fs/gfs2/util.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
   5  */
   6
   7 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   8
   9 #include <linux/spinlock.h>
  10 #include <linux/completion.h>
  11 #include <linux/buffer_head.h>
  12 #include <linux/crc32.h>
  13 #include <linux/gfs2_ondisk.h>
  14 #include <linux/uaccess.h>
  15
  16 #include "gfs2.h"
  17 #include "incore.h"
  18 #include "glock.h"
  19 #include "rgrp.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_qadata_cachep __read_mostly;
  29 mempool_t *gfs2_page_pool __read_mostly;
  30
  31 void gfs2_assert_i(struct gfs2_sbd *sdp)
  32 {
  33         fs_emerg(sdp, "fatal assertion failed\n");
  34 }
  35
  36 void gfs2_lm(struct gfs2_sbd *sdp, const char *fmt, ...)
  37 {
  38         struct va_format vaf;
  39         va_list args;
  40
  41         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
  42             test_bit(SDF_WITHDRAWN, &sdp->sd_flags))
  43                 return;
  44
  45         va_start(args, fmt);
  46         vaf.fmt = fmt;
  47         vaf.va = &args;
  48         fs_err(sdp, "%pV", &vaf);
  49         va_end(args);
  50 }
  51
  52 int gfs2_withdraw(struct gfs2_sbd *sdp)
  53 {
  54         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
  55         const struct lm_lockops *lm = ls->ls_ops;
  56
  57         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
  58             test_and_set_bit(SDF_WITHDRAWN, &sdp->sd_flags))
  59                 return 0;
  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  */
  88
  89 void gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
  90                             const char *function, char *file, unsigned int line)
  91 {
  92         gfs2_lm(sdp,
  93                 "fatal: assertion \"%s\" failed\n"
  94                 "   function = %s, file = %s, line = %u\n",
  95                 assertion, function, file, line);
  96         gfs2_withdraw(sdp);
  97         dump_stack();
  98 }
  99
 100 /**
 101  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
 102  */
 103
 104 void gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
 105                         const char *function, char *file, unsigned int line)
 106 {
 107         if (time_before(jiffies,
 108                         sdp->sd_last_warning +
 109                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
 110                 return;
 111
 112         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW)
 113                 fs_warn(sdp, "warning: assertion \"%s\" failed at function = %s, file = %s, line = %u\n",
 114                         assertion, function, file, line);
 115
 116         if (sdp->sd_args.ar_debug)
 117                 BUG();
 118         else
 119                 dump_stack();
 120
 121         if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC)
 122                 panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
 123                       "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 124                       sdp->sd_fsname, assertion,
 125                       sdp->sd_fsname, function, file, line);
 126
 127         sdp->sd_last_warning = jiffies;
 128 }
 129
 130 /**
 131  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
 132  */
 133
 134 void gfs2_consist_i(struct gfs2_sbd *sdp, const char *function,
 135                     char *file, unsigned int line)
 136 {
 137         gfs2_lm(sdp,
 138                 "fatal: filesystem consistency error - function = %s, file = %s, line = %u\n",
 139                 function, file, line);
 140         gfs2_withdraw(sdp);
 141 }
 142
 143 /**
 144  * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
 145  */
 146
 147 void gfs2_consist_inode_i(struct gfs2_inode *ip,
 148                           const char *function, char *file, unsigned int line)
 149 {
 150         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 151
 152         gfs2_lm(sdp,
 153                 "fatal: filesystem consistency error\n"
 154                 "  inode = %llu %llu\n"
 155                 "  function = %s, file = %s, line = %u\n",
 156                 (unsigned long long)ip->i_no_formal_ino,
 157                 (unsigned long long)ip->i_no_addr,
 158                 function, file, line);
 159         gfs2_withdraw(sdp);
 160 }
 161
 162 /**
 163  * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
 164  */
 165
 166 void gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd,
 167                           const char *function, char *file, unsigned int line)
 168 {
 169         struct gfs2_sbd *sdp = rgd->rd_sbd;
 170         char fs_id_buf[sizeof(sdp->sd_fsname) + 7];
 171
 172         sprintf(fs_id_buf, "fsid=%s: ", sdp->sd_fsname);
 173         gfs2_rgrp_dump(NULL, rgd->rd_gl, fs_id_buf);
 174         gfs2_lm(sdp,
 175                 "fatal: filesystem consistency error\n"
 176                 "  RG = %llu\n"
 177                 "  function = %s, file = %s, line = %u\n",
 178                 (unsigned long long)rgd->rd_addr,
 179                 function, file, line);
 180         gfs2_withdraw(sdp);
 181 }
 182
 183 /**
 184  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
 185  * Returns: -1 if this call withdrew the machine,
 186  *          -2 if it was already withdrawn
 187  */
 188
 189 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 190                        const char *type, const char *function, char *file,
 191                        unsigned int line)
 192 {
 193         int me;
 194
 195         gfs2_lm(sdp,
 196                 "fatal: invalid metadata block\n"
 197                 "  bh = %llu (%s)\n"
 198                 "  function = %s, file = %s, line = %u\n",
 199                 (unsigned long long)bh->b_blocknr, type,
 200                 function, file, line);
 201         me = gfs2_withdraw(sdp);
 202         return (me) ? -1 : -2;
 203 }
 204
 205 /**
 206  * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
 207  * Returns: -1 if this call withdrew the machine,
 208  *          -2 if it was already withdrawn
 209  */
 210
 211 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 212                            u16 type, u16 t, const char *function,
 213                            char *file, unsigned int line)
 214 {
 215         int me;
 216
 217         gfs2_lm(sdp,
 218                 "fatal: invalid metadata block\n"
 219                 "  bh = %llu (type: exp=%u, found=%u)\n"
 220                 "  function = %s, file = %s, line = %u\n",
 221                 (unsigned long long)bh->b_blocknr, type, t,
 222                 function, file, line);
 223         me = gfs2_withdraw(sdp);
 224         return (me) ? -1 : -2;
 225 }
 226
 227 /**
 228  * gfs2_io_error_i - Flag an I/O error and withdraw
 229  * Returns: -1 if this call withdrew the machine,
 230  *          0 if it was already withdrawn
 231  */
 232
 233 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
 234                     unsigned int line)
 235 {
 236         gfs2_lm(sdp,
 237                 "fatal: I/O error\n"
 238                 "  function = %s, file = %s, line = %u\n",
 239                 function, file, line);
 240         return gfs2_withdraw(sdp);
 241 }
 242
 243 /**
 244  * gfs2_io_error_bh_i - Flag a buffer I/O error
 245  * @withdraw: withdraw the filesystem
 246  */
 247
 248 void gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 249                         const char *function, char *file, unsigned int line,
 250                         bool withdraw)
 251 {
 252         if (gfs2_withdrawn(sdp))
 253                 return;
 254
 255         fs_err(sdp, "fatal: I/O error\n"
 256                "  block = %llu\n"
 257                "  function = %s, file = %s, line = %u\n",
 258                (unsigned long long)bh->b_blocknr, function, file, line);
 259         if (withdraw)
 260                 gfs2_withdraw(sdp);
 261 }
 262