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 #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 "rgrp.h"
  23 #include "util.h"
  24
  25 struct kmem_cache *gfs2_glock_cachep __read_mostly;
  26 struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly;
  27 struct kmem_cache *gfs2_inode_cachep __read_mostly;
  28 struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
  29 struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
  30 struct kmem_cache *gfs2_quotad_cachep __read_mostly;
  31 struct kmem_cache *gfs2_qadata_cachep __read_mostly;
  32 mempool_t *gfs2_page_pool __read_mostly;
  33
  34 void gfs2_assert_i(struct gfs2_sbd *sdp)
  35 {
  36         fs_emerg(sdp, "fatal assertion failed\n");
  37 }
  38
  39 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, const char *fmt, ...)
  40 {
  41         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
  42         const struct lm_lockops *lm = ls->ls_ops;
  43         va_list args;
  44         struct va_format vaf;
  45
  46         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
  47             test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
  48                 return 0;
  49
  50         if (fmt) {
  51                 va_start(args, fmt);
  52
  53                 vaf.fmt = fmt;
  54                 vaf.va = &args;
  55
  56                 fs_err(sdp, "%pV", &vaf);
  57
  58                 va_end(args);
  59         }
  60
  61         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) {
  62                 fs_err(sdp, "about to withdraw this file system\n");
  63                 BUG_ON(sdp->sd_args.ar_debug);
  64
  65                 kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE);
  66
  67                 if (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm"))
  68                         wait_for_completion(&sdp->sd_wdack);
  69
  70                 if (lm->lm_unmount) {
  71                         fs_err(sdp, "telling LM to unmount\n");
  72                         lm->lm_unmount(sdp);
  73                 }
  74                 set_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags);
  75                 fs_err(sdp, "withdrawn\n");
  76                 dump_stack();
  77         }
  78
  79         if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
  80                 panic("GFS2: fsid=%s: panic requested\n", sdp->sd_fsname);
  81
  82         return -1;
  83 }
  84
  85 /**
  86  * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
  87  * Returns: -1 if this call withdrew the machine,
  88  *          -2 if it was already withdrawn
  89  */
  90
  91 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
  92                            const char *function, char *file, unsigned int line)
  93 {
  94         int me;
  95         me = gfs2_lm_withdraw(sdp,
  96                               "fatal: assertion \"%s\" failed\n"
  97                               "   function = %s, file = %s, line = %u\n",
  98                               assertion, function, file, line);
  99         dump_stack();
 100         return (me) ? -1 : -2;
 101 }
 102
 103 /**
 104  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
 105  * Returns: -1 if we printed something
 106  *          -2 if we didn't
 107  */
 108
 109 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
 110                        const char *function, char *file, unsigned int line)
 111 {
 112         if (time_before(jiffies,
 113                         sdp->sd_last_warning +
 114                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
 115                 return -2;
 116
 117         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
 118                 fs_warn(sdp, "warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
 119                         assertion, function, file, line);
 120
 121         if (sdp->sd_args.ar_debug)
 122                 BUG();
 123         else
 124                 dump_stack();
 125
 126         if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
 127                 panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
 128                       "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 129                       sdp->sd_fsname, assertion,
 130                       sdp->sd_fsname, function, file, line);
 131
 132         sdp->sd_last_warning = jiffies;
 133
 134         return -1;
 135 }
 136
 137 /**
 138  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
 139  * Returns: -1 if this call withdrew the machine,
 140  *          0 if it was already withdrawn
 141  */
 142
 143 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
 144                    char *file, unsigned int line)
 145 {
 146         int rv;
 147         rv = gfs2_lm_withdraw(sdp,
 148                               "fatal: filesystem consistency error - function = %s, file = %s, line = %u\n",
 149                               function, file, line);
 150         return rv;
 151 }
 152
 153 /**
 154  * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
 155  * Returns: -1 if this call withdrew the machine,
 156  *          0 if it was already withdrawn
 157  */
 158
 159 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
 160                          const char *function, char *file, unsigned int line)
 161 {
 162         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 163         int rv;
 164         rv = gfs2_lm_withdraw(sdp,
 165                               "fatal: filesystem consistency error\n"
 166                               "  inode = %llu %llu\n"
 167                               "  function = %s, file = %s, line = %u\n",
 168                               (unsigned long long)ip->i_no_formal_ino,
 169                               (unsigned long long)ip->i_no_addr,
 170                               function, file, line);
 171         return rv;
 172 }
 173
 174 /**
 175  * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
 176  * Returns: -1 if this call withdrew the machine,
 177  *          0 if it was already withdrawn
 178  */
 179
 180 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
 181                          const char *function, char *file, unsigned int line)
 182 {
 183         struct gfs2_sbd *sdp = rgd->rd_sbd;
 184         int rv;
 185
 186         gfs2_rgrp_dump(NULL, rgd->rd_gl);
 187         rv = gfs2_lm_withdraw(sdp,
 188                               "fatal: filesystem consistency error\n"
 189                               "  RG = %llu\n"
 190                               "  function = %s, file = %s, line = %u\n",
 191                               (unsigned long long)rgd->rd_addr,
 192                               function, file, line);
 193         return rv;
 194 }
 195
 196 /**
 197  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
 198  * Returns: -1 if this call withdrew the machine,
 199  *          -2 if it was already withdrawn
 200  */
 201
 202 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 203                        const char *type, const char *function, char *file,
 204                        unsigned int line)
 205 {
 206         int me;
 207         me = gfs2_lm_withdraw(sdp,
 208                               "fatal: invalid metadata block\n"
 209                               "  bh = %llu (%s)\n"
 210                               "  function = %s, file = %s, line = %u\n",
 211                               (unsigned long long)bh->b_blocknr, type,
 212                               function, file, line);
 213         return (me) ? -1 : -2;
 214 }
 215
 216 /**
 217  * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
 218  * Returns: -1 if this call withdrew the machine,
 219  *          -2 if it was already withdrawn
 220  */
 221
 222 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 223                            u16 type, u16 t, const char *function,
 224                            char *file, unsigned int line)
 225 {
 226         int me;
 227         me = gfs2_lm_withdraw(sdp,
 228                               "fatal: invalid metadata block\n"
 229                               "  bh = %llu (type: exp=%u, found=%u)\n"
 230                               "  function = %s, file = %s, line = %u\n",
 231                               (unsigned long long)bh->b_blocknr, type, t,
 232                               function, file, line);
 233         return (me) ? -1 : -2;
 234 }
 235
 236 /**
 237  * gfs2_io_error_i - Flag an I/O error and withdraw
 238  * Returns: -1 if this call withdrew the machine,
 239  *          0 if it was already withdrawn
 240  */
 241
 242 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
 243                     unsigned int line)
 244 {
 245         int rv;
 246         rv = gfs2_lm_withdraw(sdp,
 247                               "fatal: I/O error\n"
 248                               "  function = %s, file = %s, line = %u\n",
 249                               function, file, line);
 250         return rv;
 251 }
 252
 253 /**
 254  * gfs2_io_error_bh_i - Flag a buffer I/O error
 255  * @withdraw: withdraw the filesystem
 256  */
 257
 258 void gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 259                         const char *function, char *file, unsigned int line,
 260                         bool withdraw)
 261 {
 262         if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
 263                 fs_err(sdp,
 264                        "fatal: I/O error\n"
 265                        "  block = %llu\n"
 266                        "  function = %s, file = %s, line = %u\n",
 267                        (unsigned long long)bh->b_blocknr,
 268                        function, file, line);
 269         if (withdraw)
 270                 gfs2_lm_withdraw(sdp, NULL);
 271 }
 272