd_fsname,
 245                 sdp->sd_fsname, function, file, line);
 246         return rv;
 247 }
 248
 249 /**
 250  * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
 251  * Returns: -1 if this call withdrew the machine,
 252  *          0 if it was already withdrawn
 253  */
 254
 255 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 256                        const char *function, char *file, unsigned int line)
 257 {
 258         int rv;
 259         rv = gfs2_lm_withdraw(sdp,
 260                 "GFS2: fsid=%s: fatal: I/O error\n"
 261                 "GFS2: fsid=%s:   block = %llu\n"
 262                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 263                 sdp->sd_fsname,
 264                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
 265                 sdp->sd_fsname, function, file, line);
 266         return rv;
 267 }
 268