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  74                 fs_err(sdp, "withdrawn\n");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  87  *          -2 if it was already withdrawn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