fs/gfs2/util.c

   1 /*
   2  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   3  * Copyright (C) 2004-2005 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 v.2.
   8  */
   9
  10 #include <linux/sched.h>
  11 #include <linux/slab.h>
  12 #include <linux/spinlock.h>
  13 #include <linux/completion.h>
  14 #include <linux/buffer_head.h>
  15 #include <linux/crc32.h>
  16 #include <linux/gfs2_ondisk.h>
  17 #include <asm/semaphore.h>
  18 #include <asm/uaccess.h>
  19
  20 #include "gfs2.h"
  21 #include "lm_interface.h"
  22 #include "incore.h"
  23 #include "glock.h"
  24 #include "lm.h"
  25 #include "util.h"
  26
  27 kmem_cache_t *gfs2_glock_cachep __read_mostly;
  28 kmem_cache_t *gfs2_inode_cachep __read_mostly;
  29 kmem_cache_t *gfs2_bufdata_cachep __read_mostly;
  30
  31 void gfs2_assert_i(struct gfs2_sbd *sdp)
  32 {
  33         printk(KERN_EMERG "GFS2: fsid=%s: fatal assertion failed\n",
  34                sdp->sd_fsname);
  35 }
  36
  37 /**
  38  * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false
  39  * Returns: -1 if this call withdrew the machine,
  40  *          -2 if it was already withdrawn
  41  */
  42
  43 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion,
  44                            const char *function, char *file, unsigned int line)
  45 {
  46         int me;
  47         me = gfs2_lm_withdraw(sdp,
  48                 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n"
  49                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  50                 sdp->sd_fsname, assertion,
  51                 sdp->sd_fsname, function, file, line);
  52         dump_stack();
  53         return (me) ? -1 : -2;
  54 }
  55
  56 /**
  57  * gfs2_assert_warn_i - Print a message to the console if @assertion is false
  58  * Returns: -1 if we printed something
  59  *          -2 if we didn't
  60  */
  61
  62 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion,
  63                        const char *function, char *file, unsigned int line)
  64 {
  65         if (time_before(jiffies,
  66                         sdp->sd_last_warning +
  67                         gfs2_tune_get(sdp, gt_complain_secs) * HZ))
  68                 return -2;
  69
  70         printk(KERN_WARNING
  71                "GFS2: fsid=%s: warning: assertion \"%s\" failed\n"
  72                "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  73                sdp->sd_fsname, assertion,
  74                sdp->sd_fsname, function, file, line);
  75
  76         if (sdp->sd_args.ar_debug)
  77                 BUG();
  78         else
  79                 dump_stack();
  80
  81         sdp->sd_last_warning = jiffies;
  82
  83         return -1;
  84 }
  85
  86 /**
  87  * gfs2_consist_i - Flag a filesystem consistency error and withdraw
  88  * Returns: -1 if this call withdrew the machine,
  89  *          0 if it was already withdrawn
  90  */
  91
  92 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function,
  93                    char *file, unsigned int line)
  94 {
  95         int rv;
  96         rv = gfs2_lm_withdraw(sdp,
  97                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
  98                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
  99                 sdp->sd_fsname,
 100                 sdp->sd_fsname, function, file, line);
 101         return rv;
 102 }
 103
 104 /**
 105  * gfs2_consist_inode_i - Flag an inode consistency error and withdraw
 106  * Returns: -1 if this call withdrew the machine,
 107  *          0 if it was already withdrawn
 108  */
 109
 110 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide,
 111                          const char *function, char *file, unsigned int line)
 112 {
 113         struct gfs2_sbd *sdp = ip->i_sbd;
 114         int rv;
 115         rv = gfs2_lm_withdraw(sdp,
 116                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 117                 "GFS2: fsid=%s:   inode = %llu %llu\n"
 118                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 119                 sdp->sd_fsname,
 120                 sdp->sd_fsname, ip->i_num.no_formal_ino, ip->i_num.no_addr,
 121                 sdp->sd_fsname, function, file, line);
 122         return rv;
 123 }
 124
 125 /**
 126  * gfs2_consist_rgrpd_i - Flag a RG 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_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
 132                          const char *function, char *file, unsigned int line)
 133 {
 134         struct gfs2_sbd *sdp = rgd->rd_sbd;
 135         int rv;
 136         rv = gfs2_lm_withdraw(sdp,
 137                 "GFS2: fsid=%s: fatal: filesystem consistency error\n"
 138                 "GFS2: fsid=%s:   RG = %llu\n"
 139                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 140                 sdp->sd_fsname,
 141                 sdp->sd_fsname, rgd->rd_ri.ri_addr,
 142                 sdp->sd_fsname, function, file, line);
 143         return rv;
 144 }
 145
 146 /**
 147  * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw
 148  * Returns: -1 if this call withdrew the machine,
 149  *          -2 if it was already withdrawn
 150  */
 151
 152 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 153                        const char *type, const char *function, char *file,
 154                        unsigned int line)
 155 {
 156         int me;
 157         me = gfs2_lm_withdraw(sdp,
 158                 "GFS2: fsid=%s: fatal: invalid metadata block\n"
 159                 "GFS2: fsid=%s:   bh = %llu (%s)\n"
 160                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 161                 sdp->sd_fsname,
 162                 sdp->sd_fsname, (uint64_t)bh->b_blocknr, type,
 163                 sdp->sd_fsname, function, file, line);
 164         return (me) ? -1 : -2;
 165 }
 166
 167 /**
 168  * gfs2_metatype_check_ii - Flag a metadata type 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_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh,
 174                            uint16_t type, uint16_t t, const char *function,
 175                            char *file, 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 (type: exp=%u, found=%u)\n"
 181                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 182                 sdp->sd_fsname,
 183                 sdp->sd_fsname, (uint64_t)bh->b_blocknr, type, t,
 184                 sdp->sd_fsname, function, file, line);
 185         return (me) ? -1 : -2;
 186 }
 187
 188 /**
 189  * gfs2_io_error_i - Flag an I/O error and withdraw
 190  * Returns: -1 if this call withdrew the machine,
 191  *          0 if it was already withdrawn
 192  */
 193
 194 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file,
 195                     unsigned int line)
 196 {
 197         int rv;
 198         rv = gfs2_lm_withdraw(sdp,
 199                 "GFS2: fsid=%s: fatal: I/O error\n"
 200                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 201                 sdp->sd_fsname,
 202                 sdp->sd_fsname, function, file, line);
 203         return rv;
 204 }
 205
 206 /**
 207  * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw
 208  * Returns: -1 if this call withdrew the machine,
 209  *          0 if it was already withdrawn
 210  */
 211
 212 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 213                        const char *function, char *file, unsigned int line)
 214 {
 215         int rv;
 216         rv = gfs2_lm_withdraw(sdp,
 217                 "GFS2: fsid=%s: fatal: I/O error\n"
 218                 "GFS2: fsid=%s:   block = %llu\n"
 219                 "GFS2: fsid=%s:   function = %s, file = %s, line = %u\n",
 220                 sdp->sd_fsname,
 221                 sdp->sd_fsname, (uint64_t)bh->b_blocknr,
 222                 sdp->sd_fsname, function, file, line);
 223         return rv;
 224 }
 225
 226 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap,
 227                       unsigned int bit, int new_value)
 228 {
 229         unsigned int c, o, b = bit;
 230         int old_value;
 231
 232         c = b / (8 * PAGE_SIZE);
 233         b %= 8 * PAGE_SIZE;
 234         o = b / 8;
 235         b %= 8;
 236
 237         old_value = (bitmap[c][o] & (1 << b));
 238         gfs2_assert_withdraw(sdp, !old_value != !new_value);
 239
 240         if (new_value)
 241                 bitmap[c][o] |= 1 << b;
 242         else
 243                 bitmap[c][o] &= ~(1 << b);
 244 }
 245