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_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