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 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, const char *fmt, ...)
  37 {
  38         struct lm_lockstruct *ls = &sdp->sd_lockstruct;
  39         const struct lm_lockops *lm = ls->ls_ops;
  40         va_list args;
  41         struct va_format vaf;
  42
  43         if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
  44             test_and_set_bit(SDF_WITHDRAWN, &sdp->sd_flags))
  45                 return 0;
  46
  47         if (fmt) {
  48                 va_start(args, fmt);
  49
  50                 vaf.fmt = fmt;
  51                 vaf.va = &args;
  52
  53                 fs_err(sdp, "%pV", &vaf);
  54
  55                 va_end(args);
  56         }
  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         char fs_id_buf[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
 182         int rv;
 183
 184         sprintf(fs_id_buf, "fsid=%s: ", sdp->sd_fsname);
 185         gfs2_rgrp_dump(NULL, rgd->rd_gl, fs_id_buf);
 186         rv = gfs2_lm_withdraw(sdp,
 187                               "fatal: filesystem consistency error\n"
 188                               "  RG = %llu\n"
 189                               "  function = %s, file = %s, line = %u\n",
 190                               (unsigned long long)rgd->rd_addr,
 191                               function, file, line);
 192         return rv;
 193 }
 194
 195 /**
 196  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
 197  * Returns: -1 if this call withdrew the machine,
 198  *          -2 if it was already withdrawn
 199  */
 200
 201 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 202                        const char *type, const char *function, char *file,
 203                        unsigned int line)
 204 {
 205         int me;
 206         me = gfs2_lm_withdraw(sdp,
 207                               "fatal: invalid metadata block\n"
 208                               "  bh = %llu (%s)\n"
 209                               "  function = %s, file = %s, line = %u\n",
 210                               (unsigned long long)bh->b_blocknr, type,
 211                               function, file, line);
 212         return (me) ? -1 : -2;
 213 }
 214
 215 /**
 216  * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
 217  * Returns: -1 if this call withdrew the machine,
 218  *          -2 if it was already withdrawn
 219  */
 220
 221 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 222                            u16 type, u16 t, const char *function,
 223                            char *file, unsigned int line)
 224 {
 225         int me;
 226         me = gfs2_lm_withdraw(sdp,
 227                               "fatal: invalid metadata block\n"
 228                               "  bh = %llu (type: exp=%u, found=%u)\n"
 229                               "  function = %s, file = %s, line = %u\n",
 230                               (unsigned long long)bh->b_blocknr, type, t,
 231                               function, file, line);
 232         return (me) ? -1 : -2;
 233 }
 234
 235 /**
 236  * gfs2_io_error_i - Flag an I/O error and withdraw
 237  * Returns: -1 if this call withdrew the machine,
 238  *          0 if it was already withdrawn
 239  */
 240
 241 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
 242                     unsigned int line)
 243 {
 244         int rv;
 245         rv = gfs2_lm_withdraw(sdp,
 246                               "fatal: I/O error\n"
 247                               "  function = %s, file = %s, line = %u\n",
 248                               function, file, line);
 249         return rv;
 250 }
 251
 252 /**
 253  * gfs2_io_error_bh_i - Flag a buffer I/O error
 254  * @withdraw: withdraw the filesystem
 255  */
 256
 257 void gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 258                         const char *function, char *file, unsigned int line,
 259                         bool withdraw)
 260 {
 261         if (!test_bit(SDF_WITHDRAWN, &sdp->sd_flags))
 262                 fs_err(sdp,
 263                        "fatal: I/O error\n"
 264                        "  block = %llu\n"
 265                        "  function = %s, file = %s, line = %u\n",
 266                        (unsigned long long)bh->b_blocknr,
 267                        function, file, line);
 268         if (withdraw)
 269                 gfs2_lm_withdraw(sdp, NULL);
 270 }
 271