kernel/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 <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_rsrv_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                 fs_err(sdp, "withdrawn\n");
  72                 dump_stack();
  73         }
  74
  75         if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
  76                 panic("GFS2: fsid=%s: panic requested\n", sdp->sd_fsname);
  77
  78         return -1;
  79 }
  80
  81 /**
  82  * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
  83  * Returns: -1 if this call withdrew the machine,
  84  *          -2 if it was already withdrawn
  85  */
  86
  87 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
  88                            const char *function, char *file, unsigned int line)
  89 {
  90         int me;
  91         me = gfs2_lm_withdraw(sdp,
  92                               "fatal: assertion \"%s\" failed\n"
  93                               "   function = %s, file = %s, line = %u\n",
  94                               assertion, function, file, line);
  95         dump_stack();
  96         return (me) ? -1 : -2;
  97 }
  98
  99 /**
 100  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
 101  * Returns: -1 if we printed something
 102  *          -2 if we didn't
 103  */
 104
 105 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
 106                        const char *function, char *file, unsigned int line)
 107 {
 108         if (time_before(jiffies,
 109                         sdp->sd_last_warning +
 110                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
 111                 return -2;
 112
 113         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
 114                 fs_warn(sdp, "warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
 115                         assertion, function, file, line);
 116
 117         if (sdp->sd_args.ar_debug)
 118                 BUG();
 119         else
 120                 dump_stack();
 121
 122         if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
 123                 panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
 124                       "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 125                       sdp->sd_fsname, assertion,
 126                       sdp->sd_fsname, function, file, line);
 127
 128         sdp->sd_last_warning = jiffies;
 129
 130         return -1;
 131 }
 132
 133 /**
 134  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
 135  * Returns: -1 if this call withdrew the machine,
 136  *          0 if it was already withdrawn
 137  */
 138
 139 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
 140                    char *file, unsigned int line)
 141 {
 142         int rv;
 143         rv = gfs2_lm_withdraw(sdp,
 144                               "fatal: filesystem consistency error - function = %s, file = %s, line = %u\n",
 145                               function, file, line);
 146         return rv;
 147 }
 148
 149 /**
 150  * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
 151  * Returns: -1 if this call withdrew the machine,
 152  *          0 if it was already withdrawn
 153  */
 154
 155 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
 156                          const char *function, char *file, unsigned int line)
 157 {
 158         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 159         int rv;
 160         rv = gfs2_lm_withdraw(sdp,
 161                               "fatal: filesystem consistency error\n"
 162                               "  inode = %llu %llu\n"
 163                               "  function = %s, file = %s, line = %u\n",
 164                               (unsigned long long)ip->i_no_formal_ino,
 165                               (unsigned long long)ip->i_no_addr,
 166                               function, file, line);
 167         return rv;
 168 }
 169
 170 /**
 171  * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
 172  * Returns: -1 if this call withdrew the machine,
 173  *          0 if it was already withdrawn
 174  */
 175
 176 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
 177                          const char *function, char *file, unsigned int line)
 178 {
 179         struct gfs2_sbd *sdp = rgd->rd_sbd;
 180         int rv;
 181         rv = gfs2_lm_withdraw(sdp,
 182                               "fatal: filesystem consistency error\n"
 183                               "  RG = %llu\n"
 184                               "  function = %s, file = %s, line = %u\n",
 185                               (unsigned long long)rgd->rd_addr,
 186                               function, file, line);
 187         return rv;
 188 }
 189
 190 /**
 191  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
 192  * Returns: -1 if this call withdrew the machine,
 193  *          -2 if it was already withdrawn
 194  */
 195
 196 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 197                        const char *type, const char *function, char *file,
 198                        unsigned int line)
 199 {
 200         int me;
 201         me = gfs2_lm_withdraw(sdp,
 202                               "fatal: invalid metadata block\n"
 203                               "  bh = %llu (%s)\n"
 204                               "  function = %s, file = %s, line = %u\n",
 205                               (unsigned long long)bh->b_blocknr, type,
 206                               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                               "fatal: invalid metadata block\n"
 223                               "  bh = %llu (type: exp=%u, found=%u)\n"
 224                               "  function = %s, file = %s, line = %u\n",
 225                               (unsigned long long)bh->b_blocknr, type, t,
 226                               function, file, line);
 227         return (me) ? -1 : -2;
 228 }
 229
 230 /**
 231  * gfs2_io_error_i - Flag an I/O error and withdraw
 232  * Returns: -1 if this call withdrew the machine,
 233  *          0 if it was already withdrawn
 234  */
 235
 236 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
 237                     unsigned int line)
 238 {
 239         int rv;
 240         rv = gfs2_lm_withdraw(sdp,
 241                               "fatal: I/O error\n"
 242                               "  function = %s, file = %s, line = %u\n",
 243                               function, file, line);
 244         return rv;
 245 }
 246
 247 /**
 248  * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
 249  * Returns: -1 if this call withdrew the machine,
 250  *          0 if it was already withdrawn
 251  */
 252
 253 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 254                        const char *function, char *file, unsigned int line)
 255 {
 256         int rv;
 257         rv = gfs2_lm_withdraw(sdp,
 258                               "fatal: I/O error\n"
 259                               "  block = %llu\n"
 260                               "  function = %s, file = %s, line = %u\n",
 261                               (unsigned long long)bh->b_blocknr,
 262                               function, file, line);
 263         return rv;
 264 }
 265