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 #include <linux/slab.h>
  11 #include <linux/spinlock.h>
  12 #include <linux/completion.h>
  13 #include <linux/buffer_head.h>
  14 #include <linux/crc32.h>
  15 #include <linux/gfs2_ondisk.h>
  16 #include <linux/lm_interface.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_inode_cachep __read_mostly;
  26 struct kmem_cache *gfs2_bufdata_cachep __read_mostly;
  27 struct kmem_cache *gfs2_rgrpd_cachep __read_mostly;
  28
  29 void gfs2_assert_i(struct gfs2_sbd *sdp)
  30 {
  31         printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
  32                sdp->sd_fsname);
  33 }
  34
  35 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
  36 {
  37         va_list args;
  38
  39         if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
  40                 return 0;
  41
  42         va_start(args, fmt);
  43         vprintk(fmt, args);
  44         va_end(args);
  45
  46         fs_err(sdp, "about to withdraw this file system\n");
  47         BUG_ON(sdp->sd_args.ar_debug);
  48
  49         fs_err(sdp, "telling LM to withdraw\n");
  50         gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
  51         fs_err(sdp, "withdrawn\n");
  52         dump_stack();
  53
  54         return -1;
  55 }
  56
  57 /**
  58  * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
  59  * Returns: -1 if this call withdrew the machine,
  60  *          -2 if it was already withdrawn
  61  */
  62
  63 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
  64                            const char *function, char *file, unsigned int line)
  65 {
  66         int me;
  67         me = gfs2_lm_withdraw(sdp,
  68                 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
  69                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  70                 sdp->sd_fsname, assertion,
  71                 sdp->sd_fsname, function, file, line);
  72         dump_stack();
  73         return (me) ? -1 : -2;
  74 }
  75
  76 /**
  77  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
  78  * Returns: -1 if we printed something
  79  *          -2 if we didn't
  80  */
  81
  82 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
  83                        const char *function, char *file, unsigned int line)
  84 {
  85         if (time_before(jiffies,
  86                         sdp->sd_last_warning +
  87                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
  88                 return -2;
  89
  90         printk(KERN_WARNING
  91                "GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
  92                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  93                sdp->sd_fsname, assertion,
  94                sdp->sd_fsname, function, file, line);
  95
  96         if (sdp->sd_args.ar_debug)
  97                 BUG();
  98         else
  99                 dump_stack();
 100
 101         sdp->sd_last_warning = jiffies;
 102
 103         return -1;
 104 }
 105
 106 /**
 107  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
 108  * Returns: -1 if this call withdrew the machine,
 109  *          0 if it was already withdrawn
 110  */
 111
 112 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
 113                    char *file, unsigned int line)
 114 {
 115         int rv;
 116         rv = gfs2_lm_withdraw(sdp,
 117                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 118                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 119                 sdp->sd_fsname,
 120                 sdp->sd_fsname, function, file, line);
 121         return rv;
 122 }
 123
 124 /**
 125  * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
 126  * Returns: -1 if this call withdrew the machine,
 127  *          0 if it was already withdrawn
 128  */
 129
 130 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
 131                          const char *function, char *file, unsigned int line)
 132 {
 133         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 134         int rv;
 135         rv = gfs2_lm_withdraw(sdp,
 136                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 137                 "GFS2: fsid=%s:   inode = %llu %llu\n"
 138                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 139                 sdp->sd_fsname,
 140                 sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
 141                 (unsigned long long)ip->i_no_addr,
 142                 sdp->sd_fsname, function, file, line);
 143         return rv;
 144 }
 145
 146 /**
 147  * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
 148  * Returns: -1 if this call withdrew the machine,
 149  *          0 if it was already withdrawn
 150  */
 151
 152 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
 153                          const char *function, char *file, unsigned int line)
 154 {
 155         struct gfs2_sbd *sdp = rgd->rd_sbd;
 156         int rv;
 157         rv = gfs2_lm_withdraw(sdp,
 158                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 159                 "GFS2: fsid=%s:   RG = %llu\n"
 160                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 161                 sdp->sd_fsname,
 162                 sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
 163                 sdp->sd_fsname, function, file, line);
 164         return rv;
 165 }
 166
 167 /**
 168  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
 169  * Returns: -1 if this call withdrew the machine,
 170  *          -2 if it was already withdrawn
 171  */
 172
 173 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 174                        const char *type, const char *function, char *file,
 175                        unsigned int line)
 176 {
 177         int me;
 178         me = gfs2_lm_withdraw(sdp,
 179                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
 180                 "GFS2: fsid=%s:   bh = %llu (%s)\n"
 181                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 182                 sdp->sd_fsname,
 183                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
 184                 sdp->sd_fsname, function, file, line);
 185         return (me) ? -1 : -2;
 186 }
 187
 188 /**
 189  * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
 190  * Returns: -1 if this call withdrew the machine,
 191  *          -2 if it was already withdrawn
 192  */
 193
 194 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 195                            u16 type, u16 t, const char *function,
 196                            char *file, unsigned int line)
 197 {
 198         int me;
 199         me = gfs2_lm_withdraw(sdp,
 200                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
 201                 "GFS2: fsid=%s:   bh = %llu (type: exp=%u, found=%u)\n"
 202                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 203                 sdp->sd_fsname,
 204                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
 205                 sdp->sd_fsname, function, file, line);
 206         return (me) ? -1 : -2;
 207 }
 208
 209 /**
 210  * gfs2_io_error_i - Flag an I/O error and withdraw
 211  * Returns: -1 if this call withdrew the machine,
 212  *          0 if it was already withdrawn
 213  */
 214
 215 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
 216                     unsigned int line)
 217 {
 218         int rv;
 219         rv = gfs2_lm_withdraw(sdp,
 220                 "GFS2: fsid=%s: fatal: I/O error\n"
 221                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 222                 sdp->sd_fsname,
 223                 sdp->sd_fsname, function, file, line);
 224         return rv;
 225 }
 226
 227 /**
 228  * gfs2_io_error_bh_i - Flag a buffer 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_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 234                        const char *function, char *file, unsigned int line)
 235 {
 236         int rv;
 237         rv = gfs2_lm_withdraw(sdp,
 238                 "GFS2: fsid=%s: fatal: I/O error\n"
 239                 "GFS2: fsid=%s:   block = %llu\n"
 240                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 241                 sdp->sd_fsname,
 242                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
 243                 sdp->sd_fsname, function, file, line);
 244         return rv;
 245 }
 246
 247 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
 248                       unsigned int bit, int new_value)
 249 {
 250         unsigned int c, o, b = bit;
 251         int old_value;
 252
 253         c = b / (8 * PAGE_SIZE);
 254         b %= 8 * PAGE_SIZE;
 255         o = b / 8;
 256         b %= 8;
 257
 258         old_value = (bitmap[c][o] & (1 << b));
 259         gfs2_assert_withdraw(sdp, !old_value != !new_value);
 260
 261         if (new_value)
 262                 bitmap[c][o] |= 1 << b;
 263         else
 264                 bitmap[c][o] &= ~(1 << b);
 265 }
 266