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 struct kmem_cache *gfs2_quotad_cachep __read_mostly;
  29
  30 void gfs2_assert_i(struct gfs2_sbd *sdp)
  31 {
  32         printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
  33                sdp->sd_fsname);
  34 }
  35
  36 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
  37 {
  38         va_list args;
  39
  40         if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
  41                 return 0;
  42
  43         va_start(args, fmt);
  44         vprintk(fmt, args);
  45         va_end(args);
  46
  47         fs_err(sdp, "about to withdraw this file system\n");
  48         BUG_ON(sdp->sd_args.ar_debug);
  49
  50         fs_err(sdp, "telling LM to withdraw\n");
  51         gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
  52         fs_err(sdp, "withdrawn\n");
  53         dump_stack();
  54
  55         return -1;
  56 }
  57
  58 /**
  59  * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
  60  * Returns: -1 if this call withdrew the machine,
  61  *          -2 if it was already withdrawn
  62  */
  63
  64 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
  65                            const char *function, char *file, unsigned int line)
  66 {
  67         int me;
  68         me = gfs2_lm_withdraw(sdp,
  69                 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
  70                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  71                 sdp->sd_fsname, assertion,
  72                 sdp->sd_fsname, function, file, line);
  73         dump_stack();
  74         return (me) ? -1 : -2;
  75 }
  76
  77 /**
  78  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
  79  * Returns: -1 if we printed something
  80  *          -2 if we didn't
  81  */
  82
  83 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
  84                        const char *function, char *file, unsigned int line)
  85 {
  86         if (time_before(jiffies,
  87                         sdp->sd_last_warning +
  88                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
  89                 return -2;
  90
  91         printk(KERN_WARNING
  92                "GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
  93                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  94                sdp->sd_fsname, assertion,
  95                sdp->sd_fsname, function, file, line);
  96
  97         if (sdp->sd_args.ar_debug)
  98                 BUG();
  99         else
 100                 dump_stack();
 101
 102         sdp->sd_last_warning = jiffies;
 103
 104         return -1;
 105 }
 106
 107 /**
 108  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
 109  * Returns: -1 if this call withdrew the machine,
 110  *          0 if it was already withdrawn
 111  */
 112
 113 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
 114                    char *file, unsigned int line)
 115 {
 116         int rv;
 117         rv = gfs2_lm_withdraw(sdp,
 118                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 119                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 120                 sdp->sd_fsname,
 121                 sdp->sd_fsname, function, file, line);
 122         return rv;
 123 }
 124
 125 /**
 126  * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
 127  * Returns: -1 if this call withdrew the machine,
 128  *          0 if it was already withdrawn
 129  */
 130
 131 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
 132                          const char *function, char *file, unsigned int line)
 133 {
 134         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 135         int rv;
 136         rv = gfs2_lm_withdraw(sdp,
 137                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 138                 "GFS2: fsid=%s:   inode = %llu %llu\n"
 139                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 140                 sdp->sd_fsname,
 141                 sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino,
 142                 (unsigned long long)ip->i_no_addr,
 143                 sdp->sd_fsname, function, file, line);
 144         return rv;
 145 }
 146
 147 /**
 148  * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw
 149  * Returns: -1 if this call withdrew the machine,
 150  *          0 if it was already withdrawn
 151  */
 152
 153 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
 154                          const char *function, char *file, unsigned int line)
 155 {
 156         struct gfs2_sbd *sdp = rgd->rd_sbd;
 157         int rv;
 158         rv = gfs2_lm_withdraw(sdp,
 159                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 160                 "GFS2: fsid=%s:   RG = %llu\n"
 161                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 162                 sdp->sd_fsname,
 163                 sdp->sd_fsname, (unsigned long long)rgd->rd_addr,
 164                 sdp->sd_fsname, function, file, line);
 165         return rv;
 166 }
 167
 168 /**
 169  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
 170  * Returns: -1 if this call withdrew the machine,
 171  *          -2 if it was already withdrawn
 172  */
 173
 174 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 175                        const char *type, const char *function, char *file,
 176                        unsigned int line)
 177 {
 178         int me;
 179         me = gfs2_lm_withdraw(sdp,
 180                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
 181                 "GFS2: fsid=%s:   bh = %llu (%s)\n"
 182                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 183                 sdp->sd_fsname,
 184                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
 185                 sdp->sd_fsname, function, file, line);
 186         return (me) ? -1 : -2;
 187 }
 188
 189 /**
 190  * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
 191  * Returns: -1 if this call withdrew the machine,
 192  *          -2 if it was already withdrawn
 193  */
 194
 195 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 196                            u16 type, u16 t, const char *function,
 197                            char *file, unsigned int line)
 198 {
 199         int me;
 200         me = gfs2_lm_withdraw(sdp,
 201                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
 202                 "GFS2: fsid=%s:   bh = %llu (type: exp=%u, found=%u)\n"
 203                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 204                 sdp->sd_fsname,
 205                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
 206                 sdp->sd_fsname, function, file, line);
 207         return (me) ? -1 : -2;
 208 }
 209
 210 /**
 211  * gfs2_io_error_i - Flag an I/O error and withdraw
 212  * Returns: -1 if this call withdrew the machine,
 213  *          0 if it was already withdrawn
 214  */
 215
 216 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
 217                     unsigned int line)
 218 {
 219         int rv;
 220         rv = gfs2_lm_withdraw(sdp,
 221                 "GFS2: fsid=%s: fatal: I/O error\n"
 222                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 223                 sdp->sd_fsname,
 224                 sdp->sd_fsname, function, file, line);
 225         return rv;
 226 }
 227
 228 /**
 229  * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
 230  * Returns: -1 if this call withdrew the machine,
 231  *          0 if it was already withdrawn
 232  */
 233
 234 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 235                        const char *function, char *file, unsigned int line)
 236 {
 237         int rv;
 238         rv = gfs2_lm_withdraw(sdp,
 239                 "GFS2: fsid=%s: fatal: I/O error\n"
 240                 "GFS2: fsid=%s:   block = %llu\n"
 241                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 242                 sdp->sd_fsname,
 243                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
 244                 sdp->sd_fsname, function, file, line);
 245         return rv;
 246 }
 247
 248 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
 249                       unsigned int bit, int new_value)
 250 {
 251         unsigned int c, o, b = bit;
 252         int old_value;
 253
 254         c = b / (8 * PAGE_SIZE);
 255         b %= 8 * PAGE_SIZE;
 256         o = b / 8;
 257         b %= 8;
 258
 259         old_value = (bitmap[c][o] & (1 << b));
 260         gfs2_assert_withdraw(sdp, !old_value != !new_value);
 261
 262         if (new_value)
 263                 bitmap[c][o] |= 1 << b;
 264         else
 265                 bitmap[c][o] &= ~(1 << b);
 266 }
 267