Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1 | /* -*- mode: c; c-basic-offset: 8; -*- |
| 2 | * vim: noexpandtab sw=8 ts=8 sts=0: |
| 3 | * |
| 4 | * super.c |
| 5 | * |
| 6 | * load/unload driver, mount/dismount volumes |
| 7 | * |
| 8 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public |
| 12 | * License as published by the Free Software Foundation; either |
| 13 | * version 2 of the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | * General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public |
| 21 | * License along with this program; if not, write to the |
| 22 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | * Boston, MA 021110-1307, USA. |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/fs.h> |
| 28 | #include <linux/types.h> |
| 29 | #include <linux/slab.h> |
| 30 | #include <linux/highmem.h> |
| 31 | #include <linux/utsname.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/random.h> |
| 34 | #include <linux/statfs.h> |
| 35 | #include <linux/moduleparam.h> |
| 36 | #include <linux/blkdev.h> |
| 37 | #include <linux/socket.h> |
| 38 | #include <linux/inet.h> |
| 39 | #include <linux/parser.h> |
| 40 | #include <linux/crc32.h> |
| 41 | #include <linux/debugfs.h> |
| 42 | |
| 43 | #include <cluster/nodemanager.h> |
| 44 | |
| 45 | #define MLOG_MASK_PREFIX ML_SUPER |
| 46 | #include <cluster/masklog.h> |
| 47 | |
| 48 | #include "ocfs2.h" |
| 49 | |
| 50 | /* this should be the only file to include a version 1 header */ |
| 51 | #include "ocfs1_fs_compat.h" |
| 52 | |
| 53 | #include "alloc.h" |
| 54 | #include "dlmglue.h" |
| 55 | #include "export.h" |
| 56 | #include "extent_map.h" |
| 57 | #include "heartbeat.h" |
| 58 | #include "inode.h" |
| 59 | #include "journal.h" |
| 60 | #include "localalloc.h" |
| 61 | #include "namei.h" |
| 62 | #include "slot_map.h" |
| 63 | #include "super.h" |
| 64 | #include "sysfile.h" |
| 65 | #include "uptodate.h" |
| 66 | #include "ver.h" |
| 67 | #include "vote.h" |
| 68 | |
| 69 | #include "buffer_head_io.h" |
| 70 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 71 | static kmem_cache_t *ocfs2_inode_cachep = NULL; |
| 72 | |
| 73 | kmem_cache_t *ocfs2_lock_cache = NULL; |
| 74 | |
| 75 | /* OCFS2 needs to schedule several differnt types of work which |
| 76 | * require cluster locking, disk I/O, recovery waits, etc. Since these |
| 77 | * types of work tend to be heavy we avoid using the kernel events |
| 78 | * workqueue and schedule on our own. */ |
| 79 | struct workqueue_struct *ocfs2_wq = NULL; |
| 80 | |
| 81 | static struct dentry *ocfs2_debugfs_root = NULL; |
| 82 | |
| 83 | MODULE_AUTHOR("Oracle"); |
| 84 | MODULE_LICENSE("GPL"); |
| 85 | |
| 86 | static int ocfs2_parse_options(struct super_block *sb, char *options, |
| 87 | unsigned long *mount_opt, int is_remount); |
| 88 | static void ocfs2_put_super(struct super_block *sb); |
| 89 | static int ocfs2_mount_volume(struct super_block *sb); |
| 90 | static int ocfs2_remount(struct super_block *sb, int *flags, char *data); |
| 91 | static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); |
| 92 | static int ocfs2_initialize_mem_caches(void); |
| 93 | static void ocfs2_free_mem_caches(void); |
| 94 | static void ocfs2_delete_osb(struct ocfs2_super *osb); |
| 95 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 96 | static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 97 | |
| 98 | static int ocfs2_sync_fs(struct super_block *sb, int wait); |
| 99 | |
| 100 | static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); |
| 101 | static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); |
| 102 | static int ocfs2_release_system_inodes(struct ocfs2_super *osb); |
| 103 | static int ocfs2_fill_local_node_info(struct ocfs2_super *osb); |
| 104 | static int ocfs2_check_volume(struct ocfs2_super *osb); |
| 105 | static int ocfs2_verify_volume(struct ocfs2_dinode *di, |
| 106 | struct buffer_head *bh, |
| 107 | u32 sectsize); |
| 108 | static int ocfs2_initialize_super(struct super_block *sb, |
| 109 | struct buffer_head *bh, |
| 110 | int sector_size); |
| 111 | static int ocfs2_get_sector(struct super_block *sb, |
| 112 | struct buffer_head **bh, |
| 113 | int block, |
| 114 | int sect_size); |
| 115 | static void ocfs2_write_super(struct super_block *sb); |
| 116 | static struct inode *ocfs2_alloc_inode(struct super_block *sb); |
| 117 | static void ocfs2_destroy_inode(struct inode *inode); |
| 118 | |
| 119 | static unsigned long long ocfs2_max_file_offset(unsigned int blockshift); |
| 120 | |
| 121 | static struct super_operations ocfs2_sops = { |
| 122 | .statfs = ocfs2_statfs, |
| 123 | .alloc_inode = ocfs2_alloc_inode, |
| 124 | .destroy_inode = ocfs2_destroy_inode, |
| 125 | .drop_inode = ocfs2_drop_inode, |
| 126 | .clear_inode = ocfs2_clear_inode, |
| 127 | .delete_inode = ocfs2_delete_inode, |
| 128 | .sync_fs = ocfs2_sync_fs, |
| 129 | .write_super = ocfs2_write_super, |
| 130 | .put_super = ocfs2_put_super, |
| 131 | .remount_fs = ocfs2_remount, |
| 132 | }; |
| 133 | |
| 134 | enum { |
| 135 | Opt_barrier, |
| 136 | Opt_err_panic, |
| 137 | Opt_err_ro, |
| 138 | Opt_intr, |
| 139 | Opt_nointr, |
| 140 | Opt_hb_none, |
| 141 | Opt_hb_local, |
| 142 | Opt_data_ordered, |
| 143 | Opt_data_writeback, |
| 144 | Opt_err, |
| 145 | }; |
| 146 | |
| 147 | static match_table_t tokens = { |
| 148 | {Opt_barrier, "barrier=%u"}, |
| 149 | {Opt_err_panic, "errors=panic"}, |
| 150 | {Opt_err_ro, "errors=remount-ro"}, |
| 151 | {Opt_intr, "intr"}, |
| 152 | {Opt_nointr, "nointr"}, |
| 153 | {Opt_hb_none, OCFS2_HB_NONE}, |
| 154 | {Opt_hb_local, OCFS2_HB_LOCAL}, |
| 155 | {Opt_data_ordered, "data=ordered"}, |
| 156 | {Opt_data_writeback, "data=writeback"}, |
| 157 | {Opt_err, NULL} |
| 158 | }; |
| 159 | |
| 160 | /* |
| 161 | * write_super and sync_fs ripped right out of ext3. |
| 162 | */ |
| 163 | static void ocfs2_write_super(struct super_block *sb) |
| 164 | { |
Ingo Molnar | 7892f2f | 2006-01-09 15:59:25 -0800 | [diff] [blame] | 165 | if (mutex_trylock(&sb->s_lock) != 0) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 166 | BUG(); |
| 167 | sb->s_dirt = 0; |
| 168 | } |
| 169 | |
| 170 | static int ocfs2_sync_fs(struct super_block *sb, int wait) |
| 171 | { |
| 172 | int status = 0; |
| 173 | tid_t target; |
| 174 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 175 | |
| 176 | sb->s_dirt = 0; |
| 177 | |
| 178 | if (ocfs2_is_hard_readonly(osb)) |
| 179 | return -EROFS; |
| 180 | |
| 181 | if (wait) { |
| 182 | status = ocfs2_flush_truncate_log(osb); |
| 183 | if (status < 0) |
| 184 | mlog_errno(status); |
| 185 | } else { |
| 186 | ocfs2_schedule_truncate_log_flush(osb, 0); |
| 187 | } |
| 188 | |
| 189 | if (journal_start_commit(OCFS2_SB(sb)->journal->j_journal, &target)) { |
| 190 | if (wait) |
| 191 | log_wait_commit(OCFS2_SB(sb)->journal->j_journal, |
| 192 | target); |
| 193 | } |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) |
| 198 | { |
| 199 | struct inode *new = NULL; |
| 200 | int status = 0; |
| 201 | int i; |
| 202 | |
| 203 | mlog_entry_void(); |
| 204 | |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame^] | 205 | new = ocfs2_iget(osb, osb->root_blkno, OCFS2_FI_FLAG_SYSFILE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 206 | if (IS_ERR(new)) { |
| 207 | status = PTR_ERR(new); |
| 208 | mlog_errno(status); |
| 209 | goto bail; |
| 210 | } |
| 211 | osb->root_inode = new; |
| 212 | |
Mark Fasheh | 24c19ef | 2006-09-22 17:28:19 -0700 | [diff] [blame^] | 213 | new = ocfs2_iget(osb, osb->system_dir_blkno, OCFS2_FI_FLAG_SYSFILE); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 214 | if (IS_ERR(new)) { |
| 215 | status = PTR_ERR(new); |
| 216 | mlog_errno(status); |
| 217 | goto bail; |
| 218 | } |
| 219 | osb->sys_root_inode = new; |
| 220 | |
| 221 | for (i = OCFS2_FIRST_ONLINE_SYSTEM_INODE; |
| 222 | i <= OCFS2_LAST_GLOBAL_SYSTEM_INODE; i++) { |
| 223 | new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); |
| 224 | if (!new) { |
| 225 | ocfs2_release_system_inodes(osb); |
| 226 | status = -EINVAL; |
| 227 | mlog_errno(status); |
| 228 | /* FIXME: Should ERROR_RO_FS */ |
| 229 | mlog(ML_ERROR, "Unable to load system inode %d, " |
| 230 | "possibly corrupt fs?", i); |
| 231 | goto bail; |
| 232 | } |
| 233 | // the array now has one ref, so drop this one |
| 234 | iput(new); |
| 235 | } |
| 236 | |
| 237 | bail: |
| 238 | mlog_exit(status); |
| 239 | return status; |
| 240 | } |
| 241 | |
| 242 | static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) |
| 243 | { |
| 244 | struct inode *new = NULL; |
| 245 | int status = 0; |
| 246 | int i; |
| 247 | |
| 248 | mlog_entry_void(); |
| 249 | |
| 250 | for (i = OCFS2_LAST_GLOBAL_SYSTEM_INODE + 1; |
| 251 | i < NUM_SYSTEM_INODES; |
| 252 | i++) { |
| 253 | new = ocfs2_get_system_file_inode(osb, i, osb->slot_num); |
| 254 | if (!new) { |
| 255 | ocfs2_release_system_inodes(osb); |
| 256 | status = -EINVAL; |
| 257 | mlog(ML_ERROR, "status=%d, sysfile=%d, slot=%d\n", |
| 258 | status, i, osb->slot_num); |
| 259 | goto bail; |
| 260 | } |
| 261 | /* the array now has one ref, so drop this one */ |
| 262 | iput(new); |
| 263 | } |
| 264 | |
| 265 | bail: |
| 266 | mlog_exit(status); |
| 267 | return status; |
| 268 | } |
| 269 | |
| 270 | static int ocfs2_release_system_inodes(struct ocfs2_super *osb) |
| 271 | { |
| 272 | int status = 0, i; |
| 273 | struct inode *inode; |
| 274 | |
| 275 | mlog_entry_void(); |
| 276 | |
| 277 | for (i = 0; i < NUM_SYSTEM_INODES; i++) { |
| 278 | inode = osb->system_inodes[i]; |
| 279 | if (inode) { |
| 280 | iput(inode); |
| 281 | osb->system_inodes[i] = NULL; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | inode = osb->sys_root_inode; |
| 286 | if (inode) { |
| 287 | iput(inode); |
| 288 | osb->sys_root_inode = NULL; |
| 289 | } |
| 290 | |
| 291 | inode = osb->root_inode; |
| 292 | if (inode) { |
| 293 | iput(inode); |
| 294 | osb->root_inode = NULL; |
| 295 | } |
| 296 | |
| 297 | mlog_exit(status); |
| 298 | return status; |
| 299 | } |
| 300 | |
| 301 | /* We're allocating fs objects, use GFP_NOFS */ |
| 302 | static struct inode *ocfs2_alloc_inode(struct super_block *sb) |
| 303 | { |
| 304 | struct ocfs2_inode_info *oi; |
| 305 | |
| 306 | oi = kmem_cache_alloc(ocfs2_inode_cachep, SLAB_NOFS); |
| 307 | if (!oi) |
| 308 | return NULL; |
| 309 | |
| 310 | return &oi->vfs_inode; |
| 311 | } |
| 312 | |
| 313 | static void ocfs2_destroy_inode(struct inode *inode) |
| 314 | { |
| 315 | kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode)); |
| 316 | } |
| 317 | |
| 318 | /* From xfs_super.c:xfs_max_file_offset |
| 319 | * Copyright (c) 2000-2004 Silicon Graphics, Inc. |
| 320 | */ |
| 321 | static unsigned long long ocfs2_max_file_offset(unsigned int blockshift) |
| 322 | { |
| 323 | unsigned int pagefactor = 1; |
| 324 | unsigned int bitshift = BITS_PER_LONG - 1; |
| 325 | |
| 326 | /* Figure out maximum filesize, on Linux this can depend on |
| 327 | * the filesystem blocksize (on 32 bit platforms). |
| 328 | * __block_prepare_write does this in an [unsigned] long... |
| 329 | * page->index << (PAGE_CACHE_SHIFT - bbits) |
| 330 | * So, for page sized blocks (4K on 32 bit platforms), |
| 331 | * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is |
| 332 | * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) |
| 333 | * but for smaller blocksizes it is less (bbits = log2 bsize). |
| 334 | * Note1: get_block_t takes a long (implicit cast from above) |
| 335 | * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch |
| 336 | * can optionally convert the [unsigned] long from above into |
| 337 | * an [unsigned] long long. |
| 338 | */ |
| 339 | |
| 340 | #if BITS_PER_LONG == 32 |
| 341 | # if defined(CONFIG_LBD) |
| 342 | BUG_ON(sizeof(sector_t) != 8); |
| 343 | pagefactor = PAGE_CACHE_SIZE; |
| 344 | bitshift = BITS_PER_LONG; |
| 345 | # else |
| 346 | pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); |
| 347 | # endif |
| 348 | #endif |
| 349 | |
| 350 | return (((unsigned long long)pagefactor) << bitshift) - 1; |
| 351 | } |
| 352 | |
| 353 | static int ocfs2_remount(struct super_block *sb, int *flags, char *data) |
| 354 | { |
| 355 | int incompat_features; |
| 356 | int ret = 0; |
| 357 | unsigned long parsed_options; |
| 358 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 359 | |
| 360 | if (!ocfs2_parse_options(sb, data, &parsed_options, 1)) { |
| 361 | ret = -EINVAL; |
| 362 | goto out; |
| 363 | } |
| 364 | |
| 365 | if ((osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) != |
| 366 | (parsed_options & OCFS2_MOUNT_HB_LOCAL)) { |
| 367 | ret = -EINVAL; |
| 368 | mlog(ML_ERROR, "Cannot change heartbeat mode on remount\n"); |
| 369 | goto out; |
| 370 | } |
| 371 | |
| 372 | if ((osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK) != |
| 373 | (parsed_options & OCFS2_MOUNT_DATA_WRITEBACK)) { |
| 374 | ret = -EINVAL; |
| 375 | mlog(ML_ERROR, "Cannot change data mode on remount\n"); |
| 376 | goto out; |
| 377 | } |
| 378 | |
| 379 | /* We're going to/from readonly mode. */ |
| 380 | if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { |
| 381 | /* Lock here so the check of HARD_RO and the potential |
| 382 | * setting of SOFT_RO is atomic. */ |
| 383 | spin_lock(&osb->osb_lock); |
| 384 | if (osb->osb_flags & OCFS2_OSB_HARD_RO) { |
| 385 | mlog(ML_ERROR, "Remount on readonly device is forbidden.\n"); |
| 386 | ret = -EROFS; |
| 387 | goto unlock_osb; |
| 388 | } |
| 389 | |
| 390 | if (*flags & MS_RDONLY) { |
| 391 | mlog(0, "Going to ro mode.\n"); |
| 392 | sb->s_flags |= MS_RDONLY; |
| 393 | osb->osb_flags |= OCFS2_OSB_SOFT_RO; |
| 394 | } else { |
| 395 | mlog(0, "Making ro filesystem writeable.\n"); |
| 396 | |
| 397 | if (osb->osb_flags & OCFS2_OSB_ERROR_FS) { |
| 398 | mlog(ML_ERROR, "Cannot remount RDWR " |
| 399 | "filesystem due to previous errors.\n"); |
| 400 | ret = -EROFS; |
| 401 | goto unlock_osb; |
| 402 | } |
| 403 | incompat_features = OCFS2_HAS_RO_COMPAT_FEATURE(sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP); |
| 404 | if (incompat_features) { |
| 405 | mlog(ML_ERROR, "Cannot remount RDWR because " |
| 406 | "of unsupported optional features " |
| 407 | "(%x).\n", incompat_features); |
| 408 | ret = -EINVAL; |
| 409 | goto unlock_osb; |
| 410 | } |
| 411 | sb->s_flags &= ~MS_RDONLY; |
| 412 | osb->osb_flags &= ~OCFS2_OSB_SOFT_RO; |
| 413 | } |
| 414 | unlock_osb: |
| 415 | spin_unlock(&osb->osb_lock); |
| 416 | } |
| 417 | |
| 418 | if (!ret) { |
| 419 | if (!ocfs2_is_hard_readonly(osb)) |
| 420 | ocfs2_set_journal_params(osb); |
| 421 | |
| 422 | /* Only save off the new mount options in case of a successful |
| 423 | * remount. */ |
| 424 | osb->s_mount_opt = parsed_options; |
| 425 | } |
| 426 | out: |
| 427 | return ret; |
| 428 | } |
| 429 | |
| 430 | static int ocfs2_sb_probe(struct super_block *sb, |
| 431 | struct buffer_head **bh, |
| 432 | int *sector_size) |
| 433 | { |
| 434 | int status = 0, tmpstat; |
| 435 | struct ocfs1_vol_disk_hdr *hdr; |
| 436 | struct ocfs2_dinode *di; |
| 437 | int blksize; |
| 438 | |
| 439 | *bh = NULL; |
| 440 | |
| 441 | /* may be > 512 */ |
| 442 | *sector_size = bdev_hardsect_size(sb->s_bdev); |
| 443 | if (*sector_size > OCFS2_MAX_BLOCKSIZE) { |
| 444 | mlog(ML_ERROR, "Hardware sector size too large: %d (max=%d)\n", |
| 445 | *sector_size, OCFS2_MAX_BLOCKSIZE); |
| 446 | status = -EINVAL; |
| 447 | goto bail; |
| 448 | } |
| 449 | |
| 450 | /* Can this really happen? */ |
| 451 | if (*sector_size < OCFS2_MIN_BLOCKSIZE) |
| 452 | *sector_size = OCFS2_MIN_BLOCKSIZE; |
| 453 | |
| 454 | /* check block zero for old format */ |
| 455 | status = ocfs2_get_sector(sb, bh, 0, *sector_size); |
| 456 | if (status < 0) { |
| 457 | mlog_errno(status); |
| 458 | goto bail; |
| 459 | } |
| 460 | hdr = (struct ocfs1_vol_disk_hdr *) (*bh)->b_data; |
| 461 | if (hdr->major_version == OCFS1_MAJOR_VERSION) { |
| 462 | mlog(ML_ERROR, "incompatible version: %u.%u\n", |
| 463 | hdr->major_version, hdr->minor_version); |
| 464 | status = -EINVAL; |
| 465 | } |
| 466 | if (memcmp(hdr->signature, OCFS1_VOLUME_SIGNATURE, |
| 467 | strlen(OCFS1_VOLUME_SIGNATURE)) == 0) { |
| 468 | mlog(ML_ERROR, "incompatible volume signature: %8s\n", |
| 469 | hdr->signature); |
| 470 | status = -EINVAL; |
| 471 | } |
| 472 | brelse(*bh); |
| 473 | *bh = NULL; |
| 474 | if (status < 0) { |
| 475 | mlog(ML_ERROR, "This is an ocfs v1 filesystem which must be " |
| 476 | "upgraded before mounting with ocfs v2\n"); |
| 477 | goto bail; |
| 478 | } |
| 479 | |
| 480 | /* |
| 481 | * Now check at magic offset for 512, 1024, 2048, 4096 |
| 482 | * blocksizes. 4096 is the maximum blocksize because it is |
| 483 | * the minimum clustersize. |
| 484 | */ |
| 485 | status = -EINVAL; |
| 486 | for (blksize = *sector_size; |
| 487 | blksize <= OCFS2_MAX_BLOCKSIZE; |
| 488 | blksize <<= 1) { |
| 489 | tmpstat = ocfs2_get_sector(sb, bh, |
| 490 | OCFS2_SUPER_BLOCK_BLKNO, |
| 491 | blksize); |
| 492 | if (tmpstat < 0) { |
| 493 | status = tmpstat; |
| 494 | mlog_errno(status); |
| 495 | goto bail; |
| 496 | } |
| 497 | di = (struct ocfs2_dinode *) (*bh)->b_data; |
| 498 | status = ocfs2_verify_volume(di, *bh, blksize); |
| 499 | if (status >= 0) |
| 500 | goto bail; |
| 501 | brelse(*bh); |
| 502 | *bh = NULL; |
| 503 | if (status != -EAGAIN) |
| 504 | break; |
| 505 | } |
| 506 | |
| 507 | bail: |
| 508 | return status; |
| 509 | } |
| 510 | |
| 511 | static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) |
| 512 | { |
| 513 | struct dentry *root; |
| 514 | int status, sector_size; |
| 515 | unsigned long parsed_opt; |
| 516 | struct inode *inode = NULL; |
| 517 | struct ocfs2_super *osb = NULL; |
| 518 | struct buffer_head *bh = NULL; |
| 519 | |
| 520 | mlog_entry("%p, %p, %i", sb, data, silent); |
| 521 | |
| 522 | /* for now we only have one cluster/node, make sure we see it |
| 523 | * in the heartbeat universe */ |
| 524 | if (!o2hb_check_local_node_heartbeating()) { |
| 525 | status = -EINVAL; |
| 526 | goto read_super_error; |
| 527 | } |
| 528 | |
| 529 | /* probe for superblock */ |
| 530 | status = ocfs2_sb_probe(sb, &bh, §or_size); |
| 531 | if (status < 0) { |
| 532 | mlog(ML_ERROR, "superblock probe failed!\n"); |
| 533 | goto read_super_error; |
| 534 | } |
| 535 | |
| 536 | status = ocfs2_initialize_super(sb, bh, sector_size); |
| 537 | osb = OCFS2_SB(sb); |
| 538 | if (status < 0) { |
| 539 | mlog_errno(status); |
| 540 | goto read_super_error; |
| 541 | } |
| 542 | brelse(bh); |
| 543 | bh = NULL; |
| 544 | |
| 545 | if (!ocfs2_parse_options(sb, data, &parsed_opt, 0)) { |
| 546 | status = -EINVAL; |
| 547 | goto read_super_error; |
| 548 | } |
| 549 | osb->s_mount_opt = parsed_opt; |
| 550 | |
| 551 | sb->s_magic = OCFS2_SUPER_MAGIC; |
| 552 | |
| 553 | /* Hard readonly mode only if: bdev_read_only, MS_RDONLY, |
| 554 | * heartbeat=none */ |
| 555 | if (bdev_read_only(sb->s_bdev)) { |
| 556 | if (!(sb->s_flags & MS_RDONLY)) { |
| 557 | status = -EACCES; |
| 558 | mlog(ML_ERROR, "Readonly device detected but readonly " |
| 559 | "mount was not specified.\n"); |
| 560 | goto read_super_error; |
| 561 | } |
| 562 | |
| 563 | /* You should not be able to start a local heartbeat |
| 564 | * on a readonly device. */ |
| 565 | if (osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL) { |
| 566 | status = -EROFS; |
| 567 | mlog(ML_ERROR, "Local heartbeat specified on readonly " |
| 568 | "device.\n"); |
| 569 | goto read_super_error; |
| 570 | } |
| 571 | |
| 572 | status = ocfs2_check_journals_nolocks(osb); |
| 573 | if (status < 0) { |
| 574 | if (status == -EROFS) |
| 575 | mlog(ML_ERROR, "Recovery required on readonly " |
| 576 | "file system, but write access is " |
| 577 | "unavailable.\n"); |
| 578 | else |
| 579 | mlog_errno(status); |
| 580 | goto read_super_error; |
| 581 | } |
| 582 | |
| 583 | ocfs2_set_ro_flag(osb, 1); |
| 584 | |
| 585 | printk(KERN_NOTICE "Readonly device detected. No cluster " |
| 586 | "services will be utilized for this mount. Recovery " |
| 587 | "will be skipped.\n"); |
| 588 | } |
| 589 | |
| 590 | if (!ocfs2_is_hard_readonly(osb)) { |
| 591 | /* If this isn't a hard readonly mount, then we need |
| 592 | * to make sure that heartbeat is in a valid state, |
| 593 | * and that we mark ourselves soft readonly is -oro |
| 594 | * was specified. */ |
| 595 | if (!(osb->s_mount_opt & OCFS2_MOUNT_HB_LOCAL)) { |
| 596 | mlog(ML_ERROR, "No heartbeat for device (%s)\n", |
| 597 | sb->s_id); |
| 598 | status = -EINVAL; |
| 599 | goto read_super_error; |
| 600 | } |
| 601 | |
| 602 | if (sb->s_flags & MS_RDONLY) |
| 603 | ocfs2_set_ro_flag(osb, 0); |
| 604 | } |
| 605 | |
| 606 | osb->osb_debug_root = debugfs_create_dir(osb->uuid_str, |
| 607 | ocfs2_debugfs_root); |
| 608 | if (!osb->osb_debug_root) { |
| 609 | status = -EINVAL; |
| 610 | mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n"); |
| 611 | goto read_super_error; |
| 612 | } |
| 613 | |
| 614 | status = ocfs2_mount_volume(sb); |
| 615 | if (osb->root_inode) |
| 616 | inode = igrab(osb->root_inode); |
| 617 | |
| 618 | if (status < 0) |
| 619 | goto read_super_error; |
| 620 | |
| 621 | if (!inode) { |
| 622 | status = -EIO; |
| 623 | mlog_errno(status); |
| 624 | goto read_super_error; |
| 625 | } |
| 626 | |
| 627 | root = d_alloc_root(inode); |
| 628 | if (!root) { |
| 629 | status = -ENOMEM; |
| 630 | mlog_errno(status); |
| 631 | goto read_super_error; |
| 632 | } |
| 633 | |
| 634 | sb->s_root = root; |
| 635 | |
| 636 | ocfs2_complete_mount_recovery(osb); |
| 637 | |
Sunil Mushran | 781ee3e | 2006-04-27 16:41:31 -0700 | [diff] [blame] | 638 | printk(KERN_INFO "ocfs2: Mounting device (%s) on (node %d, slot %d) " |
| 639 | "with %s data mode.\n", |
| 640 | osb->dev_str, osb->node_num, osb->slot_num, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 641 | osb->s_mount_opt & OCFS2_MOUNT_DATA_WRITEBACK ? "writeback" : |
| 642 | "ordered"); |
| 643 | |
| 644 | atomic_set(&osb->vol_state, VOLUME_MOUNTED); |
| 645 | wake_up(&osb->osb_mount_event); |
| 646 | |
| 647 | mlog_exit(status); |
| 648 | return status; |
| 649 | |
| 650 | read_super_error: |
| 651 | if (bh != NULL) |
| 652 | brelse(bh); |
| 653 | |
| 654 | if (inode) |
| 655 | iput(inode); |
| 656 | |
| 657 | if (osb) { |
| 658 | atomic_set(&osb->vol_state, VOLUME_DISABLED); |
| 659 | wake_up(&osb->osb_mount_event); |
| 660 | ocfs2_dismount_volume(sb, 1); |
| 661 | } |
| 662 | |
| 663 | mlog_exit(status); |
| 664 | return status; |
| 665 | } |
| 666 | |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 667 | static int ocfs2_get_sb(struct file_system_type *fs_type, |
| 668 | int flags, |
| 669 | const char *dev_name, |
| 670 | void *data, |
| 671 | struct vfsmount *mnt) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 672 | { |
David Howells | 454e239 | 2006-06-23 02:02:57 -0700 | [diff] [blame] | 673 | return get_sb_bdev(fs_type, flags, dev_name, data, ocfs2_fill_super, |
| 674 | mnt); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 675 | } |
| 676 | |
| 677 | static struct file_system_type ocfs2_fs_type = { |
| 678 | .owner = THIS_MODULE, |
| 679 | .name = "ocfs2", |
| 680 | .get_sb = ocfs2_get_sb, /* is this called when we mount |
| 681 | * the fs? */ |
| 682 | .kill_sb = kill_block_super, /* set to the generic one |
| 683 | * right now, but do we |
| 684 | * need to change that? */ |
Mark Fasheh | 1ba9da2 | 2006-09-08 14:22:54 -0700 | [diff] [blame] | 685 | .fs_flags = FS_REQUIRES_DEV|FS_RENAME_DOES_D_MOVE, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 686 | .next = NULL |
| 687 | }; |
| 688 | |
| 689 | static int ocfs2_parse_options(struct super_block *sb, |
| 690 | char *options, |
| 691 | unsigned long *mount_opt, |
| 692 | int is_remount) |
| 693 | { |
| 694 | int status; |
| 695 | char *p; |
| 696 | |
| 697 | mlog_entry("remount: %d, options: \"%s\"\n", is_remount, |
| 698 | options ? options : "(none)"); |
| 699 | |
| 700 | *mount_opt = 0; |
| 701 | |
| 702 | if (!options) { |
| 703 | status = 1; |
| 704 | goto bail; |
| 705 | } |
| 706 | |
| 707 | while ((p = strsep(&options, ",")) != NULL) { |
| 708 | int token, option; |
| 709 | substring_t args[MAX_OPT_ARGS]; |
| 710 | |
| 711 | if (!*p) |
| 712 | continue; |
| 713 | |
| 714 | token = match_token(p, tokens, args); |
| 715 | switch (token) { |
| 716 | case Opt_hb_local: |
| 717 | *mount_opt |= OCFS2_MOUNT_HB_LOCAL; |
| 718 | break; |
| 719 | case Opt_hb_none: |
| 720 | *mount_opt &= ~OCFS2_MOUNT_HB_LOCAL; |
| 721 | break; |
| 722 | case Opt_barrier: |
| 723 | if (match_int(&args[0], &option)) { |
| 724 | status = 0; |
| 725 | goto bail; |
| 726 | } |
| 727 | if (option) |
| 728 | *mount_opt |= OCFS2_MOUNT_BARRIER; |
| 729 | else |
| 730 | *mount_opt &= ~OCFS2_MOUNT_BARRIER; |
| 731 | break; |
| 732 | case Opt_intr: |
| 733 | *mount_opt &= ~OCFS2_MOUNT_NOINTR; |
| 734 | break; |
| 735 | case Opt_nointr: |
| 736 | *mount_opt |= OCFS2_MOUNT_NOINTR; |
| 737 | break; |
| 738 | case Opt_err_panic: |
| 739 | *mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; |
| 740 | break; |
| 741 | case Opt_err_ro: |
| 742 | *mount_opt &= ~OCFS2_MOUNT_ERRORS_PANIC; |
| 743 | break; |
| 744 | case Opt_data_ordered: |
| 745 | *mount_opt &= ~OCFS2_MOUNT_DATA_WRITEBACK; |
| 746 | break; |
| 747 | case Opt_data_writeback: |
| 748 | *mount_opt |= OCFS2_MOUNT_DATA_WRITEBACK; |
| 749 | break; |
| 750 | default: |
| 751 | mlog(ML_ERROR, |
| 752 | "Unrecognized mount option \"%s\" " |
| 753 | "or missing value\n", p); |
| 754 | status = 0; |
| 755 | goto bail; |
| 756 | } |
| 757 | } |
| 758 | |
| 759 | status = 1; |
| 760 | |
| 761 | bail: |
| 762 | mlog_exit(status); |
| 763 | return status; |
| 764 | } |
| 765 | |
| 766 | static int __init ocfs2_init(void) |
| 767 | { |
| 768 | int status; |
| 769 | |
| 770 | mlog_entry_void(); |
| 771 | |
| 772 | ocfs2_print_version(); |
| 773 | |
| 774 | if (init_ocfs2_extent_maps()) |
| 775 | return -ENOMEM; |
| 776 | |
| 777 | status = init_ocfs2_uptodate_cache(); |
| 778 | if (status < 0) { |
| 779 | mlog_errno(status); |
| 780 | goto leave; |
| 781 | } |
| 782 | |
| 783 | status = ocfs2_initialize_mem_caches(); |
| 784 | if (status < 0) { |
| 785 | mlog_errno(status); |
| 786 | goto leave; |
| 787 | } |
| 788 | |
| 789 | ocfs2_wq = create_singlethread_workqueue("ocfs2_wq"); |
| 790 | if (!ocfs2_wq) { |
| 791 | status = -ENOMEM; |
| 792 | goto leave; |
| 793 | } |
| 794 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 795 | ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL); |
| 796 | if (!ocfs2_debugfs_root) { |
| 797 | status = -EFAULT; |
| 798 | mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n"); |
| 799 | } |
| 800 | |
| 801 | leave: |
| 802 | if (status < 0) { |
| 803 | ocfs2_free_mem_caches(); |
| 804 | exit_ocfs2_uptodate_cache(); |
| 805 | exit_ocfs2_extent_maps(); |
| 806 | } |
| 807 | |
| 808 | mlog_exit(status); |
| 809 | |
| 810 | if (status >= 0) { |
| 811 | return register_filesystem(&ocfs2_fs_type); |
| 812 | } else |
| 813 | return -1; |
| 814 | } |
| 815 | |
| 816 | static void __exit ocfs2_exit(void) |
| 817 | { |
| 818 | mlog_entry_void(); |
| 819 | |
| 820 | if (ocfs2_wq) { |
| 821 | flush_workqueue(ocfs2_wq); |
| 822 | destroy_workqueue(ocfs2_wq); |
| 823 | } |
| 824 | |
| 825 | debugfs_remove(ocfs2_debugfs_root); |
| 826 | |
| 827 | ocfs2_free_mem_caches(); |
| 828 | |
| 829 | unregister_filesystem(&ocfs2_fs_type); |
| 830 | |
| 831 | exit_ocfs2_extent_maps(); |
| 832 | |
| 833 | exit_ocfs2_uptodate_cache(); |
| 834 | |
| 835 | mlog_exit_void(); |
| 836 | } |
| 837 | |
| 838 | static void ocfs2_put_super(struct super_block *sb) |
| 839 | { |
| 840 | mlog_entry("(0x%p)\n", sb); |
| 841 | |
| 842 | ocfs2_sync_blockdev(sb); |
| 843 | ocfs2_dismount_volume(sb, 0); |
| 844 | |
| 845 | mlog_exit_void(); |
| 846 | } |
| 847 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 848 | static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 849 | { |
| 850 | struct ocfs2_super *osb; |
| 851 | u32 numbits, freebits; |
| 852 | int status; |
| 853 | struct ocfs2_dinode *bm_lock; |
| 854 | struct buffer_head *bh = NULL; |
| 855 | struct inode *inode = NULL; |
| 856 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 857 | mlog_entry("(%p, %p)\n", dentry->d_sb, buf); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 858 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 859 | osb = OCFS2_SB(dentry->d_sb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 860 | |
| 861 | inode = ocfs2_get_system_file_inode(osb, |
| 862 | GLOBAL_BITMAP_SYSTEM_INODE, |
| 863 | OCFS2_INVALID_SLOT); |
| 864 | if (!inode) { |
| 865 | mlog(ML_ERROR, "failed to get bitmap inode\n"); |
| 866 | status = -EIO; |
| 867 | goto bail; |
| 868 | } |
| 869 | |
| 870 | status = ocfs2_meta_lock(inode, NULL, &bh, 0); |
| 871 | if (status < 0) { |
| 872 | mlog_errno(status); |
| 873 | goto bail; |
| 874 | } |
| 875 | |
| 876 | bm_lock = (struct ocfs2_dinode *) bh->b_data; |
| 877 | |
| 878 | numbits = le32_to_cpu(bm_lock->id1.bitmap1.i_total); |
| 879 | freebits = numbits - le32_to_cpu(bm_lock->id1.bitmap1.i_used); |
| 880 | |
| 881 | buf->f_type = OCFS2_SUPER_MAGIC; |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 882 | buf->f_bsize = dentry->d_sb->s_blocksize; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 883 | buf->f_namelen = OCFS2_MAX_FILENAME_LEN; |
| 884 | buf->f_blocks = ((sector_t) numbits) * |
| 885 | (osb->s_clustersize >> osb->sb->s_blocksize_bits); |
| 886 | buf->f_bfree = ((sector_t) freebits) * |
| 887 | (osb->s_clustersize >> osb->sb->s_blocksize_bits); |
| 888 | buf->f_bavail = buf->f_bfree; |
| 889 | buf->f_files = numbits; |
| 890 | buf->f_ffree = freebits; |
| 891 | |
| 892 | brelse(bh); |
| 893 | |
| 894 | ocfs2_meta_unlock(inode, 0); |
| 895 | status = 0; |
| 896 | bail: |
| 897 | if (inode) |
| 898 | iput(inode); |
| 899 | |
| 900 | mlog_exit(status); |
| 901 | |
| 902 | return status; |
| 903 | } |
| 904 | |
| 905 | static void ocfs2_inode_init_once(void *data, |
| 906 | kmem_cache_t *cachep, |
| 907 | unsigned long flags) |
| 908 | { |
| 909 | struct ocfs2_inode_info *oi = data; |
| 910 | |
| 911 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == |
| 912 | SLAB_CTOR_CONSTRUCTOR) { |
| 913 | oi->ip_flags = 0; |
| 914 | oi->ip_open_count = 0; |
| 915 | spin_lock_init(&oi->ip_lock); |
| 916 | ocfs2_extent_map_init(&oi->vfs_inode); |
| 917 | INIT_LIST_HEAD(&oi->ip_handle_list); |
| 918 | INIT_LIST_HEAD(&oi->ip_io_markers); |
| 919 | oi->ip_handle = NULL; |
| 920 | oi->ip_created_trans = 0; |
| 921 | oi->ip_last_trans = 0; |
| 922 | oi->ip_dir_start_lookup = 0; |
| 923 | |
| 924 | init_rwsem(&oi->ip_alloc_sem); |
Mark Fasheh | 251b6ec | 2006-01-10 15:41:43 -0800 | [diff] [blame] | 925 | mutex_init(&oi->ip_io_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 926 | |
| 927 | oi->ip_blkno = 0ULL; |
| 928 | oi->ip_clusters = 0; |
| 929 | |
| 930 | ocfs2_lock_res_init_once(&oi->ip_rw_lockres); |
| 931 | ocfs2_lock_res_init_once(&oi->ip_meta_lockres); |
| 932 | ocfs2_lock_res_init_once(&oi->ip_data_lockres); |
| 933 | |
| 934 | ocfs2_metadata_cache_init(&oi->vfs_inode); |
| 935 | |
| 936 | inode_init_once(&oi->vfs_inode); |
| 937 | } |
| 938 | } |
| 939 | |
| 940 | static int ocfs2_initialize_mem_caches(void) |
| 941 | { |
| 942 | ocfs2_inode_cachep = kmem_cache_create("ocfs2_inode_cache", |
Paul Jackson | fffb60f | 2006-03-24 03:16:06 -0800 | [diff] [blame] | 943 | sizeof(struct ocfs2_inode_info), |
| 944 | 0, |
| 945 | (SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT| |
| 946 | SLAB_MEM_SPREAD), |
| 947 | ocfs2_inode_init_once, NULL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 948 | if (!ocfs2_inode_cachep) |
| 949 | return -ENOMEM; |
| 950 | |
| 951 | ocfs2_lock_cache = kmem_cache_create("ocfs2_lock", |
| 952 | sizeof(struct ocfs2_journal_lock), |
| 953 | 0, |
Christoph Lameter | ac2b898 | 2006-03-22 00:08:15 -0800 | [diff] [blame] | 954 | SLAB_HWCACHE_ALIGN, |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 955 | NULL, NULL); |
| 956 | if (!ocfs2_lock_cache) |
| 957 | return -ENOMEM; |
| 958 | |
| 959 | return 0; |
| 960 | } |
| 961 | |
| 962 | static void ocfs2_free_mem_caches(void) |
| 963 | { |
| 964 | if (ocfs2_inode_cachep) |
| 965 | kmem_cache_destroy(ocfs2_inode_cachep); |
| 966 | if (ocfs2_lock_cache) |
| 967 | kmem_cache_destroy(ocfs2_lock_cache); |
| 968 | |
| 969 | ocfs2_inode_cachep = NULL; |
| 970 | ocfs2_lock_cache = NULL; |
| 971 | } |
| 972 | |
| 973 | static int ocfs2_get_sector(struct super_block *sb, |
| 974 | struct buffer_head **bh, |
| 975 | int block, |
| 976 | int sect_size) |
| 977 | { |
| 978 | if (!sb_set_blocksize(sb, sect_size)) { |
| 979 | mlog(ML_ERROR, "unable to set blocksize\n"); |
| 980 | return -EIO; |
| 981 | } |
| 982 | |
| 983 | *bh = sb_getblk(sb, block); |
| 984 | if (!*bh) { |
| 985 | mlog_errno(-EIO); |
| 986 | return -EIO; |
| 987 | } |
| 988 | lock_buffer(*bh); |
| 989 | if (!buffer_dirty(*bh)) |
| 990 | clear_buffer_uptodate(*bh); |
| 991 | unlock_buffer(*bh); |
| 992 | ll_rw_block(READ, 1, bh); |
| 993 | wait_on_buffer(*bh); |
| 994 | return 0; |
| 995 | } |
| 996 | |
| 997 | /* ocfs2 1.0 only allows one cluster and node identity per kernel image. */ |
| 998 | static int ocfs2_fill_local_node_info(struct ocfs2_super *osb) |
| 999 | { |
| 1000 | int status; |
| 1001 | |
| 1002 | /* XXX hold a ref on the node while mounte? easy enough, if |
| 1003 | * desirable. */ |
| 1004 | osb->node_num = o2nm_this_node(); |
| 1005 | if (osb->node_num == O2NM_MAX_NODES) { |
| 1006 | mlog(ML_ERROR, "could not find this host's node number\n"); |
| 1007 | status = -ENOENT; |
| 1008 | goto bail; |
| 1009 | } |
| 1010 | |
Sunil Mushran | 781ee3e | 2006-04-27 16:41:31 -0700 | [diff] [blame] | 1011 | mlog(0, "I am node %d\n", osb->node_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1012 | |
| 1013 | status = 0; |
| 1014 | bail: |
| 1015 | return status; |
| 1016 | } |
| 1017 | |
| 1018 | static int ocfs2_mount_volume(struct super_block *sb) |
| 1019 | { |
| 1020 | int status = 0; |
| 1021 | int unlock_super = 0; |
| 1022 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 1023 | |
| 1024 | mlog_entry_void(); |
| 1025 | |
| 1026 | if (ocfs2_is_hard_readonly(osb)) |
| 1027 | goto leave; |
| 1028 | |
| 1029 | status = ocfs2_fill_local_node_info(osb); |
| 1030 | if (status < 0) { |
| 1031 | mlog_errno(status); |
| 1032 | goto leave; |
| 1033 | } |
| 1034 | |
| 1035 | status = ocfs2_register_hb_callbacks(osb); |
| 1036 | if (status < 0) { |
| 1037 | mlog_errno(status); |
| 1038 | goto leave; |
| 1039 | } |
| 1040 | |
| 1041 | status = ocfs2_dlm_init(osb); |
| 1042 | if (status < 0) { |
| 1043 | mlog_errno(status); |
| 1044 | goto leave; |
| 1045 | } |
| 1046 | |
| 1047 | /* requires vote_thread to be running. */ |
| 1048 | status = ocfs2_register_net_handlers(osb); |
| 1049 | if (status < 0) { |
| 1050 | mlog_errno(status); |
| 1051 | goto leave; |
| 1052 | } |
| 1053 | |
| 1054 | status = ocfs2_super_lock(osb, 1); |
| 1055 | if (status < 0) { |
| 1056 | mlog_errno(status); |
| 1057 | goto leave; |
| 1058 | } |
| 1059 | unlock_super = 1; |
| 1060 | |
| 1061 | /* This will load up the node map and add ourselves to it. */ |
| 1062 | status = ocfs2_find_slot(osb); |
| 1063 | if (status < 0) { |
| 1064 | mlog_errno(status); |
| 1065 | goto leave; |
| 1066 | } |
| 1067 | |
| 1068 | ocfs2_populate_mounted_map(osb); |
| 1069 | |
| 1070 | /* load all node-local system inodes */ |
| 1071 | status = ocfs2_init_local_system_inodes(osb); |
| 1072 | if (status < 0) { |
| 1073 | mlog_errno(status); |
| 1074 | goto leave; |
| 1075 | } |
| 1076 | |
| 1077 | status = ocfs2_check_volume(osb); |
| 1078 | if (status < 0) { |
| 1079 | mlog_errno(status); |
| 1080 | goto leave; |
| 1081 | } |
| 1082 | |
| 1083 | status = ocfs2_truncate_log_init(osb); |
| 1084 | if (status < 0) { |
| 1085 | mlog_errno(status); |
| 1086 | goto leave; |
| 1087 | } |
| 1088 | |
| 1089 | /* This should be sent *after* we recovered our journal as it |
| 1090 | * will cause other nodes to unmark us as needing |
| 1091 | * recovery. However, we need to send it *before* dropping the |
| 1092 | * super block lock as otherwise their recovery threads might |
| 1093 | * try to clean us up while we're live! */ |
| 1094 | status = ocfs2_request_mount_vote(osb); |
| 1095 | if (status < 0) |
| 1096 | mlog_errno(status); |
| 1097 | |
| 1098 | leave: |
| 1099 | if (unlock_super) |
| 1100 | ocfs2_super_unlock(osb, 1); |
| 1101 | |
| 1102 | mlog_exit(status); |
| 1103 | return status; |
| 1104 | } |
| 1105 | |
| 1106 | /* we can't grab the goofy sem lock from inside wait_event, so we use |
| 1107 | * memory barriers to make sure that we'll see the null task before |
| 1108 | * being woken up */ |
| 1109 | static int ocfs2_recovery_thread_running(struct ocfs2_super *osb) |
| 1110 | { |
| 1111 | mb(); |
| 1112 | return osb->recovery_thread_task != NULL; |
| 1113 | } |
| 1114 | |
| 1115 | static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) |
| 1116 | { |
| 1117 | int tmp; |
| 1118 | struct ocfs2_super *osb = NULL; |
| 1119 | |
| 1120 | mlog_entry("(0x%p)\n", sb); |
| 1121 | |
| 1122 | BUG_ON(!sb); |
| 1123 | osb = OCFS2_SB(sb); |
| 1124 | BUG_ON(!osb); |
| 1125 | |
| 1126 | ocfs2_shutdown_local_alloc(osb); |
| 1127 | |
| 1128 | ocfs2_truncate_log_shutdown(osb); |
| 1129 | |
| 1130 | /* disable any new recovery threads and wait for any currently |
| 1131 | * running ones to exit. Do this before setting the vol_state. */ |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 1132 | mutex_lock(&osb->recovery_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1133 | osb->disable_recovery = 1; |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 1134 | mutex_unlock(&osb->recovery_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1135 | wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb)); |
| 1136 | |
| 1137 | /* At this point, we know that no more recovery threads can be |
| 1138 | * launched, so wait for any recovery completion work to |
| 1139 | * complete. */ |
| 1140 | flush_workqueue(ocfs2_wq); |
| 1141 | |
| 1142 | ocfs2_journal_shutdown(osb); |
| 1143 | |
| 1144 | ocfs2_sync_blockdev(sb); |
| 1145 | |
| 1146 | /* No dlm means we've failed during mount, so skip all the |
| 1147 | * steps which depended on that to complete. */ |
| 1148 | if (osb->dlm) { |
| 1149 | tmp = ocfs2_super_lock(osb, 1); |
| 1150 | if (tmp < 0) { |
| 1151 | mlog_errno(tmp); |
| 1152 | return; |
| 1153 | } |
| 1154 | |
| 1155 | tmp = ocfs2_request_umount_vote(osb); |
| 1156 | if (tmp < 0) |
| 1157 | mlog_errno(tmp); |
| 1158 | |
| 1159 | if (osb->slot_num != OCFS2_INVALID_SLOT) |
| 1160 | ocfs2_put_slot(osb); |
| 1161 | |
| 1162 | ocfs2_super_unlock(osb, 1); |
| 1163 | } |
| 1164 | |
| 1165 | ocfs2_release_system_inodes(osb); |
| 1166 | |
| 1167 | if (osb->dlm) { |
| 1168 | ocfs2_unregister_net_handlers(osb); |
| 1169 | |
| 1170 | ocfs2_dlm_shutdown(osb); |
| 1171 | } |
| 1172 | |
| 1173 | ocfs2_clear_hb_callbacks(osb); |
| 1174 | |
| 1175 | debugfs_remove(osb->osb_debug_root); |
| 1176 | |
| 1177 | if (!mnt_err) |
| 1178 | ocfs2_stop_heartbeat(osb); |
| 1179 | |
| 1180 | atomic_set(&osb->vol_state, VOLUME_DISMOUNTED); |
| 1181 | |
Sunil Mushran | 781ee3e | 2006-04-27 16:41:31 -0700 | [diff] [blame] | 1182 | printk(KERN_INFO "ocfs2: Unmounting device (%s) on (node %d)\n", |
| 1183 | osb->dev_str, osb->node_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1184 | |
| 1185 | ocfs2_delete_osb(osb); |
| 1186 | kfree(osb); |
| 1187 | sb->s_dev = 0; |
| 1188 | sb->s_fs_info = NULL; |
| 1189 | } |
| 1190 | |
| 1191 | static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, |
| 1192 | unsigned uuid_bytes) |
| 1193 | { |
| 1194 | int i, ret; |
| 1195 | char *ptr; |
| 1196 | |
| 1197 | BUG_ON(uuid_bytes != OCFS2_VOL_UUID_LEN); |
| 1198 | |
| 1199 | osb->uuid_str = kcalloc(1, OCFS2_VOL_UUID_LEN * 2 + 1, GFP_KERNEL); |
| 1200 | if (osb->uuid_str == NULL) |
| 1201 | return -ENOMEM; |
| 1202 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1203 | for (i = 0, ptr = osb->uuid_str; i < OCFS2_VOL_UUID_LEN; i++) { |
| 1204 | /* print with null */ |
| 1205 | ret = snprintf(ptr, 3, "%02X", uuid[i]); |
| 1206 | if (ret != 2) /* drop super cleans up */ |
| 1207 | return -EINVAL; |
| 1208 | /* then only advance past the last char */ |
| 1209 | ptr += 2; |
| 1210 | } |
| 1211 | |
| 1212 | return 0; |
| 1213 | } |
| 1214 | |
| 1215 | static int ocfs2_initialize_super(struct super_block *sb, |
| 1216 | struct buffer_head *bh, |
| 1217 | int sector_size) |
| 1218 | { |
| 1219 | int status = 0; |
| 1220 | int i; |
| 1221 | struct ocfs2_dinode *di = NULL; |
| 1222 | struct inode *inode = NULL; |
| 1223 | struct buffer_head *bitmap_bh = NULL; |
| 1224 | struct ocfs2_journal *journal; |
| 1225 | __le32 uuid_net_key; |
| 1226 | struct ocfs2_super *osb; |
| 1227 | |
| 1228 | mlog_entry_void(); |
| 1229 | |
| 1230 | osb = kcalloc(1, sizeof(struct ocfs2_super), GFP_KERNEL); |
| 1231 | if (!osb) { |
| 1232 | status = -ENOMEM; |
| 1233 | mlog_errno(status); |
| 1234 | goto bail; |
| 1235 | } |
| 1236 | |
| 1237 | sb->s_fs_info = osb; |
| 1238 | sb->s_op = &ocfs2_sops; |
| 1239 | sb->s_export_op = &ocfs2_export_ops; |
| 1240 | sb->s_flags |= MS_NOATIME; |
| 1241 | /* this is needed to support O_LARGEFILE */ |
| 1242 | sb->s_maxbytes = ocfs2_max_file_offset(sb->s_blocksize_bits); |
| 1243 | |
| 1244 | osb->sb = sb; |
| 1245 | /* Save off for ocfs2_rw_direct */ |
| 1246 | osb->s_sectsize_bits = blksize_bits(sector_size); |
Eric Sesterhenn / snakebyte | ebdec83 | 2006-01-27 10:32:52 +0100 | [diff] [blame] | 1247 | BUG_ON(!osb->s_sectsize_bits); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1248 | |
| 1249 | osb->net_response_ids = 0; |
| 1250 | spin_lock_init(&osb->net_response_lock); |
| 1251 | INIT_LIST_HEAD(&osb->net_response_list); |
| 1252 | |
| 1253 | INIT_LIST_HEAD(&osb->osb_net_handlers); |
| 1254 | init_waitqueue_head(&osb->recovery_event); |
| 1255 | spin_lock_init(&osb->vote_task_lock); |
| 1256 | init_waitqueue_head(&osb->vote_event); |
| 1257 | osb->vote_work_sequence = 0; |
| 1258 | osb->vote_wake_sequence = 0; |
| 1259 | INIT_LIST_HEAD(&osb->blocked_lock_list); |
| 1260 | osb->blocked_lock_count = 0; |
| 1261 | INIT_LIST_HEAD(&osb->vote_list); |
| 1262 | spin_lock_init(&osb->osb_lock); |
| 1263 | |
| 1264 | atomic_set(&osb->alloc_stats.moves, 0); |
| 1265 | atomic_set(&osb->alloc_stats.local_data, 0); |
| 1266 | atomic_set(&osb->alloc_stats.bitmap_data, 0); |
| 1267 | atomic_set(&osb->alloc_stats.bg_allocs, 0); |
| 1268 | atomic_set(&osb->alloc_stats.bg_extends, 0); |
| 1269 | |
| 1270 | ocfs2_init_node_maps(osb); |
| 1271 | |
| 1272 | snprintf(osb->dev_str, sizeof(osb->dev_str), "%u,%u", |
| 1273 | MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); |
| 1274 | |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 1275 | mutex_init(&osb->recovery_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1276 | |
| 1277 | osb->disable_recovery = 0; |
| 1278 | osb->recovery_thread_task = NULL; |
| 1279 | |
| 1280 | init_waitqueue_head(&osb->checkpoint_event); |
| 1281 | atomic_set(&osb->needs_checkpoint, 0); |
| 1282 | |
| 1283 | osb->node_num = O2NM_INVALID_NODE_NUM; |
| 1284 | osb->slot_num = OCFS2_INVALID_SLOT; |
| 1285 | |
| 1286 | osb->local_alloc_state = OCFS2_LA_UNUSED; |
| 1287 | osb->local_alloc_bh = NULL; |
| 1288 | |
| 1289 | ocfs2_setup_hb_callbacks(osb); |
| 1290 | |
| 1291 | init_waitqueue_head(&osb->osb_mount_event); |
| 1292 | |
| 1293 | osb->vol_label = kmalloc(OCFS2_MAX_VOL_LABEL_LEN, GFP_KERNEL); |
| 1294 | if (!osb->vol_label) { |
| 1295 | mlog(ML_ERROR, "unable to alloc vol label\n"); |
| 1296 | status = -ENOMEM; |
| 1297 | goto bail; |
| 1298 | } |
| 1299 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1300 | di = (struct ocfs2_dinode *)bh->b_data; |
| 1301 | |
| 1302 | osb->max_slots = le16_to_cpu(di->id2.i_super.s_max_slots); |
| 1303 | if (osb->max_slots > OCFS2_MAX_SLOTS || osb->max_slots == 0) { |
| 1304 | mlog(ML_ERROR, "Invalid number of node slots (%u)\n", |
| 1305 | osb->max_slots); |
| 1306 | status = -EINVAL; |
| 1307 | goto bail; |
| 1308 | } |
Sunil Mushran | 781ee3e | 2006-04-27 16:41:31 -0700 | [diff] [blame] | 1309 | mlog(0, "max_slots for this device: %u\n", osb->max_slots); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1310 | |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1311 | init_waitqueue_head(&osb->osb_wipe_event); |
| 1312 | osb->osb_orphan_wipes = kcalloc(osb->max_slots, |
| 1313 | sizeof(*osb->osb_orphan_wipes), |
| 1314 | GFP_KERNEL); |
| 1315 | if (!osb->osb_orphan_wipes) { |
| 1316 | status = -ENOMEM; |
| 1317 | mlog_errno(status); |
| 1318 | goto bail; |
| 1319 | } |
| 1320 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1321 | osb->s_feature_compat = |
| 1322 | le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_compat); |
| 1323 | osb->s_feature_ro_compat = |
| 1324 | le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_ro_compat); |
| 1325 | osb->s_feature_incompat = |
| 1326 | le32_to_cpu(OCFS2_RAW_SB(di)->s_feature_incompat); |
| 1327 | |
| 1328 | if ((i = OCFS2_HAS_INCOMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_INCOMPAT_SUPP))) { |
| 1329 | mlog(ML_ERROR, "couldn't mount because of unsupported " |
| 1330 | "optional features (%x).\n", i); |
| 1331 | status = -EINVAL; |
| 1332 | goto bail; |
| 1333 | } |
| 1334 | if (!(osb->sb->s_flags & MS_RDONLY) && |
| 1335 | (i = OCFS2_HAS_RO_COMPAT_FEATURE(osb->sb, ~OCFS2_FEATURE_RO_COMPAT_SUPP))) { |
| 1336 | mlog(ML_ERROR, "couldn't mount RDWR because of " |
| 1337 | "unsupported optional features (%x).\n", i); |
| 1338 | status = -EINVAL; |
| 1339 | goto bail; |
| 1340 | } |
| 1341 | |
| 1342 | get_random_bytes(&osb->s_next_generation, sizeof(u32)); |
| 1343 | |
| 1344 | /* FIXME |
| 1345 | * This should be done in ocfs2_journal_init(), but unknown |
| 1346 | * ordering issues will cause the filesystem to crash. |
| 1347 | * If anyone wants to figure out what part of the code |
| 1348 | * refers to osb->journal before ocfs2_journal_init() is run, |
| 1349 | * be my guest. |
| 1350 | */ |
| 1351 | /* initialize our journal structure */ |
| 1352 | |
| 1353 | journal = kcalloc(1, sizeof(struct ocfs2_journal), GFP_KERNEL); |
| 1354 | if (!journal) { |
| 1355 | mlog(ML_ERROR, "unable to alloc journal\n"); |
| 1356 | status = -ENOMEM; |
| 1357 | goto bail; |
| 1358 | } |
| 1359 | osb->journal = journal; |
| 1360 | journal->j_osb = osb; |
| 1361 | |
| 1362 | atomic_set(&journal->j_num_trans, 0); |
| 1363 | init_rwsem(&journal->j_trans_barrier); |
| 1364 | init_waitqueue_head(&journal->j_checkpointed); |
| 1365 | spin_lock_init(&journal->j_lock); |
| 1366 | journal->j_trans_id = (unsigned long) 1; |
| 1367 | INIT_LIST_HEAD(&journal->j_la_cleanups); |
| 1368 | INIT_WORK(&journal->j_recovery_work, ocfs2_complete_recovery, osb); |
| 1369 | journal->j_state = OCFS2_JOURNAL_FREE; |
| 1370 | |
| 1371 | /* get some pseudo constants for clustersize bits */ |
| 1372 | osb->s_clustersize_bits = |
| 1373 | le32_to_cpu(di->id2.i_super.s_clustersize_bits); |
| 1374 | osb->s_clustersize = 1 << osb->s_clustersize_bits; |
| 1375 | mlog(0, "clusterbits=%d\n", osb->s_clustersize_bits); |
| 1376 | |
| 1377 | if (osb->s_clustersize < OCFS2_MIN_CLUSTERSIZE || |
| 1378 | osb->s_clustersize > OCFS2_MAX_CLUSTERSIZE) { |
| 1379 | mlog(ML_ERROR, "Volume has invalid cluster size (%d)\n", |
| 1380 | osb->s_clustersize); |
| 1381 | status = -EINVAL; |
| 1382 | goto bail; |
| 1383 | } |
| 1384 | |
| 1385 | if (ocfs2_clusters_to_blocks(osb->sb, le32_to_cpu(di->i_clusters) - 1) |
| 1386 | > (u32)~0UL) { |
| 1387 | mlog(ML_ERROR, "Volume might try to write to blocks beyond " |
| 1388 | "what jbd can address in 32 bits.\n"); |
| 1389 | status = -EINVAL; |
| 1390 | goto bail; |
| 1391 | } |
| 1392 | |
| 1393 | if (ocfs2_setup_osb_uuid(osb, di->id2.i_super.s_uuid, |
| 1394 | sizeof(di->id2.i_super.s_uuid))) { |
| 1395 | mlog(ML_ERROR, "Out of memory trying to setup our uuid.\n"); |
| 1396 | status = -ENOMEM; |
| 1397 | goto bail; |
| 1398 | } |
| 1399 | |
Mark Fasheh | 7842704 | 2006-05-04 12:03:26 -0700 | [diff] [blame] | 1400 | memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key)); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1401 | osb->net_key = le32_to_cpu(uuid_net_key); |
| 1402 | |
| 1403 | strncpy(osb->vol_label, di->id2.i_super.s_label, 63); |
| 1404 | osb->vol_label[63] = '\0'; |
| 1405 | osb->root_blkno = le64_to_cpu(di->id2.i_super.s_root_blkno); |
| 1406 | osb->system_dir_blkno = le64_to_cpu(di->id2.i_super.s_system_dir_blkno); |
| 1407 | osb->first_cluster_group_blkno = |
| 1408 | le64_to_cpu(di->id2.i_super.s_first_cluster_group); |
| 1409 | osb->fs_generation = le32_to_cpu(di->i_fs_generation); |
| 1410 | mlog(0, "vol_label: %s\n", osb->vol_label); |
| 1411 | mlog(0, "uuid: %s\n", osb->uuid_str); |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1412 | mlog(0, "root_blkno=%llu, system_dir_blkno=%llu\n", |
| 1413 | (unsigned long long)osb->root_blkno, |
| 1414 | (unsigned long long)osb->system_dir_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1415 | |
| 1416 | osb->osb_dlm_debug = ocfs2_new_dlm_debug(); |
| 1417 | if (!osb->osb_dlm_debug) { |
| 1418 | status = -ENOMEM; |
| 1419 | mlog_errno(status); |
| 1420 | goto bail; |
| 1421 | } |
| 1422 | |
| 1423 | atomic_set(&osb->vol_state, VOLUME_INIT); |
| 1424 | |
| 1425 | /* load root, system_dir, and all global system inodes */ |
| 1426 | status = ocfs2_init_global_system_inodes(osb); |
| 1427 | if (status < 0) { |
| 1428 | mlog_errno(status); |
| 1429 | goto bail; |
| 1430 | } |
| 1431 | |
| 1432 | /* |
| 1433 | * global bitmap |
| 1434 | */ |
| 1435 | inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, |
| 1436 | OCFS2_INVALID_SLOT); |
| 1437 | if (!inode) { |
| 1438 | status = -EINVAL; |
| 1439 | mlog_errno(status); |
| 1440 | goto bail; |
| 1441 | } |
| 1442 | |
| 1443 | osb->bitmap_blkno = OCFS2_I(inode)->ip_blkno; |
| 1444 | |
Mark Fasheh | 101ebf2 | 2006-05-02 17:54:45 -0700 | [diff] [blame] | 1445 | /* We don't have a cluster lock on the bitmap here because |
| 1446 | * we're only interested in static information and the extra |
| 1447 | * complexity at mount time isn't worht it. Don't pass the |
| 1448 | * inode in to the read function though as we don't want it to |
| 1449 | * be put in the cache. */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1450 | status = ocfs2_read_block(osb, osb->bitmap_blkno, &bitmap_bh, 0, |
Mark Fasheh | 101ebf2 | 2006-05-02 17:54:45 -0700 | [diff] [blame] | 1451 | NULL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1452 | iput(inode); |
| 1453 | if (status < 0) { |
| 1454 | mlog_errno(status); |
| 1455 | goto bail; |
| 1456 | } |
| 1457 | |
| 1458 | di = (struct ocfs2_dinode *) bitmap_bh->b_data; |
| 1459 | osb->bitmap_cpg = le16_to_cpu(di->id2.i_chain.cl_cpg); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1460 | brelse(bitmap_bh); |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1461 | mlog(0, "cluster bitmap inode: %llu, clusters per group: %u\n", |
| 1462 | (unsigned long long)osb->bitmap_blkno, osb->bitmap_cpg); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1463 | |
| 1464 | status = ocfs2_init_slot_info(osb); |
| 1465 | if (status < 0) { |
| 1466 | mlog_errno(status); |
| 1467 | goto bail; |
| 1468 | } |
| 1469 | |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1470 | bail: |
| 1471 | mlog_exit(status); |
| 1472 | return status; |
| 1473 | } |
| 1474 | |
| 1475 | /* |
| 1476 | * will return: -EAGAIN if it is ok to keep searching for superblocks |
| 1477 | * -EINVAL if there is a bad superblock |
| 1478 | * 0 on success |
| 1479 | */ |
| 1480 | static int ocfs2_verify_volume(struct ocfs2_dinode *di, |
| 1481 | struct buffer_head *bh, |
| 1482 | u32 blksz) |
| 1483 | { |
| 1484 | int status = -EAGAIN; |
| 1485 | |
| 1486 | mlog_entry_void(); |
| 1487 | |
| 1488 | if (memcmp(di->i_signature, OCFS2_SUPER_BLOCK_SIGNATURE, |
| 1489 | strlen(OCFS2_SUPER_BLOCK_SIGNATURE)) == 0) { |
| 1490 | status = -EINVAL; |
| 1491 | if ((1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits)) != blksz) { |
| 1492 | mlog(ML_ERROR, "found superblock with incorrect block " |
| 1493 | "size: found %u, should be %u\n", |
| 1494 | 1 << le32_to_cpu(di->id2.i_super.s_blocksize_bits), |
| 1495 | blksz); |
| 1496 | } else if (le16_to_cpu(di->id2.i_super.s_major_rev_level) != |
| 1497 | OCFS2_MAJOR_REV_LEVEL || |
| 1498 | le16_to_cpu(di->id2.i_super.s_minor_rev_level) != |
| 1499 | OCFS2_MINOR_REV_LEVEL) { |
| 1500 | mlog(ML_ERROR, "found superblock with bad version: " |
| 1501 | "found %u.%u, should be %u.%u\n", |
| 1502 | le16_to_cpu(di->id2.i_super.s_major_rev_level), |
| 1503 | le16_to_cpu(di->id2.i_super.s_minor_rev_level), |
| 1504 | OCFS2_MAJOR_REV_LEVEL, |
| 1505 | OCFS2_MINOR_REV_LEVEL); |
| 1506 | } else if (bh->b_blocknr != le64_to_cpu(di->i_blkno)) { |
| 1507 | mlog(ML_ERROR, "bad block number on superblock: " |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1508 | "found %llu, should be %llu\n", |
| 1509 | (unsigned long long)di->i_blkno, |
| 1510 | (unsigned long long)bh->b_blocknr); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1511 | } else if (le32_to_cpu(di->id2.i_super.s_clustersize_bits) < 12 || |
| 1512 | le32_to_cpu(di->id2.i_super.s_clustersize_bits) > 20) { |
| 1513 | mlog(ML_ERROR, "bad cluster size found: %u\n", |
| 1514 | 1 << le32_to_cpu(di->id2.i_super.s_clustersize_bits)); |
| 1515 | } else if (!le64_to_cpu(di->id2.i_super.s_root_blkno)) { |
| 1516 | mlog(ML_ERROR, "bad root_blkno: 0\n"); |
| 1517 | } else if (!le64_to_cpu(di->id2.i_super.s_system_dir_blkno)) { |
| 1518 | mlog(ML_ERROR, "bad system_dir_blkno: 0\n"); |
| 1519 | } else if (le16_to_cpu(di->id2.i_super.s_max_slots) > OCFS2_MAX_SLOTS) { |
| 1520 | mlog(ML_ERROR, |
| 1521 | "Superblock slots found greater than file system " |
| 1522 | "maximum: found %u, max %u\n", |
| 1523 | le16_to_cpu(di->id2.i_super.s_max_slots), |
| 1524 | OCFS2_MAX_SLOTS); |
| 1525 | } else { |
| 1526 | /* found it! */ |
| 1527 | status = 0; |
| 1528 | } |
| 1529 | } |
| 1530 | |
| 1531 | mlog_exit(status); |
| 1532 | return status; |
| 1533 | } |
| 1534 | |
| 1535 | static int ocfs2_check_volume(struct ocfs2_super *osb) |
| 1536 | { |
| 1537 | int status = 0; |
| 1538 | int dirty; |
| 1539 | struct ocfs2_dinode *local_alloc = NULL; /* only used if we |
| 1540 | * recover |
| 1541 | * ourselves. */ |
| 1542 | |
| 1543 | mlog_entry_void(); |
| 1544 | |
| 1545 | /* Init our journal object. */ |
| 1546 | status = ocfs2_journal_init(osb->journal, &dirty); |
| 1547 | if (status < 0) { |
| 1548 | mlog(ML_ERROR, "Could not initialize journal!\n"); |
| 1549 | goto finally; |
| 1550 | } |
| 1551 | |
| 1552 | /* If the journal was unmounted cleanly then we don't want to |
| 1553 | * recover anything. Otherwise, journal_load will do that |
| 1554 | * dirty work for us :) */ |
| 1555 | if (!dirty) { |
| 1556 | status = ocfs2_journal_wipe(osb->journal, 0); |
| 1557 | if (status < 0) { |
| 1558 | mlog_errno(status); |
| 1559 | goto finally; |
| 1560 | } |
| 1561 | } else { |
| 1562 | mlog(ML_NOTICE, "File system was not unmounted cleanly, " |
| 1563 | "recovering volume.\n"); |
| 1564 | } |
| 1565 | |
| 1566 | /* will play back anything left in the journal. */ |
| 1567 | ocfs2_journal_load(osb->journal); |
| 1568 | |
| 1569 | if (dirty) { |
| 1570 | /* recover my local alloc if we didn't unmount cleanly. */ |
| 1571 | status = ocfs2_begin_local_alloc_recovery(osb, |
| 1572 | osb->slot_num, |
| 1573 | &local_alloc); |
| 1574 | if (status < 0) { |
| 1575 | mlog_errno(status); |
| 1576 | goto finally; |
| 1577 | } |
| 1578 | /* we complete the recovery process after we've marked |
| 1579 | * ourselves as mounted. */ |
| 1580 | } |
| 1581 | |
| 1582 | mlog(0, "Journal loaded.\n"); |
| 1583 | |
| 1584 | status = ocfs2_load_local_alloc(osb); |
| 1585 | if (status < 0) { |
| 1586 | mlog_errno(status); |
| 1587 | goto finally; |
| 1588 | } |
| 1589 | |
| 1590 | if (dirty) { |
| 1591 | /* Recovery will be completed after we've mounted the |
| 1592 | * rest of the volume. */ |
| 1593 | osb->dirty = 1; |
| 1594 | osb->local_alloc_copy = local_alloc; |
| 1595 | local_alloc = NULL; |
| 1596 | } |
| 1597 | |
| 1598 | /* go through each journal, trylock it and if you get the |
| 1599 | * lock, and it's marked as dirty, set the bit in the recover |
| 1600 | * map and launch a recovery thread for it. */ |
| 1601 | status = ocfs2_mark_dead_nodes(osb); |
| 1602 | if (status < 0) |
| 1603 | mlog_errno(status); |
| 1604 | |
| 1605 | finally: |
| 1606 | if (local_alloc) |
| 1607 | kfree(local_alloc); |
| 1608 | |
| 1609 | mlog_exit(status); |
| 1610 | return status; |
| 1611 | } |
| 1612 | |
| 1613 | /* |
| 1614 | * The routine gets called from dismount or close whenever a dismount on |
| 1615 | * volume is requested and the osb open count becomes 1. |
| 1616 | * It will remove the osb from the global list and also free up all the |
| 1617 | * initialized resources and fileobject. |
| 1618 | */ |
| 1619 | static void ocfs2_delete_osb(struct ocfs2_super *osb) |
| 1620 | { |
| 1621 | mlog_entry_void(); |
| 1622 | |
| 1623 | /* This function assumes that the caller has the main osb resource */ |
| 1624 | |
| 1625 | if (osb->slot_info) |
| 1626 | ocfs2_free_slot_info(osb->slot_info); |
| 1627 | |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1628 | kfree(osb->osb_orphan_wipes); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1629 | /* FIXME |
| 1630 | * This belongs in journal shutdown, but because we have to |
| 1631 | * allocate osb->journal at the start of ocfs2_initalize_osb(), |
| 1632 | * we free it here. |
| 1633 | */ |
| 1634 | kfree(osb->journal); |
| 1635 | if (osb->local_alloc_copy) |
| 1636 | kfree(osb->local_alloc_copy); |
| 1637 | kfree(osb->uuid_str); |
| 1638 | ocfs2_put_dlm_debug(osb->osb_dlm_debug); |
| 1639 | memset(osb, 0, sizeof(struct ocfs2_super)); |
| 1640 | |
| 1641 | mlog_exit_void(); |
| 1642 | } |
| 1643 | |
| 1644 | /* Put OCFS2 into a readonly state, or (if the user specifies it), |
| 1645 | * panic(). We do not support continue-on-error operation. */ |
| 1646 | static void ocfs2_handle_error(struct super_block *sb) |
| 1647 | { |
| 1648 | struct ocfs2_super *osb = OCFS2_SB(sb); |
| 1649 | |
| 1650 | if (osb->s_mount_opt & OCFS2_MOUNT_ERRORS_PANIC) |
| 1651 | panic("OCFS2: (device %s): panic forced after error\n", |
| 1652 | sb->s_id); |
| 1653 | |
| 1654 | ocfs2_set_osb_flag(osb, OCFS2_OSB_ERROR_FS); |
| 1655 | |
| 1656 | if (sb->s_flags & MS_RDONLY && |
| 1657 | (ocfs2_is_soft_readonly(osb) || |
| 1658 | ocfs2_is_hard_readonly(osb))) |
| 1659 | return; |
| 1660 | |
| 1661 | printk(KERN_CRIT "File system is now read-only due to the potential " |
| 1662 | "of on-disk corruption. Please run fsck.ocfs2 once the file " |
| 1663 | "system is unmounted.\n"); |
| 1664 | sb->s_flags |= MS_RDONLY; |
| 1665 | ocfs2_set_ro_flag(osb, 0); |
| 1666 | } |
| 1667 | |
| 1668 | static char error_buf[1024]; |
| 1669 | |
| 1670 | void __ocfs2_error(struct super_block *sb, |
| 1671 | const char *function, |
| 1672 | const char *fmt, ...) |
| 1673 | { |
| 1674 | va_list args; |
| 1675 | |
| 1676 | va_start(args, fmt); |
| 1677 | vsprintf(error_buf, fmt, args); |
| 1678 | va_end(args); |
| 1679 | |
| 1680 | /* Not using mlog here because we want to show the actual |
| 1681 | * function the error came from. */ |
| 1682 | printk(KERN_CRIT "OCFS2: ERROR (device %s): %s: %s\n", |
| 1683 | sb->s_id, function, error_buf); |
| 1684 | |
| 1685 | ocfs2_handle_error(sb); |
| 1686 | } |
| 1687 | |
| 1688 | /* Handle critical errors. This is intentionally more drastic than |
| 1689 | * ocfs2_handle_error, so we only use for things like journal errors, |
| 1690 | * etc. */ |
| 1691 | void __ocfs2_abort(struct super_block* sb, |
| 1692 | const char *function, |
| 1693 | const char *fmt, ...) |
| 1694 | { |
| 1695 | va_list args; |
| 1696 | |
| 1697 | va_start(args, fmt); |
| 1698 | vsprintf(error_buf, fmt, args); |
| 1699 | va_end(args); |
| 1700 | |
| 1701 | printk(KERN_CRIT "OCFS2: abort (device %s): %s: %s\n", |
| 1702 | sb->s_id, function, error_buf); |
| 1703 | |
| 1704 | /* We don't have the cluster support yet to go straight to |
| 1705 | * hard readonly in here. Until then, we want to keep |
| 1706 | * ocfs2_abort() so that we can at least mark critical |
| 1707 | * errors. |
| 1708 | * |
| 1709 | * TODO: This should abort the journal and alert other nodes |
| 1710 | * that our slot needs recovery. */ |
| 1711 | |
| 1712 | /* Force a panic(). This stinks, but it's better than letting |
| 1713 | * things continue without having a proper hard readonly |
| 1714 | * here. */ |
| 1715 | OCFS2_SB(sb)->s_mount_opt |= OCFS2_MOUNT_ERRORS_PANIC; |
| 1716 | ocfs2_handle_error(sb); |
| 1717 | } |
| 1718 | |
| 1719 | module_init(ocfs2_init); |
| 1720 | module_exit(ocfs2_exit); |