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/spinlock.h> 11 #include <linux/completion.h> 12 #include <linux/buffer_head.h> 13 #include <linux/crc32.h> 14 #include <linux/gfs2_ondisk.h> 15 #include <asm/uaccess.h> 16 17 #include "gfs2.h" 18 #include "incore.h" 19 #include "glock.h" 20 #include "util.h" 21 22 struct kmem_cache *gfs2_glock_cachep __read_mostly; 23 struct kmem_cache *gfs2_glock_aspace_cachep __read_mostly; 24 struct kmem_cache *gfs2_inode_cachep __read_mostly; 25 struct kmem_cache *gfs2_bufdata_cachep __read_mostly; 26 struct kmem_cache *gfs2_rgrpd_cachep __read_mostly; 27 struct kmem_cache *gfs2_quotad_cachep __read_mostly; 28 struct kmem_cache *gfs2_rsrv_cachep __read_mostly; 29 mempool_t *gfs2_page_pool __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 int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...) 38 { 39 struct lm_lockstruct *ls = &sdp->sd_lockstruct; 40 const struct lm_lockops *lm = ls->ls_ops; 41 va_list args; 42 43 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW && 44 test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags)) 45 return 0; 46 47 va_start(args, fmt); 48 vprintk(fmt, args); 49 va_end(args); 50 51 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) { 52 fs_err(sdp, "about to withdraw this file system\n"); 53 BUG_ON(sdp->sd_args.ar_debug); 54 55 kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE); 56 57 if (!strcmp(sdp->sd_lockstruct.ls_ops->lm_proto_name, "lock_dlm")) 58 wait_for_completion(&sdp->sd_wdack); 59 60 if (lm->lm_unmount) { 61 fs_err(sdp, "telling LM to unmount\n"); 62 lm->lm_unmount(sdp); 63 } 64 fs_err(sdp, "withdrawn\n"); 65 dump_stack(); 66 } 67 68 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC) 69 panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname); 70 71 return -1; 72 } 73 74 /** 75 * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false 76 * Returns: -1 if this call withdrew the machine, 77 * -2 if it was already withdrawn 78 */ 79 80 int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion, 81 const char *function, char *file, unsigned int line) 82 { 83 int me; 84 me = gfs2_lm_withdraw(sdp, 85 "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n" 86 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 87 sdp->sd_fsname, assertion, 88 sdp->sd_fsname, function, file, line); 89 dump_stack(); 90 return (me) ? -1 : -2; 91 } 92 93 /** 94 * gfs2_assert_warn_i - Print a message to the console if @assertion is false 95 * Returns: -1 if we printed something 96 * -2 if we didn't 97 */ 98 99 int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion, 100 const char *function, char *file, unsigned int line) 101 { 102 if (time_before(jiffies, 103 sdp->sd_last_warning + 104 gfs2_tune_get(sdp, gt_complain_secs) * HZ)) 105 return -2; 106 107 if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) 108 printk(KERN_WARNING 109 "GFS2: fsid=%s: warning: assertion \"%s\" failed\n" 110 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 111 sdp->sd_fsname, assertion, 112 sdp->sd_fsname, function, file, line); 113 114 if (sdp->sd_args.ar_debug) 115 BUG(); 116 else 117 dump_stack(); 118 119 if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC) 120 panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n" 121 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 122 sdp->sd_fsname, assertion, 123 sdp->sd_fsname, function, file, line); 124 125 sdp->sd_last_warning = jiffies; 126 127 return -1; 128 } 129 130 /** 131 * gfs2_consist_i - Flag a filesystem consistency error and withdraw 132 * Returns: -1 if this call withdrew the machine, 133 * 0 if it was already withdrawn 134 */ 135 136 int gfs2_consist_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function, 137 char *file, unsigned int line) 138 { 139 int rv; 140 rv = gfs2_lm_withdraw(sdp, 141 "GFS2: fsid=%s: fatal: filesystem consistency error\n" 142 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 143 sdp->sd_fsname, 144 sdp->sd_fsname, function, file, line); 145 return rv; 146 } 147 148 /** 149 * gfs2_consist_inode_i - Flag an inode consistency error and withdraw 150 * Returns: -1 if this call withdrew the machine, 151 * 0 if it was already withdrawn 152 */ 153 154 int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide, 155 const char *function, char *file, unsigned int line) 156 { 157 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); 158 int rv; 159 rv = gfs2_lm_withdraw(sdp, 160 "GFS2: fsid=%s: fatal: filesystem consistency error\n" 161 "GFS2: fsid=%s: inode = %llu %llu\n" 162 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 163 sdp->sd_fsname, 164 sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino, 165 (unsigned long long)ip->i_no_addr, 166 sdp->sd_fsname, function, file, line); 167 return rv; 168 } 169 170 /** 171 * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw 172 * Returns: -1 if this call withdrew the machine, 173 * 0 if it was already withdrawn 174 */ 175 176 int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide, 177 const char *function, char *file, unsigned int line) 178 { 179 struct gfs2_sbd *sdp = rgd->rd_sbd; 180 int rv; 181 rv = gfs2_lm_withdraw(sdp, 182 "GFS2: fsid=%s: fatal: filesystem consistency error\n" 183 "GFS2: fsid=%s: RG = %llu\n" 184 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 185 sdp->sd_fsname, 186 sdp->sd_fsname, (unsigned long long)rgd->rd_addr, 187 sdp->sd_fsname, function, file, line); 188 return rv; 189 } 190 191 /** 192 * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw 193 * Returns: -1 if this call withdrew the machine, 194 * -2 if it was already withdrawn 195 */ 196 197 int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh, 198 const char *type, const char *function, char *file, 199 unsigned int line) 200 { 201 int me; 202 me = gfs2_lm_withdraw(sdp, 203 "GFS2: fsid=%s: fatal: invalid metadata block\n" 204 "GFS2: fsid=%s: bh = %llu (%s)\n" 205 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 206 sdp->sd_fsname, 207 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, 208 sdp->sd_fsname, function, file, line); 209 return (me) ? -1 : -2; 210 } 211 212 /** 213 * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw 214 * Returns: -1 if this call withdrew the machine, 215 * -2 if it was already withdrawn 216 */ 217 218 int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh, 219 u16 type, u16 t, const char *function, 220 char *file, unsigned int line) 221 { 222 int me; 223 me = gfs2_lm_withdraw(sdp, 224 "GFS2: fsid=%s: fatal: invalid metadata block\n" 225 "GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n" 226 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 227 sdp->sd_fsname, 228 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t, 229 sdp->sd_fsname, function, file, line); 230 return (me) ? -1 : -2; 231 } 232 233 /** 234 * gfs2_io_error_i - Flag an I/O error and withdraw 235 * Returns: -1 if this call withdrew the machine, 236 * 0 if it was already withdrawn 237 */ 238 239 int gfs2_io_error_i(struct gfs2_sbd *sdp, const char *function, char *file, 240 unsigned int line) 241 { 242 int rv; 243 rv = gfs2_lm_withdraw(sdp, 244 "GFS2: fsid=%s: fatal: I/O error\n" 245 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 246 sdp->sd_fsname, 247 sdp->sd_fsname, function, file, line); 248 return rv; 249 } 250 251 /** 252 * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw 253 * Returns: -1 if this call withdrew the machine, 254 * 0 if it was already withdrawn 255 */ 256 257 int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh, 258 const char *function, char *file, unsigned int line) 259 { 260 int rv; 261 rv = gfs2_lm_withdraw(sdp, 262 "GFS2: fsid=%s: fatal: I/O error\n" 263 "GFS2: fsid=%s: block = %llu\n" 264 "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", 265 sdp->sd_fsname, 266 sdp->sd_fsname, (unsigned long long)bh->b_blocknr, 267 sdp->sd_fsname, function, file, line); 268 return rv; 269 } 270 271 void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap, 272 unsigned int bit, int new_value) 273 { 274 unsigned int c, o, b = bit; 275 int old_value; 276 277 c = b / (8 * PAGE_SIZE); 278 b %= 8 * PAGE_SIZE; 279 o = b / 8; 280 b %= 8; 281 282 old_value = (bitmap[c][o] & (1 << b)); 283 gfs2_assert_withdraw(sdp, !old_value != !new_value); 284 285 if (new_value) 286 bitmap[c][o] |= 1 << b; 287 else 288 bitmap[c][o] &= ~(1 << b); 289 } 290 291