release/src-rt-6.x/linux/linux-2.6/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 "lm.h"
  23 #include "util.h"
  24
  25 struct kmem_cache *gfs2_glock_cachep __read_mostly;
  26 struct kmem_cache *gfs2_inode_cachep __read_mostly;
  27 struct kmem_cache *gfs2_bufdata_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 /**
  36  * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
  37  * Returns: -1 if this call withdrew the machine,
  38  *          -2 if it was already withdrawn
  39  */
  40
  41 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
  42                            const char *function, char *file, unsigned int line)
  43 {
  44         int me;
  45         me = gfs2_lm_withdraw(sdp,
  46                 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
  47                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  48                 sdp->sd_fsname, assertion,
  49                 sdp->sd_fsname, function, file, line);
  50         dump_stack();
  51         return (me) ? -1 : -2;
  52 }
  53
  54 /**
  55  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
  56  * Returns: -1 if we printed something
  57  *          -2 if we didn't
  58  */
  59
  60 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
  61                        const char *function, char *file, unsigned int line)
  62 {
  63         if (time_before(jiffies,
  64                         sdp->sd_last_warning +
  65                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
  66                 return -2;
  67
  68         printk(KERN_WARNING
  69                "GFS2: fsid=%s: warning: 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
  74         if (sdp->sd_args.ar_debug)
  75                 BUG();
  76         else
  77                 dump_stack();
  78
  79         sdp->sd_last_warning = jiffies;
  80
  81         return -1;
  82 }
  83
  84 /**
  85  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
  86  * Returns: -1 if this call withdrew the machine,
  87  *          0 if it was already withdrawn
  88  */
  89
  90 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
  91                    char *file, unsigned int line)
  92 {
  93         int rv;
  94         rv = gfs2_lm_withdraw(sdp,
  95                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
  96                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  97                 sdp->sd_fsname,
  98                 sdp->sd_fsname, function, file, line);
  99         return rv;
 100 }
 101
 102 /**
 103  * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
 104  * Returns: -1 if this call withdrew the machine,
 105  *          0 if it was already withdrawn
 106  */
 107
 108 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
 109                          const char *function, char *file, unsigned int line)
 110 {
 111         struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
 112         int rv;
 113         rv = gfs2_lm_withdraw(sdp,
 114                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 115                 "GFS2: fsid=%s:   inode = %llu %llu\n"
 116                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 117                 sdp->sd_fsname,
 118                 sdp->sd_fsname, (unsigned long long)ip->i_num.no_formal_ino,
 119                 (unsigned long long)ip->i_num.no_addr,
 120                 sdp->sd_fsname, function, file, line);
 121         return rv;
 122 }
 123
 124 /**
 125  * gfs2_consist_rgrpd_i - Flag a RG 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_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
 131                          const char *function, char *file, unsigned int line)
 132 {
 133         struct gfs2_sbd *sdp = rgd->rd_sbd;
 134         int rv;
 135         rv = gfs2_lm_withdraw(sdp,
 136                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 137                 "GFS2: fsid=%s:   RG = %llu\n"
 138                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 139                 sdp->sd_fsname,
 140                 sdp->sd_fsname, (unsigned long long)rgd->rd_ri.ri_addr,
 141                 sdp->sd_fsname, function, file, line);
 142         return rv;
 143 }
 144
 145 /**
 146  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
 147  * Returns: -1 if this call withdrew the machine,
 148  *          -2 if it was already withdrawn
 149  */
 150
 151 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 152                        const char *type, const char *function, char *file,
 153                        unsigned int line)
 154 {
 155         int me;
 156         me = gfs2_lm_withdraw(sdp,
 157                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
 158                 "GFS2: fsid=%s:   bh = %llu (%s)\n"
 159                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 160                 sdp->sd_fsname,
 161                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type,
 162                 sdp->sd_fsname, function, file, line);
 163         return (me) ? -1 : -2;
 164 }
 165
 166 /**
 167  * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw
 168  * Returns: -1 if this call withdrew the machine,
 169  *          -2 if it was already withdrawn
 170  */
 171
 172 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 173                            u16 type, u16 t, const char *function,
 174                            char *file, unsigned int line)
 175 {
 176         int me;
 177         me = gfs2_lm_withdraw(sdp,
 178                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
 179                 "GFS2: fsid=%s:   bh = %llu (type: exp=%u, found=%u)\n"
 180                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 181                 sdp->sd_fsname,
 182                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t,
 183                 sdp->sd_fsname, function, file, line);
 184         return (me) ? -1 : -2;
 185 }
 186
 187 /**
 188  * gfs2_io_error_i - Flag an I/O error and withdraw
 189  * Returns: -1 if this call withdrew the machine,
 190  *          0 if it was already withdrawn
 191  */
 192
 193 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
 194                     unsigned int line)
 195 {
 196         int rv;
 197         rv = gfs2_lm_withdraw(sdp,
 198                 "GFS2: fsid=%s: fatal: I/O error\n"
 199                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 200                 sdp->sd_fsname,
 201                 sdp->sd_fsname, function, file, line);
 202         return rv;
 203 }
 204
 205 /**
 206  * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
 207  * Returns: -1 if this call withdrew the machine,
 208  *          0 if it was already withdrawn
 209  */
 210
 211 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 212                        const char *function, char *file, unsigned int line)
 213 {
 214         int rv;
 215         rv = gfs2_lm_withdraw(sdp,
 216                 "GFS2: fsid=%s: fatal: I/O error\n"
 217                 "GFS2: fsid=%s:   block = %llu\n"
 218                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 219                 sdp->sd_fsname,
 220                 sdp->sd_fsname, (unsigned long long)bh->b_blocknr,
 221                 sdp->sd_fsname, function, file, line);
 222         return rv;
 223 }
 224
 225 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
 226                       unsigned int bit, int new_value)
 227 {
 228         unsigned int c, o, b = bit;
 229         int old_value;
 230
 231         c = b / (8 * PAGE_SIZE);
 232         b %= 8 * PAGE_SIZE;
 233         o = b / 8;
 234         b %= 8;
 235
 236         old_value = (bitmap[c][o] & (1 << b));
 237         gfs2_assert_withdraw(sdp, !old_value != !new_value);
 238
 239         if (new_value)
 240                 bitmap[c][o] |= 1 << b;
 241         else
 242                 bitmap[c][o] &= ~(1 << b);
 243 }
 244