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/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 <linux/lm_interface.h> 18 #include <asm/uaccess.h> 19 20 #include "gfs2.h" 21 #include "incore.h" 22 #include "glock.h" 23 #include "lm.h" 24 #include "util.h" 25 26 kmem_cache_t *gfs2_glock_cachep __read_mostly; 27 kmem_cache_t *gfs2_inode_cachep __read_mostly; 28 kmem_cache_t *gfs2_bufdata_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 /** 37 * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false 38 * Returns: -1 if this call withdrew the machine, 39 * -2 if it was already withdrawn 40 */ 41 42 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion, 43 const char *function, char *file, unsigned int line) 44 { 45 int me; 46 me = gfs2_lm_withdraw(sdp, 47 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n" 48 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 49 sdp->sd_fsname, assertion, 50 sdp->sd_fsname, function, file, line); 51 dump_stack(); 52 return (me) ? -1 : -2; 53 } 54 55 /** 56 * gfs2_assert_warn_i - Print a message to the console if @assertion is false 57 * Returns: -1 if we printed something 58 * -2 if we didn't 59 */ 60 61 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion, 62 const char *function, char *file, unsigned int line) 63 { 64 if (time_before(jiffies, 65 sdp->sd_last_warning + 66 gfs2_tune_get(sdp, gt_complain_secs) * HZ)) 67 return -2; 68 69 printk(KERN_WARNING 70 "GFS2: fsid=%s: warning: assertion \"%s\" failed\n" 71 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 72 sdp->sd_fsname, assertion, 73 sdp->sd_fsname, function, file, line); 74 75 if (sdp->sd_args.ar_debug) 76 BUG(); 77 else 78 dump_stack(); 79 80 sdp->sd_last_warning = jiffies; 81 82 return -1; 83 } 84 85 /** 86 * gfs2_consist_i - Flag a filesystem consistency error and withdraw 87 * Returns: -1 if this call withdrew the machine, 88 * 0 if it was already withdrawn 89 */ 90 91 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function, 92 char *file, unsigned int line) 93 { 94 int rv; 95 rv = gfs2_lm_withdraw(sdp, 96 "GFS2: fsid=%s: fatal: filesystem consistency error\n" 97 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 98 sdp->sd_fsname, 99 sdp->sd_fsname, function, file, line); 100 return rv; 101 } 102 103 /** 104 * gfs2_consist_inode_i - Flag an inode consistency error and withdraw 105 * Returns: -1 if this call withdrew the machine, 106 * 0 if it was already withdrawn 107 */ 108 109 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide, 110 const char *function, char *file, unsigned int line) 111 { 112 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 113 int rv; 114 rv = gfs2_lm_withdraw(sdp, 115 "GFS2: fsid=%s: fatal: filesystem consistency error\n" 116 "GFS2: fsid=%s: inode = %llu %llu\n" 117 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 118 sdp->sd_fsname, 119 sdp->sd_fsname, (unsigned long long)ip->i_num.no_formal_ino, 120 (unsigned long long)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, (unsigned long long)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, (unsigned long long)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 u16 type, u16 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, (unsigned long long)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, (unsigned long long)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 } 245 246