| 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 | |
| 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 | int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...) |
| 36 | { |
| 37 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
| 38 | const struct lm_lockops *lm = ls->ls_ops; |
| 39 | va_list args; |
| 40 | |
| 41 | if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW && |
| 42 | test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags)) |
| 43 | return 0; |
| 44 | |
| 45 | va_start(args, fmt); |
| 46 | vprintk(fmt, args); |
| 47 | va_end(args); |
| 48 | |
| 49 | if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) { |
| 50 | fs_err(sdp, "about to withdraw this file system\n"); |
| 51 | BUG_ON(sdp->sd_args.ar_debug); |
| 52 | |
| 53 | kobject_uevent(&sdp->sd_kobj, KOBJ_OFFLINE); |
| 54 | |
| 55 | if (lm->lm_unmount) { |
| 56 | fs_err(sdp, "telling LM to unmount\n"); |
| 57 | lm->lm_unmount(sdp); |
| 58 | } |
| 59 | fs_err(sdp, "withdrawn\n"); |
| 60 | dump_stack(); |
| 61 | } |
| 62 | |
| 63 | if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC) |
| 64 | panic("GFS2: fsid=%s: panic requested.\n", sdp->sd_fsname); |
| 65 | |
| 66 | return -1; |
| 67 | } |
| 68 | |
| 69 | /** |
| 70 | * gfs2_assert_withdraw_i - Cause the machine to withdraw if @assertion is false |
| 71 | * Returns: -1 if this call withdrew the machine, |
| 72 | * -2 if it was already withdrawn |
| 73 | */ |
| 74 | |
| 75 | int gfs2_assert_withdraw_i(struct gfs2_sbd *sdp, char *assertion, |
| 76 | const char *function, char *file, unsigned int line) |
| 77 | { |
| 78 | int me; |
| 79 | me = gfs2_lm_withdraw(sdp, |
| 80 | "GFS2: fsid=%s: fatal: assertion \"%s\" failed\n" |
| 81 | "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", |
| 82 | sdp->sd_fsname, assertion, |
| 83 | sdp->sd_fsname, function, file, line); |
| 84 | dump_stack(); |
| 85 | return (me) ? -1 : -2; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * gfs2_assert_warn_i - Print a message to the console if @assertion is false |
| 90 | * Returns: -1 if we printed something |
| 91 | * -2 if we didn't |
| 92 | */ |
| 93 | |
| 94 | int gfs2_assert_warn_i(struct gfs2_sbd *sdp, char *assertion, |
| 95 | const char *function, char *file, unsigned int line) |
| 96 | { |
| 97 | if (time_before(jiffies, |
| 98 | sdp->sd_last_warning + |
| 99 | gfs2_tune_get(sdp, gt_complain_secs) * HZ)) |
| 100 | return -2; |
| 101 | |
| 102 | if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW) |
| 103 | printk(KERN_WARNING |
| 104 | "GFS2: fsid=%s: warning: assertion \"%s\" failed\n" |
| 105 | "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", |
| 106 | sdp->sd_fsname, assertion, |
| 107 | sdp->sd_fsname, function, file, line); |
| 108 | |
| 109 | if (sdp->sd_args.ar_debug) |
| 110 | BUG(); |
| 111 | else |
| 112 | dump_stack(); |
| 113 | |
| 114 | if (sdp->sd_args.ar_errors == GFS2_ERRORS_PANIC) |
| 115 | panic("GFS2: fsid=%s: warning: assertion \"%s\" failed\n" |
| 116 | "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", |
| 117 | sdp->sd_fsname, assertion, |
| 118 | sdp->sd_fsname, function, file, line); |
| 119 | |
| 120 | sdp->sd_last_warning = jiffies; |
| 121 | |
| 122 | return -1; |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * gfs2_consist_i - Flag a filesystem 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_i(struct gfs2_sbd *sdp, int cluster_wide, const char *function, |
| 132 | char *file, unsigned int line) |
| 133 | { |
| 134 | int rv; |
| 135 | rv = gfs2_lm_withdraw(sdp, |
| 136 | "GFS2: fsid=%s: fatal: filesystem consistency error\n" |
| 137 | "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", |
| 138 | sdp->sd_fsname, |
| 139 | sdp->sd_fsname, function, file, line); |
| 140 | return rv; |
| 141 | } |
| 142 | |
| 143 | /** |
| 144 | * gfs2_consist_inode_i - Flag an inode consistency error and withdraw |
| 145 | * Returns: -1 if this call withdrew the machine, |
| 146 | * 0 if it was already withdrawn |
| 147 | */ |
| 148 | |
| 149 | int gfs2_consist_inode_i(struct gfs2_inode *ip, int cluster_wide, |
| 150 | const char *function, char *file, unsigned int line) |
| 151 | { |
| 152 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
| 153 | int rv; |
| 154 | rv = gfs2_lm_withdraw(sdp, |
| 155 | "GFS2: fsid=%s: fatal: filesystem consistency error\n" |
| 156 | "GFS2: fsid=%s: inode = %llu %llu\n" |
| 157 | "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", |
| 158 | sdp->sd_fsname, |
| 159 | sdp->sd_fsname, (unsigned long long)ip->i_no_formal_ino, |
| 160 | (unsigned long long)ip->i_no_addr, |
| 161 | sdp->sd_fsname, function, file, line); |
| 162 | return rv; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * gfs2_consist_rgrpd_i - Flag a RG consistency error and withdraw |
| 167 | * Returns: -1 if this call withdrew the machine, |
| 168 | * 0 if it was already withdrawn |
| 169 | */ |
| 170 | |
| 171 | int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide, |
| 172 | const char *function, char *file, unsigned int line) |
| 173 | { |
| 174 | struct gfs2_sbd *sdp = rgd->rd_sbd; |
| 175 | int rv; |
| 176 | rv = gfs2_lm_withdraw(sdp, |
| 177 | "GFS2: fsid=%s: fatal: filesystem consistency error\n" |
| 178 | "GFS2: fsid=%s: RG = %llu\n" |
| 179 | "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", |
| 180 | sdp->sd_fsname, |
| 181 | sdp->sd_fsname, (unsigned long long)rgd->rd_addr, |
| 182 | sdp->sd_fsname, function, file, line); |
| 183 | return rv; |
| 184 | } |
| 185 | |
| 186 | /** |
| 187 | * gfs2_meta_check_ii - Flag a magic number consistency error and withdraw |
| 188 | * Returns: -1 if this call withdrew the machine, |
| 189 | * -2 if it was already withdrawn |
| 190 | */ |
| 191 | |
| 192 | int gfs2_meta_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh, |
| 193 | const char *type, const char *function, char *file, |
| 194 | unsigned int line) |
| 195 | { |
| 196 | int me; |
| 197 | me = gfs2_lm_withdraw(sdp, |
| 198 | "GFS2: fsid=%s: fatal: invalid metadata block\n" |
| 199 | "GFS2: fsid=%s: bh = %llu (%s)\n" |
| 200 | "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", |
| 201 | sdp->sd_fsname, |
| 202 | sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, |
| 203 | sdp->sd_fsname, function, file, line); |
| 204 | return (me) ? -1 : -2; |
| 205 | } |
| 206 | |
| 207 | /** |
| 208 | * gfs2_metatype_check_ii - Flag a metadata type consistency error and withdraw |
| 209 | * Returns: -1 if this call withdrew the machine, |
| 210 | * -2 if it was already withdrawn |
| 211 | */ |
| 212 | |
| 213 | int gfs2_metatype_check_ii(struct gfs2_sbd *sdp, struct buffer_head *bh, |
| 214 | u16 type, u16 t, const char *function, |
| 215 | char *file, unsigned int line) |
| 216 | { |
| 217 | int me; |
| 218 | me = gfs2_lm_withdraw(sdp, |
| 219 | "GFS2: fsid=%s: fatal: invalid metadata block\n" |
| 220 | "GFS2: fsid=%s: bh = %llu (type: exp=%u, found=%u)\n" |
| 221 | "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", |
| 222 | sdp->sd_fsname, |
| 223 | sdp->sd_fsname, (unsigned long long)bh->b_blocknr, type, t, |
| 224 | sdp->sd_fsname, function, file, line); |
| 225 | return (me) ? -1 : -2; |
| 226 | } |
| 227 | |
| 228 | /** |
| 229 | * gfs2_io_error_i - Flag an 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_i(struct gfs2_sbd *sdp, const char *function, char *file, |
| 235 | 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: function = %s, file = %s, line = %u\n", |
| 241 | sdp->sd_fsname, |
| 242 | sdp->sd_fsname, function, file, line); |
| 243 | return rv; |
| 244 | } |
| 245 | |
| 246 | /** |
| 247 | * gfs2_io_error_bh_i - Flag a buffer I/O error and withdraw |
| 248 | * Returns: -1 if this call withdrew the machine, |
| 249 | * 0 if it was already withdrawn |
| 250 | */ |
| 251 | |
| 252 | int gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh, |
| 253 | const char *function, char *file, unsigned int line) |
| 254 | { |
| 255 | int rv; |
| 256 | rv = gfs2_lm_withdraw(sdp, |
| 257 | "GFS2: fsid=%s: fatal: I/O error\n" |
| 258 | "GFS2: fsid=%s: block = %llu\n" |
| 259 | "GFS2: fsid=%s: function = %s, file = %s, line = %u\n", |
| 260 | sdp->sd_fsname, |
| 261 | sdp->sd_fsname, (unsigned long long)bh->b_blocknr, |
| 262 | sdp->sd_fsname, function, file, line); |
| 263 | return rv; |
| 264 | } |
| 265 | |
| 266 | void gfs2_icbit_munge(struct gfs2_sbd *sdp, unsigned char **bitmap, |
| 267 | unsigned int bit, int new_value) |
| 268 | { |
| 269 | unsigned int c, o, b = bit; |
| 270 | int old_value; |
| 271 | |
| 272 | c = b / (8 * PAGE_SIZE); |
| 273 | b %= 8 * PAGE_SIZE; |
| 274 | o = b / 8; |
| 275 | b %= 8; |
| 276 | |
| 277 | old_value = (bitmap[c][o] & (1 << b)); |
| 278 | gfs2_assert_withdraw(sdp, !old_value != !new_value); |
| 279 | |
| 280 | if (new_value) |
| 281 | bitmap[c][o] |= 1 << b; |
| 282 | else |
| 283 | bitmap[c][o] &= ~(1 << b); |
| 284 | } |
| 285 | |