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 | * journal.c |
| 5 | * |
| 6 | * Defines functions of journalling api |
| 7 | * |
| 8 | * Copyright (C) 2003, 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/fs.h> |
| 27 | #include <linux/types.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/highmem.h> |
| 30 | #include <linux/kthread.h> |
| 31 | |
| 32 | #define MLOG_MASK_PREFIX ML_JOURNAL |
| 33 | #include <cluster/masklog.h> |
| 34 | |
| 35 | #include "ocfs2.h" |
| 36 | |
| 37 | #include "alloc.h" |
| 38 | #include "dlmglue.h" |
| 39 | #include "extent_map.h" |
| 40 | #include "heartbeat.h" |
| 41 | #include "inode.h" |
| 42 | #include "journal.h" |
| 43 | #include "localalloc.h" |
| 44 | #include "namei.h" |
| 45 | #include "slot_map.h" |
| 46 | #include "super.h" |
| 47 | #include "vote.h" |
| 48 | #include "sysfile.h" |
| 49 | |
| 50 | #include "buffer_head_io.h" |
| 51 | |
| 52 | spinlock_t trans_inc_lock = SPIN_LOCK_UNLOCKED; |
| 53 | |
| 54 | static int ocfs2_force_read_journal(struct inode *inode); |
| 55 | static int ocfs2_recover_node(struct ocfs2_super *osb, |
| 56 | int node_num); |
| 57 | static int __ocfs2_recovery_thread(void *arg); |
| 58 | static int ocfs2_commit_cache(struct ocfs2_super *osb); |
| 59 | static int ocfs2_wait_on_mount(struct ocfs2_super *osb); |
| 60 | static void ocfs2_handle_cleanup_locks(struct ocfs2_journal *journal, |
| 61 | struct ocfs2_journal_handle *handle); |
| 62 | static void ocfs2_commit_unstarted_handle(struct ocfs2_journal_handle *handle); |
| 63 | static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb, |
| 64 | int dirty); |
| 65 | static int ocfs2_trylock_journal(struct ocfs2_super *osb, |
| 66 | int slot_num); |
| 67 | static int ocfs2_recover_orphans(struct ocfs2_super *osb, |
| 68 | int slot); |
| 69 | static int ocfs2_commit_thread(void *arg); |
| 70 | |
| 71 | static int ocfs2_commit_cache(struct ocfs2_super *osb) |
| 72 | { |
| 73 | int status = 0; |
| 74 | unsigned int flushed; |
| 75 | unsigned long old_id; |
| 76 | struct ocfs2_journal *journal = NULL; |
| 77 | |
| 78 | mlog_entry_void(); |
| 79 | |
| 80 | journal = osb->journal; |
| 81 | |
| 82 | /* Flush all pending commits and checkpoint the journal. */ |
| 83 | down_write(&journal->j_trans_barrier); |
| 84 | |
| 85 | if (atomic_read(&journal->j_num_trans) == 0) { |
| 86 | up_write(&journal->j_trans_barrier); |
| 87 | mlog(0, "No transactions for me to flush!\n"); |
| 88 | goto finally; |
| 89 | } |
| 90 | |
| 91 | journal_lock_updates(journal->j_journal); |
| 92 | status = journal_flush(journal->j_journal); |
| 93 | journal_unlock_updates(journal->j_journal); |
| 94 | if (status < 0) { |
| 95 | up_write(&journal->j_trans_barrier); |
| 96 | mlog_errno(status); |
| 97 | goto finally; |
| 98 | } |
| 99 | |
| 100 | old_id = ocfs2_inc_trans_id(journal); |
| 101 | |
| 102 | flushed = atomic_read(&journal->j_num_trans); |
| 103 | atomic_set(&journal->j_num_trans, 0); |
| 104 | up_write(&journal->j_trans_barrier); |
| 105 | |
| 106 | mlog(0, "commit_thread: flushed transaction %lu (%u handles)\n", |
| 107 | journal->j_trans_id, flushed); |
| 108 | |
| 109 | ocfs2_kick_vote_thread(osb); |
| 110 | wake_up(&journal->j_checkpointed); |
| 111 | finally: |
| 112 | mlog_exit(status); |
| 113 | return status; |
| 114 | } |
| 115 | |
| 116 | struct ocfs2_journal_handle *ocfs2_alloc_handle(struct ocfs2_super *osb) |
| 117 | { |
| 118 | struct ocfs2_journal_handle *retval = NULL; |
| 119 | |
Sunil Mushran | afae00ab | 2006-04-12 14:37:00 -0700 | [diff] [blame] | 120 | retval = kcalloc(1, sizeof(*retval), GFP_NOFS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 121 | if (!retval) { |
| 122 | mlog(ML_ERROR, "Failed to allocate memory for journal " |
| 123 | "handle!\n"); |
| 124 | return NULL; |
| 125 | } |
| 126 | |
| 127 | retval->max_buffs = 0; |
| 128 | retval->num_locks = 0; |
| 129 | retval->k_handle = NULL; |
| 130 | |
| 131 | INIT_LIST_HEAD(&retval->locks); |
| 132 | INIT_LIST_HEAD(&retval->inode_list); |
| 133 | retval->journal = osb->journal; |
| 134 | |
| 135 | return retval; |
| 136 | } |
| 137 | |
| 138 | /* pass it NULL and it will allocate a new handle object for you. If |
| 139 | * you pass it a handle however, it may still return error, in which |
| 140 | * case it has free'd the passed handle for you. */ |
| 141 | struct ocfs2_journal_handle *ocfs2_start_trans(struct ocfs2_super *osb, |
| 142 | struct ocfs2_journal_handle *handle, |
| 143 | int max_buffs) |
| 144 | { |
| 145 | int ret; |
| 146 | journal_t *journal = osb->journal->j_journal; |
| 147 | |
| 148 | mlog_entry("(max_buffs = %d)\n", max_buffs); |
| 149 | |
Eric Sesterhenn / snakebyte | ebdec83 | 2006-01-27 10:32:52 +0100 | [diff] [blame] | 150 | BUG_ON(!osb || !osb->journal->j_journal); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 151 | |
| 152 | if (ocfs2_is_hard_readonly(osb)) { |
| 153 | ret = -EROFS; |
| 154 | goto done_free; |
| 155 | } |
| 156 | |
| 157 | BUG_ON(osb->journal->j_state == OCFS2_JOURNAL_FREE); |
| 158 | BUG_ON(max_buffs <= 0); |
| 159 | |
| 160 | /* JBD might support this, but our journalling code doesn't yet. */ |
| 161 | if (journal_current_handle()) { |
| 162 | mlog(ML_ERROR, "Recursive transaction attempted!\n"); |
| 163 | BUG(); |
| 164 | } |
| 165 | |
| 166 | if (!handle) |
| 167 | handle = ocfs2_alloc_handle(osb); |
| 168 | if (!handle) { |
| 169 | ret = -ENOMEM; |
| 170 | mlog(ML_ERROR, "Failed to allocate memory for journal " |
| 171 | "handle!\n"); |
| 172 | goto done_free; |
| 173 | } |
| 174 | |
| 175 | handle->max_buffs = max_buffs; |
| 176 | |
| 177 | down_read(&osb->journal->j_trans_barrier); |
| 178 | |
| 179 | /* actually start the transaction now */ |
| 180 | handle->k_handle = journal_start(journal, max_buffs); |
| 181 | if (IS_ERR(handle->k_handle)) { |
| 182 | up_read(&osb->journal->j_trans_barrier); |
| 183 | |
| 184 | ret = PTR_ERR(handle->k_handle); |
| 185 | handle->k_handle = NULL; |
| 186 | mlog_errno(ret); |
| 187 | |
| 188 | if (is_journal_aborted(journal)) { |
| 189 | ocfs2_abort(osb->sb, "Detected aborted journal"); |
| 190 | ret = -EROFS; |
| 191 | } |
| 192 | goto done_free; |
| 193 | } |
| 194 | |
| 195 | atomic_inc(&(osb->journal->j_num_trans)); |
| 196 | handle->flags |= OCFS2_HANDLE_STARTED; |
| 197 | |
| 198 | mlog_exit_ptr(handle); |
| 199 | return handle; |
| 200 | |
| 201 | done_free: |
| 202 | if (handle) |
| 203 | ocfs2_commit_unstarted_handle(handle); /* will kfree handle */ |
| 204 | |
| 205 | mlog_exit(ret); |
| 206 | return ERR_PTR(ret); |
| 207 | } |
| 208 | |
| 209 | void ocfs2_handle_add_inode(struct ocfs2_journal_handle *handle, |
| 210 | struct inode *inode) |
| 211 | { |
| 212 | BUG_ON(!handle); |
| 213 | BUG_ON(!inode); |
| 214 | |
| 215 | atomic_inc(&inode->i_count); |
| 216 | |
| 217 | /* we're obviously changing it... */ |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 218 | mutex_lock(&inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 219 | |
| 220 | /* sanity check */ |
| 221 | BUG_ON(OCFS2_I(inode)->ip_handle); |
| 222 | BUG_ON(!list_empty(&OCFS2_I(inode)->ip_handle_list)); |
| 223 | |
| 224 | OCFS2_I(inode)->ip_handle = handle; |
| 225 | list_del(&(OCFS2_I(inode)->ip_handle_list)); |
| 226 | list_add_tail(&(OCFS2_I(inode)->ip_handle_list), &(handle->inode_list)); |
| 227 | } |
| 228 | |
| 229 | static void ocfs2_handle_unlock_inodes(struct ocfs2_journal_handle *handle) |
| 230 | { |
| 231 | struct list_head *p, *n; |
| 232 | struct inode *inode; |
| 233 | struct ocfs2_inode_info *oi; |
| 234 | |
| 235 | list_for_each_safe(p, n, &handle->inode_list) { |
| 236 | oi = list_entry(p, struct ocfs2_inode_info, |
| 237 | ip_handle_list); |
| 238 | inode = &oi->vfs_inode; |
| 239 | |
| 240 | OCFS2_I(inode)->ip_handle = NULL; |
| 241 | list_del_init(&OCFS2_I(inode)->ip_handle_list); |
| 242 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 243 | mutex_unlock(&inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 244 | iput(inode); |
| 245 | } |
| 246 | } |
| 247 | |
| 248 | /* This is trivial so we do it out of the main commit |
| 249 | * paths. Beware, it can be called from start_trans too! */ |
| 250 | static void ocfs2_commit_unstarted_handle(struct ocfs2_journal_handle *handle) |
| 251 | { |
| 252 | mlog_entry_void(); |
| 253 | |
| 254 | BUG_ON(handle->flags & OCFS2_HANDLE_STARTED); |
| 255 | |
| 256 | ocfs2_handle_unlock_inodes(handle); |
| 257 | /* You are allowed to add journal locks before the transaction |
| 258 | * has started. */ |
| 259 | ocfs2_handle_cleanup_locks(handle->journal, handle); |
| 260 | |
| 261 | kfree(handle); |
| 262 | |
| 263 | mlog_exit_void(); |
| 264 | } |
| 265 | |
| 266 | void ocfs2_commit_trans(struct ocfs2_journal_handle *handle) |
| 267 | { |
| 268 | handle_t *jbd_handle; |
| 269 | int retval; |
| 270 | struct ocfs2_journal *journal = handle->journal; |
| 271 | |
| 272 | mlog_entry_void(); |
| 273 | |
| 274 | BUG_ON(!handle); |
| 275 | |
| 276 | if (!(handle->flags & OCFS2_HANDLE_STARTED)) { |
| 277 | ocfs2_commit_unstarted_handle(handle); |
| 278 | mlog_exit_void(); |
| 279 | return; |
| 280 | } |
| 281 | |
| 282 | /* release inode semaphores we took during this transaction */ |
| 283 | ocfs2_handle_unlock_inodes(handle); |
| 284 | |
| 285 | /* ocfs2_extend_trans may have had to call journal_restart |
| 286 | * which will always commit the transaction, but may return |
| 287 | * error for any number of reasons. If this is the case, we |
| 288 | * clear k_handle as it's not valid any more. */ |
| 289 | if (handle->k_handle) { |
| 290 | jbd_handle = handle->k_handle; |
| 291 | |
| 292 | if (handle->flags & OCFS2_HANDLE_SYNC) |
| 293 | jbd_handle->h_sync = 1; |
| 294 | else |
| 295 | jbd_handle->h_sync = 0; |
| 296 | |
| 297 | /* actually stop the transaction. if we've set h_sync, |
| 298 | * it'll have been committed when we return */ |
| 299 | retval = journal_stop(jbd_handle); |
| 300 | if (retval < 0) { |
| 301 | mlog_errno(retval); |
| 302 | mlog(ML_ERROR, "Could not commit transaction\n"); |
| 303 | BUG(); |
| 304 | } |
| 305 | |
| 306 | handle->k_handle = NULL; /* it's been free'd in journal_stop */ |
| 307 | } |
| 308 | |
| 309 | ocfs2_handle_cleanup_locks(journal, handle); |
| 310 | |
| 311 | up_read(&journal->j_trans_barrier); |
| 312 | |
| 313 | kfree(handle); |
| 314 | mlog_exit_void(); |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * 'nblocks' is what you want to add to the current |
| 319 | * transaction. extend_trans will either extend the current handle by |
| 320 | * nblocks, or commit it and start a new one with nblocks credits. |
| 321 | * |
| 322 | * WARNING: This will not release any semaphores or disk locks taken |
| 323 | * during the transaction, so make sure they were taken *before* |
| 324 | * start_trans or we'll have ordering deadlocks. |
| 325 | * |
| 326 | * WARNING2: Note that we do *not* drop j_trans_barrier here. This is |
| 327 | * good because transaction ids haven't yet been recorded on the |
| 328 | * cluster locks associated with this handle. |
| 329 | */ |
| 330 | int ocfs2_extend_trans(struct ocfs2_journal_handle *handle, |
| 331 | int nblocks) |
| 332 | { |
| 333 | int status; |
| 334 | |
| 335 | BUG_ON(!handle); |
| 336 | BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED)); |
| 337 | BUG_ON(!nblocks); |
| 338 | |
| 339 | mlog_entry_void(); |
| 340 | |
| 341 | mlog(0, "Trying to extend transaction by %d blocks\n", nblocks); |
| 342 | |
| 343 | status = journal_extend(handle->k_handle, nblocks); |
| 344 | if (status < 0) { |
| 345 | mlog_errno(status); |
| 346 | goto bail; |
| 347 | } |
| 348 | |
| 349 | if (status > 0) { |
| 350 | mlog(0, "journal_extend failed, trying journal_restart\n"); |
| 351 | status = journal_restart(handle->k_handle, nblocks); |
| 352 | if (status < 0) { |
| 353 | handle->k_handle = NULL; |
| 354 | mlog_errno(status); |
| 355 | goto bail; |
| 356 | } |
| 357 | handle->max_buffs = nblocks; |
| 358 | } else |
| 359 | handle->max_buffs += nblocks; |
| 360 | |
| 361 | status = 0; |
| 362 | bail: |
| 363 | |
| 364 | mlog_exit(status); |
| 365 | return status; |
| 366 | } |
| 367 | |
| 368 | int ocfs2_journal_access(struct ocfs2_journal_handle *handle, |
| 369 | struct inode *inode, |
| 370 | struct buffer_head *bh, |
| 371 | int type) |
| 372 | { |
| 373 | int status; |
| 374 | |
| 375 | BUG_ON(!inode); |
| 376 | BUG_ON(!handle); |
| 377 | BUG_ON(!bh); |
| 378 | BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED)); |
| 379 | |
Badari Pulavarty | 205f87f | 2006-03-26 01:38:00 -0800 | [diff] [blame] | 380 | mlog_entry("bh->b_blocknr=%llu, type=%d (\"%s\"), bh->b_size = %zu\n", |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 381 | (unsigned long long)bh->b_blocknr, type, |
| 382 | (type == OCFS2_JOURNAL_ACCESS_CREATE) ? |
| 383 | "OCFS2_JOURNAL_ACCESS_CREATE" : |
| 384 | "OCFS2_JOURNAL_ACCESS_WRITE", |
| 385 | bh->b_size); |
| 386 | |
| 387 | /* we can safely remove this assertion after testing. */ |
| 388 | if (!buffer_uptodate(bh)) { |
| 389 | mlog(ML_ERROR, "giving me a buffer that's not uptodate!\n"); |
| 390 | mlog(ML_ERROR, "b_blocknr=%llu\n", |
| 391 | (unsigned long long)bh->b_blocknr); |
| 392 | BUG(); |
| 393 | } |
| 394 | |
| 395 | /* Set the current transaction information on the inode so |
| 396 | * that the locking code knows whether it can drop it's locks |
| 397 | * on this inode or not. We're protected from the commit |
| 398 | * thread updating the current transaction id until |
| 399 | * ocfs2_commit_trans() because ocfs2_start_trans() took |
| 400 | * j_trans_barrier for us. */ |
| 401 | ocfs2_set_inode_lock_trans(OCFS2_SB(inode->i_sb)->journal, inode); |
| 402 | |
Mark Fasheh | 251b6ec | 2006-01-10 15:41:43 -0800 | [diff] [blame] | 403 | mutex_lock(&OCFS2_I(inode)->ip_io_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 404 | switch (type) { |
| 405 | case OCFS2_JOURNAL_ACCESS_CREATE: |
| 406 | case OCFS2_JOURNAL_ACCESS_WRITE: |
| 407 | status = journal_get_write_access(handle->k_handle, bh); |
| 408 | break; |
| 409 | |
| 410 | case OCFS2_JOURNAL_ACCESS_UNDO: |
| 411 | status = journal_get_undo_access(handle->k_handle, bh); |
| 412 | break; |
| 413 | |
| 414 | default: |
| 415 | status = -EINVAL; |
| 416 | mlog(ML_ERROR, "Uknown access type!\n"); |
| 417 | } |
Mark Fasheh | 251b6ec | 2006-01-10 15:41:43 -0800 | [diff] [blame] | 418 | mutex_unlock(&OCFS2_I(inode)->ip_io_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 419 | |
| 420 | if (status < 0) |
| 421 | mlog(ML_ERROR, "Error %d getting %d access to buffer!\n", |
| 422 | status, type); |
| 423 | |
| 424 | mlog_exit(status); |
| 425 | return status; |
| 426 | } |
| 427 | |
| 428 | int ocfs2_journal_dirty(struct ocfs2_journal_handle *handle, |
| 429 | struct buffer_head *bh) |
| 430 | { |
| 431 | int status; |
| 432 | |
| 433 | BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED)); |
| 434 | |
| 435 | mlog_entry("(bh->b_blocknr=%llu)\n", |
| 436 | (unsigned long long)bh->b_blocknr); |
| 437 | |
| 438 | status = journal_dirty_metadata(handle->k_handle, bh); |
| 439 | if (status < 0) |
| 440 | mlog(ML_ERROR, "Could not dirty metadata buffer. " |
| 441 | "(bh->b_blocknr=%llu)\n", |
| 442 | (unsigned long long)bh->b_blocknr); |
| 443 | |
| 444 | mlog_exit(status); |
| 445 | return status; |
| 446 | } |
| 447 | |
| 448 | int ocfs2_journal_dirty_data(handle_t *handle, |
| 449 | struct buffer_head *bh) |
| 450 | { |
| 451 | int err = journal_dirty_data(handle, bh); |
| 452 | if (err) |
| 453 | mlog_errno(err); |
| 454 | /* TODO: When we can handle it, abort the handle and go RO on |
| 455 | * error here. */ |
| 456 | |
| 457 | return err; |
| 458 | } |
| 459 | |
| 460 | /* We always assume you're adding a metadata lock at level 'ex' */ |
| 461 | int ocfs2_handle_add_lock(struct ocfs2_journal_handle *handle, |
| 462 | struct inode *inode) |
| 463 | { |
| 464 | int status; |
| 465 | struct ocfs2_journal_lock *lock; |
| 466 | |
| 467 | BUG_ON(!inode); |
| 468 | |
| 469 | lock = kmem_cache_alloc(ocfs2_lock_cache, GFP_NOFS); |
| 470 | if (!lock) { |
| 471 | status = -ENOMEM; |
| 472 | mlog_errno(-ENOMEM); |
| 473 | goto bail; |
| 474 | } |
| 475 | |
| 476 | if (!igrab(inode)) |
| 477 | BUG(); |
| 478 | lock->jl_inode = inode; |
| 479 | |
| 480 | list_add_tail(&(lock->jl_lock_list), &(handle->locks)); |
| 481 | handle->num_locks++; |
| 482 | |
| 483 | status = 0; |
| 484 | bail: |
| 485 | mlog_exit(status); |
| 486 | return status; |
| 487 | } |
| 488 | |
| 489 | static void ocfs2_handle_cleanup_locks(struct ocfs2_journal *journal, |
| 490 | struct ocfs2_journal_handle *handle) |
| 491 | { |
| 492 | struct list_head *p, *n; |
| 493 | struct ocfs2_journal_lock *lock; |
| 494 | struct inode *inode; |
| 495 | |
| 496 | list_for_each_safe(p, n, &(handle->locks)) { |
| 497 | lock = list_entry(p, struct ocfs2_journal_lock, |
| 498 | jl_lock_list); |
| 499 | list_del(&lock->jl_lock_list); |
| 500 | handle->num_locks--; |
| 501 | |
| 502 | inode = lock->jl_inode; |
| 503 | ocfs2_meta_unlock(inode, 1); |
| 504 | if (atomic_read(&inode->i_count) == 1) |
| 505 | mlog(ML_ERROR, |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 506 | "Inode %llu, I'm doing a last iput for!", |
| 507 | (unsigned long long)OCFS2_I(inode)->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 508 | iput(inode); |
| 509 | kmem_cache_free(ocfs2_lock_cache, lock); |
| 510 | } |
| 511 | } |
| 512 | |
| 513 | #define OCFS2_DEFAULT_COMMIT_INTERVAL (HZ * 5) |
| 514 | |
| 515 | void ocfs2_set_journal_params(struct ocfs2_super *osb) |
| 516 | { |
| 517 | journal_t *journal = osb->journal->j_journal; |
| 518 | |
| 519 | spin_lock(&journal->j_state_lock); |
| 520 | journal->j_commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL; |
| 521 | if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) |
| 522 | journal->j_flags |= JFS_BARRIER; |
| 523 | else |
| 524 | journal->j_flags &= ~JFS_BARRIER; |
| 525 | spin_unlock(&journal->j_state_lock); |
| 526 | } |
| 527 | |
| 528 | int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty) |
| 529 | { |
| 530 | int status = -1; |
| 531 | struct inode *inode = NULL; /* the journal inode */ |
| 532 | journal_t *j_journal = NULL; |
| 533 | struct ocfs2_dinode *di = NULL; |
| 534 | struct buffer_head *bh = NULL; |
| 535 | struct ocfs2_super *osb; |
| 536 | int meta_lock = 0; |
| 537 | |
| 538 | mlog_entry_void(); |
| 539 | |
| 540 | BUG_ON(!journal); |
| 541 | |
| 542 | osb = journal->j_osb; |
| 543 | |
| 544 | /* already have the inode for our journal */ |
| 545 | inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, |
| 546 | osb->slot_num); |
| 547 | if (inode == NULL) { |
| 548 | status = -EACCES; |
| 549 | mlog_errno(status); |
| 550 | goto done; |
| 551 | } |
| 552 | if (is_bad_inode(inode)) { |
| 553 | mlog(ML_ERROR, "access error (bad inode)\n"); |
| 554 | iput(inode); |
| 555 | inode = NULL; |
| 556 | status = -EACCES; |
| 557 | goto done; |
| 558 | } |
| 559 | |
| 560 | SET_INODE_JOURNAL(inode); |
| 561 | OCFS2_I(inode)->ip_open_count++; |
| 562 | |
Mark Fasheh | 6eff579 | 2006-01-18 10:31:47 -0800 | [diff] [blame] | 563 | /* Skip recovery waits here - journal inode metadata never |
| 564 | * changes in a live cluster so it can be considered an |
| 565 | * exception to the rule. */ |
| 566 | status = ocfs2_meta_lock_full(inode, NULL, &bh, 1, |
| 567 | OCFS2_META_LOCK_RECOVERY); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 568 | if (status < 0) { |
| 569 | if (status != -ERESTARTSYS) |
| 570 | mlog(ML_ERROR, "Could not get lock on journal!\n"); |
| 571 | goto done; |
| 572 | } |
| 573 | |
| 574 | meta_lock = 1; |
| 575 | di = (struct ocfs2_dinode *)bh->b_data; |
| 576 | |
| 577 | if (inode->i_size < OCFS2_MIN_JOURNAL_SIZE) { |
| 578 | mlog(ML_ERROR, "Journal file size (%lld) is too small!\n", |
| 579 | inode->i_size); |
| 580 | status = -EINVAL; |
| 581 | goto done; |
| 582 | } |
| 583 | |
| 584 | mlog(0, "inode->i_size = %lld\n", inode->i_size); |
Andrew Morton | 5515eff | 2006-03-26 01:37:53 -0800 | [diff] [blame] | 585 | mlog(0, "inode->i_blocks = %llu\n", |
| 586 | (unsigned long long)inode->i_blocks); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 587 | mlog(0, "inode->ip_clusters = %u\n", OCFS2_I(inode)->ip_clusters); |
| 588 | |
| 589 | /* call the kernels journal init function now */ |
| 590 | j_journal = journal_init_inode(inode); |
| 591 | if (j_journal == NULL) { |
| 592 | mlog(ML_ERROR, "Linux journal layer error\n"); |
| 593 | status = -EINVAL; |
| 594 | goto done; |
| 595 | } |
| 596 | |
| 597 | mlog(0, "Returned from journal_init_inode\n"); |
| 598 | mlog(0, "j_journal->j_maxlen = %u\n", j_journal->j_maxlen); |
| 599 | |
| 600 | *dirty = (le32_to_cpu(di->id1.journal1.ij_flags) & |
| 601 | OCFS2_JOURNAL_DIRTY_FL); |
| 602 | |
| 603 | journal->j_journal = j_journal; |
| 604 | journal->j_inode = inode; |
| 605 | journal->j_bh = bh; |
| 606 | |
| 607 | ocfs2_set_journal_params(osb); |
| 608 | |
| 609 | journal->j_state = OCFS2_JOURNAL_LOADED; |
| 610 | |
| 611 | status = 0; |
| 612 | done: |
| 613 | if (status < 0) { |
| 614 | if (meta_lock) |
| 615 | ocfs2_meta_unlock(inode, 1); |
| 616 | if (bh != NULL) |
| 617 | brelse(bh); |
| 618 | if (inode) { |
| 619 | OCFS2_I(inode)->ip_open_count--; |
| 620 | iput(inode); |
| 621 | } |
| 622 | } |
| 623 | |
| 624 | mlog_exit(status); |
| 625 | return status; |
| 626 | } |
| 627 | |
| 628 | static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb, |
| 629 | int dirty) |
| 630 | { |
| 631 | int status; |
| 632 | unsigned int flags; |
| 633 | struct ocfs2_journal *journal = osb->journal; |
| 634 | struct buffer_head *bh = journal->j_bh; |
| 635 | struct ocfs2_dinode *fe; |
| 636 | |
| 637 | mlog_entry_void(); |
| 638 | |
| 639 | fe = (struct ocfs2_dinode *)bh->b_data; |
| 640 | if (!OCFS2_IS_VALID_DINODE(fe)) { |
| 641 | /* This is called from startup/shutdown which will |
| 642 | * handle the errors in a specific manner, so no need |
| 643 | * to call ocfs2_error() here. */ |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 644 | mlog(ML_ERROR, "Journal dinode %llu has invalid " |
| 645 | "signature: %.*s", (unsigned long long)fe->i_blkno, 7, |
| 646 | fe->i_signature); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 647 | status = -EIO; |
| 648 | goto out; |
| 649 | } |
| 650 | |
| 651 | flags = le32_to_cpu(fe->id1.journal1.ij_flags); |
| 652 | if (dirty) |
| 653 | flags |= OCFS2_JOURNAL_DIRTY_FL; |
| 654 | else |
| 655 | flags &= ~OCFS2_JOURNAL_DIRTY_FL; |
| 656 | fe->id1.journal1.ij_flags = cpu_to_le32(flags); |
| 657 | |
| 658 | status = ocfs2_write_block(osb, bh, journal->j_inode); |
| 659 | if (status < 0) |
| 660 | mlog_errno(status); |
| 661 | |
| 662 | out: |
| 663 | mlog_exit(status); |
| 664 | return status; |
| 665 | } |
| 666 | |
| 667 | /* |
| 668 | * If the journal has been kmalloc'd it needs to be freed after this |
| 669 | * call. |
| 670 | */ |
| 671 | void ocfs2_journal_shutdown(struct ocfs2_super *osb) |
| 672 | { |
| 673 | struct ocfs2_journal *journal = NULL; |
| 674 | int status = 0; |
| 675 | struct inode *inode = NULL; |
| 676 | int num_running_trans = 0; |
| 677 | |
| 678 | mlog_entry_void(); |
| 679 | |
Eric Sesterhenn / snakebyte | ebdec83 | 2006-01-27 10:32:52 +0100 | [diff] [blame] | 680 | BUG_ON(!osb); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 681 | |
| 682 | journal = osb->journal; |
| 683 | if (!journal) |
| 684 | goto done; |
| 685 | |
| 686 | inode = journal->j_inode; |
| 687 | |
| 688 | if (journal->j_state != OCFS2_JOURNAL_LOADED) |
| 689 | goto done; |
| 690 | |
| 691 | /* need to inc inode use count as journal_destroy will iput. */ |
| 692 | if (!igrab(inode)) |
| 693 | BUG(); |
| 694 | |
| 695 | num_running_trans = atomic_read(&(osb->journal->j_num_trans)); |
| 696 | if (num_running_trans > 0) |
| 697 | mlog(0, "Shutting down journal: must wait on %d " |
| 698 | "running transactions!\n", |
| 699 | num_running_trans); |
| 700 | |
| 701 | /* Do a commit_cache here. It will flush our journal, *and* |
| 702 | * release any locks that are still held. |
| 703 | * set the SHUTDOWN flag and release the trans lock. |
| 704 | * the commit thread will take the trans lock for us below. */ |
| 705 | journal->j_state = OCFS2_JOURNAL_IN_SHUTDOWN; |
| 706 | |
| 707 | /* The OCFS2_JOURNAL_IN_SHUTDOWN will signal to commit_cache to not |
| 708 | * drop the trans_lock (which we want to hold until we |
| 709 | * completely destroy the journal. */ |
| 710 | if (osb->commit_task) { |
| 711 | /* Wait for the commit thread */ |
| 712 | mlog(0, "Waiting for ocfs2commit to exit....\n"); |
| 713 | kthread_stop(osb->commit_task); |
| 714 | osb->commit_task = NULL; |
| 715 | } |
| 716 | |
| 717 | BUG_ON(atomic_read(&(osb->journal->j_num_trans)) != 0); |
| 718 | |
| 719 | status = ocfs2_journal_toggle_dirty(osb, 0); |
| 720 | if (status < 0) |
| 721 | mlog_errno(status); |
| 722 | |
| 723 | /* Shutdown the kernel journal system */ |
| 724 | journal_destroy(journal->j_journal); |
| 725 | |
| 726 | OCFS2_I(inode)->ip_open_count--; |
| 727 | |
| 728 | /* unlock our journal */ |
| 729 | ocfs2_meta_unlock(inode, 1); |
| 730 | |
| 731 | brelse(journal->j_bh); |
| 732 | journal->j_bh = NULL; |
| 733 | |
| 734 | journal->j_state = OCFS2_JOURNAL_FREE; |
| 735 | |
| 736 | // up_write(&journal->j_trans_barrier); |
| 737 | done: |
| 738 | if (inode) |
| 739 | iput(inode); |
| 740 | mlog_exit_void(); |
| 741 | } |
| 742 | |
| 743 | static void ocfs2_clear_journal_error(struct super_block *sb, |
| 744 | journal_t *journal, |
| 745 | int slot) |
| 746 | { |
| 747 | int olderr; |
| 748 | |
| 749 | olderr = journal_errno(journal); |
| 750 | if (olderr) { |
| 751 | mlog(ML_ERROR, "File system error %d recorded in " |
| 752 | "journal %u.\n", olderr, slot); |
| 753 | mlog(ML_ERROR, "File system on device %s needs checking.\n", |
| 754 | sb->s_id); |
| 755 | |
| 756 | journal_ack_err(journal); |
| 757 | journal_clear_err(journal); |
| 758 | } |
| 759 | } |
| 760 | |
| 761 | int ocfs2_journal_load(struct ocfs2_journal *journal) |
| 762 | { |
| 763 | int status = 0; |
| 764 | struct ocfs2_super *osb; |
| 765 | |
| 766 | mlog_entry_void(); |
| 767 | |
| 768 | if (!journal) |
| 769 | BUG(); |
| 770 | |
| 771 | osb = journal->j_osb; |
| 772 | |
| 773 | status = journal_load(journal->j_journal); |
| 774 | if (status < 0) { |
| 775 | mlog(ML_ERROR, "Failed to load journal!\n"); |
| 776 | goto done; |
| 777 | } |
| 778 | |
| 779 | ocfs2_clear_journal_error(osb->sb, journal->j_journal, osb->slot_num); |
| 780 | |
| 781 | status = ocfs2_journal_toggle_dirty(osb, 1); |
| 782 | if (status < 0) { |
| 783 | mlog_errno(status); |
| 784 | goto done; |
| 785 | } |
| 786 | |
| 787 | /* Launch the commit thread */ |
| 788 | osb->commit_task = kthread_run(ocfs2_commit_thread, osb, "ocfs2cmt-%d", |
| 789 | osb->osb_id); |
| 790 | if (IS_ERR(osb->commit_task)) { |
| 791 | status = PTR_ERR(osb->commit_task); |
| 792 | osb->commit_task = NULL; |
| 793 | mlog(ML_ERROR, "unable to launch ocfs2commit thread, error=%d", |
| 794 | status); |
| 795 | goto done; |
| 796 | } |
| 797 | |
| 798 | done: |
| 799 | mlog_exit(status); |
| 800 | return status; |
| 801 | } |
| 802 | |
| 803 | |
| 804 | /* 'full' flag tells us whether we clear out all blocks or if we just |
| 805 | * mark the journal clean */ |
| 806 | int ocfs2_journal_wipe(struct ocfs2_journal *journal, int full) |
| 807 | { |
| 808 | int status; |
| 809 | |
| 810 | mlog_entry_void(); |
| 811 | |
Eric Sesterhenn / snakebyte | ebdec83 | 2006-01-27 10:32:52 +0100 | [diff] [blame] | 812 | BUG_ON(!journal); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 813 | |
| 814 | status = journal_wipe(journal->j_journal, full); |
| 815 | if (status < 0) { |
| 816 | mlog_errno(status); |
| 817 | goto bail; |
| 818 | } |
| 819 | |
| 820 | status = ocfs2_journal_toggle_dirty(journal->j_osb, 0); |
| 821 | if (status < 0) |
| 822 | mlog_errno(status); |
| 823 | |
| 824 | bail: |
| 825 | mlog_exit(status); |
| 826 | return status; |
| 827 | } |
| 828 | |
| 829 | /* |
| 830 | * JBD Might read a cached version of another nodes journal file. We |
| 831 | * don't want this as this file changes often and we get no |
| 832 | * notification on those changes. The only way to be sure that we've |
| 833 | * got the most up to date version of those blocks then is to force |
| 834 | * read them off disk. Just searching through the buffer cache won't |
| 835 | * work as there may be pages backing this file which are still marked |
| 836 | * up to date. We know things can't change on this file underneath us |
| 837 | * as we have the lock by now :) |
| 838 | */ |
| 839 | static int ocfs2_force_read_journal(struct inode *inode) |
| 840 | { |
| 841 | int status = 0; |
| 842 | int i, p_blocks; |
| 843 | u64 v_blkno, p_blkno; |
| 844 | #define CONCURRENT_JOURNAL_FILL 32 |
| 845 | struct buffer_head *bhs[CONCURRENT_JOURNAL_FILL]; |
| 846 | |
| 847 | mlog_entry_void(); |
| 848 | |
| 849 | BUG_ON(inode->i_blocks != |
| 850 | ocfs2_align_bytes_to_sectors(i_size_read(inode))); |
| 851 | |
| 852 | memset(bhs, 0, sizeof(struct buffer_head *) * CONCURRENT_JOURNAL_FILL); |
| 853 | |
Andrew Morton | 5515eff | 2006-03-26 01:37:53 -0800 | [diff] [blame] | 854 | mlog(0, "Force reading %llu blocks\n", |
| 855 | (unsigned long long)(inode->i_blocks >> |
| 856 | (inode->i_sb->s_blocksize_bits - 9))); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 857 | |
| 858 | v_blkno = 0; |
| 859 | while (v_blkno < |
| 860 | (inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9))) { |
| 861 | |
| 862 | status = ocfs2_extent_map_get_blocks(inode, v_blkno, |
| 863 | 1, &p_blkno, |
| 864 | &p_blocks); |
| 865 | if (status < 0) { |
| 866 | mlog_errno(status); |
| 867 | goto bail; |
| 868 | } |
| 869 | |
| 870 | if (p_blocks > CONCURRENT_JOURNAL_FILL) |
| 871 | p_blocks = CONCURRENT_JOURNAL_FILL; |
| 872 | |
Mark Fasheh | dd4a2c2 | 2006-04-12 14:24:05 -0700 | [diff] [blame] | 873 | /* We are reading journal data which should not |
| 874 | * be put in the uptodate cache */ |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 875 | status = ocfs2_read_blocks(OCFS2_SB(inode->i_sb), |
| 876 | p_blkno, p_blocks, bhs, 0, |
Mark Fasheh | dd4a2c2 | 2006-04-12 14:24:05 -0700 | [diff] [blame] | 877 | NULL); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 878 | if (status < 0) { |
| 879 | mlog_errno(status); |
| 880 | goto bail; |
| 881 | } |
| 882 | |
| 883 | for(i = 0; i < p_blocks; i++) { |
| 884 | brelse(bhs[i]); |
| 885 | bhs[i] = NULL; |
| 886 | } |
| 887 | |
| 888 | v_blkno += p_blocks; |
| 889 | } |
| 890 | |
| 891 | bail: |
| 892 | for(i = 0; i < CONCURRENT_JOURNAL_FILL; i++) |
| 893 | if (bhs[i]) |
| 894 | brelse(bhs[i]); |
| 895 | mlog_exit(status); |
| 896 | return status; |
| 897 | } |
| 898 | |
| 899 | struct ocfs2_la_recovery_item { |
| 900 | struct list_head lri_list; |
| 901 | int lri_slot; |
| 902 | struct ocfs2_dinode *lri_la_dinode; |
| 903 | struct ocfs2_dinode *lri_tl_dinode; |
| 904 | }; |
| 905 | |
| 906 | /* Does the second half of the recovery process. By this point, the |
| 907 | * node is marked clean and can actually be considered recovered, |
| 908 | * hence it's no longer in the recovery map, but there's still some |
| 909 | * cleanup we can do which shouldn't happen within the recovery thread |
| 910 | * as locking in that context becomes very difficult if we are to take |
| 911 | * recovering nodes into account. |
| 912 | * |
| 913 | * NOTE: This function can and will sleep on recovery of other nodes |
| 914 | * during cluster locking, just like any other ocfs2 process. |
| 915 | */ |
| 916 | void ocfs2_complete_recovery(void *data) |
| 917 | { |
| 918 | int ret; |
| 919 | struct ocfs2_super *osb = data; |
| 920 | struct ocfs2_journal *journal = osb->journal; |
| 921 | struct ocfs2_dinode *la_dinode, *tl_dinode; |
| 922 | struct ocfs2_la_recovery_item *item; |
| 923 | struct list_head *p, *n; |
| 924 | LIST_HEAD(tmp_la_list); |
| 925 | |
| 926 | mlog_entry_void(); |
| 927 | |
| 928 | mlog(0, "completing recovery from keventd\n"); |
| 929 | |
| 930 | spin_lock(&journal->j_lock); |
| 931 | list_splice_init(&journal->j_la_cleanups, &tmp_la_list); |
| 932 | spin_unlock(&journal->j_lock); |
| 933 | |
| 934 | list_for_each_safe(p, n, &tmp_la_list) { |
| 935 | item = list_entry(p, struct ocfs2_la_recovery_item, lri_list); |
| 936 | list_del_init(&item->lri_list); |
| 937 | |
| 938 | mlog(0, "Complete recovery for slot %d\n", item->lri_slot); |
| 939 | |
| 940 | la_dinode = item->lri_la_dinode; |
| 941 | if (la_dinode) { |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 942 | mlog(0, "Clean up local alloc %llu\n", |
| 943 | (unsigned long long)la_dinode->i_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 944 | |
| 945 | ret = ocfs2_complete_local_alloc_recovery(osb, |
| 946 | la_dinode); |
| 947 | if (ret < 0) |
| 948 | mlog_errno(ret); |
| 949 | |
| 950 | kfree(la_dinode); |
| 951 | } |
| 952 | |
| 953 | tl_dinode = item->lri_tl_dinode; |
| 954 | if (tl_dinode) { |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 955 | mlog(0, "Clean up truncate log %llu\n", |
| 956 | (unsigned long long)tl_dinode->i_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 957 | |
| 958 | ret = ocfs2_complete_truncate_log_recovery(osb, |
| 959 | tl_dinode); |
| 960 | if (ret < 0) |
| 961 | mlog_errno(ret); |
| 962 | |
| 963 | kfree(tl_dinode); |
| 964 | } |
| 965 | |
| 966 | ret = ocfs2_recover_orphans(osb, item->lri_slot); |
| 967 | if (ret < 0) |
| 968 | mlog_errno(ret); |
| 969 | |
| 970 | kfree(item); |
| 971 | } |
| 972 | |
| 973 | mlog(0, "Recovery completion\n"); |
| 974 | mlog_exit_void(); |
| 975 | } |
| 976 | |
| 977 | /* NOTE: This function always eats your references to la_dinode and |
| 978 | * tl_dinode, either manually on error, or by passing them to |
| 979 | * ocfs2_complete_recovery */ |
| 980 | static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal, |
| 981 | int slot_num, |
| 982 | struct ocfs2_dinode *la_dinode, |
| 983 | struct ocfs2_dinode *tl_dinode) |
| 984 | { |
| 985 | struct ocfs2_la_recovery_item *item; |
| 986 | |
Sunil Mushran | afae00ab | 2006-04-12 14:37:00 -0700 | [diff] [blame] | 987 | item = kmalloc(sizeof(struct ocfs2_la_recovery_item), GFP_NOFS); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 988 | if (!item) { |
| 989 | /* Though we wish to avoid it, we are in fact safe in |
| 990 | * skipping local alloc cleanup as fsck.ocfs2 is more |
| 991 | * than capable of reclaiming unused space. */ |
| 992 | if (la_dinode) |
| 993 | kfree(la_dinode); |
| 994 | |
| 995 | if (tl_dinode) |
| 996 | kfree(tl_dinode); |
| 997 | |
| 998 | mlog_errno(-ENOMEM); |
| 999 | return; |
| 1000 | } |
| 1001 | |
| 1002 | INIT_LIST_HEAD(&item->lri_list); |
| 1003 | item->lri_la_dinode = la_dinode; |
| 1004 | item->lri_slot = slot_num; |
| 1005 | item->lri_tl_dinode = tl_dinode; |
| 1006 | |
| 1007 | spin_lock(&journal->j_lock); |
| 1008 | list_add_tail(&item->lri_list, &journal->j_la_cleanups); |
| 1009 | queue_work(ocfs2_wq, &journal->j_recovery_work); |
| 1010 | spin_unlock(&journal->j_lock); |
| 1011 | } |
| 1012 | |
| 1013 | /* Called by the mount code to queue recovery the last part of |
| 1014 | * recovery for it's own slot. */ |
| 1015 | void ocfs2_complete_mount_recovery(struct ocfs2_super *osb) |
| 1016 | { |
| 1017 | struct ocfs2_journal *journal = osb->journal; |
| 1018 | |
| 1019 | if (osb->dirty) { |
| 1020 | /* No need to queue up our truncate_log as regular |
| 1021 | * cleanup will catch that. */ |
| 1022 | ocfs2_queue_recovery_completion(journal, |
| 1023 | osb->slot_num, |
| 1024 | osb->local_alloc_copy, |
| 1025 | NULL); |
| 1026 | ocfs2_schedule_truncate_log_flush(osb, 0); |
| 1027 | |
| 1028 | osb->local_alloc_copy = NULL; |
| 1029 | osb->dirty = 0; |
| 1030 | } |
| 1031 | } |
| 1032 | |
| 1033 | static int __ocfs2_recovery_thread(void *arg) |
| 1034 | { |
| 1035 | int status, node_num; |
| 1036 | struct ocfs2_super *osb = arg; |
| 1037 | |
| 1038 | mlog_entry_void(); |
| 1039 | |
| 1040 | status = ocfs2_wait_on_mount(osb); |
| 1041 | if (status < 0) { |
| 1042 | goto bail; |
| 1043 | } |
| 1044 | |
| 1045 | restart: |
| 1046 | status = ocfs2_super_lock(osb, 1); |
| 1047 | if (status < 0) { |
| 1048 | mlog_errno(status); |
| 1049 | goto bail; |
| 1050 | } |
| 1051 | |
| 1052 | while(!ocfs2_node_map_is_empty(osb, &osb->recovery_map)) { |
| 1053 | node_num = ocfs2_node_map_first_set_bit(osb, |
| 1054 | &osb->recovery_map); |
| 1055 | if (node_num == O2NM_INVALID_NODE_NUM) { |
| 1056 | mlog(0, "Out of nodes to recover.\n"); |
| 1057 | break; |
| 1058 | } |
| 1059 | |
| 1060 | status = ocfs2_recover_node(osb, node_num); |
| 1061 | if (status < 0) { |
| 1062 | mlog(ML_ERROR, |
| 1063 | "Error %d recovering node %d on device (%u,%u)!\n", |
| 1064 | status, node_num, |
| 1065 | MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); |
| 1066 | mlog(ML_ERROR, "Volume requires unmount.\n"); |
| 1067 | continue; |
| 1068 | } |
| 1069 | |
| 1070 | ocfs2_recovery_map_clear(osb, node_num); |
| 1071 | } |
| 1072 | ocfs2_super_unlock(osb, 1); |
| 1073 | |
| 1074 | /* We always run recovery on our own orphan dir - the dead |
| 1075 | * node(s) may have voted "no" on an inode delete earlier. A |
| 1076 | * revote is therefore required. */ |
| 1077 | ocfs2_queue_recovery_completion(osb->journal, osb->slot_num, NULL, |
| 1078 | NULL); |
| 1079 | |
| 1080 | bail: |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 1081 | mutex_lock(&osb->recovery_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1082 | if (!status && |
| 1083 | !ocfs2_node_map_is_empty(osb, &osb->recovery_map)) { |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 1084 | mutex_unlock(&osb->recovery_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1085 | goto restart; |
| 1086 | } |
| 1087 | |
| 1088 | osb->recovery_thread_task = NULL; |
| 1089 | mb(); /* sync with ocfs2_recovery_thread_running */ |
| 1090 | wake_up(&osb->recovery_event); |
| 1091 | |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 1092 | mutex_unlock(&osb->recovery_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1093 | |
| 1094 | mlog_exit(status); |
| 1095 | /* no one is callint kthread_stop() for us so the kthread() api |
| 1096 | * requires that we call do_exit(). And it isn't exported, but |
| 1097 | * complete_and_exit() seems to be a minimal wrapper around it. */ |
| 1098 | complete_and_exit(NULL, status); |
| 1099 | return status; |
| 1100 | } |
| 1101 | |
| 1102 | void ocfs2_recovery_thread(struct ocfs2_super *osb, int node_num) |
| 1103 | { |
| 1104 | mlog_entry("(node_num=%d, osb->node_num = %d)\n", |
| 1105 | node_num, osb->node_num); |
| 1106 | |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 1107 | mutex_lock(&osb->recovery_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1108 | if (osb->disable_recovery) |
| 1109 | goto out; |
| 1110 | |
| 1111 | /* People waiting on recovery will wait on |
| 1112 | * the recovery map to empty. */ |
| 1113 | if (!ocfs2_recovery_map_set(osb, node_num)) |
| 1114 | mlog(0, "node %d already be in recovery.\n", node_num); |
| 1115 | |
| 1116 | mlog(0, "starting recovery thread...\n"); |
| 1117 | |
| 1118 | if (osb->recovery_thread_task) |
| 1119 | goto out; |
| 1120 | |
| 1121 | osb->recovery_thread_task = kthread_run(__ocfs2_recovery_thread, osb, |
| 1122 | "ocfs2rec-%d", osb->osb_id); |
| 1123 | if (IS_ERR(osb->recovery_thread_task)) { |
| 1124 | mlog_errno((int)PTR_ERR(osb->recovery_thread_task)); |
| 1125 | osb->recovery_thread_task = NULL; |
| 1126 | } |
| 1127 | |
| 1128 | out: |
Arjan van de Ven | c74ec2f | 2006-01-13 21:54:23 -0800 | [diff] [blame] | 1129 | mutex_unlock(&osb->recovery_lock); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1130 | wake_up(&osb->recovery_event); |
| 1131 | |
| 1132 | mlog_exit_void(); |
| 1133 | } |
| 1134 | |
| 1135 | /* Does the actual journal replay and marks the journal inode as |
| 1136 | * clean. Will only replay if the journal inode is marked dirty. */ |
| 1137 | static int ocfs2_replay_journal(struct ocfs2_super *osb, |
| 1138 | int node_num, |
| 1139 | int slot_num) |
| 1140 | { |
| 1141 | int status; |
| 1142 | int got_lock = 0; |
| 1143 | unsigned int flags; |
| 1144 | struct inode *inode = NULL; |
| 1145 | struct ocfs2_dinode *fe; |
| 1146 | journal_t *journal = NULL; |
| 1147 | struct buffer_head *bh = NULL; |
| 1148 | |
| 1149 | inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, |
| 1150 | slot_num); |
| 1151 | if (inode == NULL) { |
| 1152 | status = -EACCES; |
| 1153 | mlog_errno(status); |
| 1154 | goto done; |
| 1155 | } |
| 1156 | if (is_bad_inode(inode)) { |
| 1157 | status = -EACCES; |
| 1158 | iput(inode); |
| 1159 | inode = NULL; |
| 1160 | mlog_errno(status); |
| 1161 | goto done; |
| 1162 | } |
| 1163 | SET_INODE_JOURNAL(inode); |
| 1164 | |
| 1165 | status = ocfs2_meta_lock_full(inode, NULL, &bh, 1, |
| 1166 | OCFS2_META_LOCK_RECOVERY); |
| 1167 | if (status < 0) { |
| 1168 | mlog(0, "status returned from ocfs2_meta_lock=%d\n", status); |
| 1169 | if (status != -ERESTARTSYS) |
| 1170 | mlog(ML_ERROR, "Could not lock journal!\n"); |
| 1171 | goto done; |
| 1172 | } |
| 1173 | got_lock = 1; |
| 1174 | |
| 1175 | fe = (struct ocfs2_dinode *) bh->b_data; |
| 1176 | |
| 1177 | flags = le32_to_cpu(fe->id1.journal1.ij_flags); |
| 1178 | |
| 1179 | if (!(flags & OCFS2_JOURNAL_DIRTY_FL)) { |
| 1180 | mlog(0, "No recovery required for node %d\n", node_num); |
| 1181 | goto done; |
| 1182 | } |
| 1183 | |
| 1184 | mlog(ML_NOTICE, "Recovering node %d from slot %d on device (%u,%u)\n", |
| 1185 | node_num, slot_num, |
| 1186 | MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); |
| 1187 | |
| 1188 | OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); |
| 1189 | |
| 1190 | status = ocfs2_force_read_journal(inode); |
| 1191 | if (status < 0) { |
| 1192 | mlog_errno(status); |
| 1193 | goto done; |
| 1194 | } |
| 1195 | |
| 1196 | mlog(0, "calling journal_init_inode\n"); |
| 1197 | journal = journal_init_inode(inode); |
| 1198 | if (journal == NULL) { |
| 1199 | mlog(ML_ERROR, "Linux journal layer error\n"); |
| 1200 | status = -EIO; |
| 1201 | goto done; |
| 1202 | } |
| 1203 | |
| 1204 | status = journal_load(journal); |
| 1205 | if (status < 0) { |
| 1206 | mlog_errno(status); |
| 1207 | if (!igrab(inode)) |
| 1208 | BUG(); |
| 1209 | journal_destroy(journal); |
| 1210 | goto done; |
| 1211 | } |
| 1212 | |
| 1213 | ocfs2_clear_journal_error(osb->sb, journal, slot_num); |
| 1214 | |
| 1215 | /* wipe the journal */ |
| 1216 | mlog(0, "flushing the journal.\n"); |
| 1217 | journal_lock_updates(journal); |
| 1218 | status = journal_flush(journal); |
| 1219 | journal_unlock_updates(journal); |
| 1220 | if (status < 0) |
| 1221 | mlog_errno(status); |
| 1222 | |
| 1223 | /* This will mark the node clean */ |
| 1224 | flags = le32_to_cpu(fe->id1.journal1.ij_flags); |
| 1225 | flags &= ~OCFS2_JOURNAL_DIRTY_FL; |
| 1226 | fe->id1.journal1.ij_flags = cpu_to_le32(flags); |
| 1227 | |
| 1228 | status = ocfs2_write_block(osb, bh, inode); |
| 1229 | if (status < 0) |
| 1230 | mlog_errno(status); |
| 1231 | |
| 1232 | if (!igrab(inode)) |
| 1233 | BUG(); |
| 1234 | |
| 1235 | journal_destroy(journal); |
| 1236 | |
| 1237 | done: |
| 1238 | /* drop the lock on this nodes journal */ |
| 1239 | if (got_lock) |
| 1240 | ocfs2_meta_unlock(inode, 1); |
| 1241 | |
| 1242 | if (inode) |
| 1243 | iput(inode); |
| 1244 | |
| 1245 | if (bh) |
| 1246 | brelse(bh); |
| 1247 | |
| 1248 | mlog_exit(status); |
| 1249 | return status; |
| 1250 | } |
| 1251 | |
| 1252 | /* |
| 1253 | * Do the most important parts of node recovery: |
| 1254 | * - Replay it's journal |
| 1255 | * - Stamp a clean local allocator file |
| 1256 | * - Stamp a clean truncate log |
| 1257 | * - Mark the node clean |
| 1258 | * |
| 1259 | * If this function completes without error, a node in OCFS2 can be |
| 1260 | * said to have been safely recovered. As a result, failure during the |
| 1261 | * second part of a nodes recovery process (local alloc recovery) is |
| 1262 | * far less concerning. |
| 1263 | */ |
| 1264 | static int ocfs2_recover_node(struct ocfs2_super *osb, |
| 1265 | int node_num) |
| 1266 | { |
| 1267 | int status = 0; |
| 1268 | int slot_num; |
| 1269 | struct ocfs2_slot_info *si = osb->slot_info; |
| 1270 | struct ocfs2_dinode *la_copy = NULL; |
| 1271 | struct ocfs2_dinode *tl_copy = NULL; |
| 1272 | |
| 1273 | mlog_entry("(node_num=%d, osb->node_num = %d)\n", |
| 1274 | node_num, osb->node_num); |
| 1275 | |
| 1276 | mlog(0, "checking node %d\n", node_num); |
| 1277 | |
| 1278 | /* Should not ever be called to recover ourselves -- in that |
| 1279 | * case we should've called ocfs2_journal_load instead. */ |
Eric Sesterhenn / snakebyte | ebdec83 | 2006-01-27 10:32:52 +0100 | [diff] [blame] | 1280 | BUG_ON(osb->node_num == node_num); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1281 | |
| 1282 | slot_num = ocfs2_node_num_to_slot(si, node_num); |
| 1283 | if (slot_num == OCFS2_INVALID_SLOT) { |
| 1284 | status = 0; |
| 1285 | mlog(0, "no slot for this node, so no recovery required.\n"); |
| 1286 | goto done; |
| 1287 | } |
| 1288 | |
| 1289 | mlog(0, "node %d was using slot %d\n", node_num, slot_num); |
| 1290 | |
| 1291 | status = ocfs2_replay_journal(osb, node_num, slot_num); |
| 1292 | if (status < 0) { |
| 1293 | mlog_errno(status); |
| 1294 | goto done; |
| 1295 | } |
| 1296 | |
| 1297 | /* Stamp a clean local alloc file AFTER recovering the journal... */ |
| 1298 | status = ocfs2_begin_local_alloc_recovery(osb, slot_num, &la_copy); |
| 1299 | if (status < 0) { |
| 1300 | mlog_errno(status); |
| 1301 | goto done; |
| 1302 | } |
| 1303 | |
| 1304 | /* An error from begin_truncate_log_recovery is not |
| 1305 | * serious enough to warrant halting the rest of |
| 1306 | * recovery. */ |
| 1307 | status = ocfs2_begin_truncate_log_recovery(osb, slot_num, &tl_copy); |
| 1308 | if (status < 0) |
| 1309 | mlog_errno(status); |
| 1310 | |
| 1311 | /* Likewise, this would be a strange but ultimately not so |
| 1312 | * harmful place to get an error... */ |
| 1313 | ocfs2_clear_slot(si, slot_num); |
| 1314 | status = ocfs2_update_disk_slots(osb, si); |
| 1315 | if (status < 0) |
| 1316 | mlog_errno(status); |
| 1317 | |
| 1318 | /* This will kfree the memory pointed to by la_copy and tl_copy */ |
| 1319 | ocfs2_queue_recovery_completion(osb->journal, slot_num, la_copy, |
| 1320 | tl_copy); |
| 1321 | |
| 1322 | status = 0; |
| 1323 | done: |
| 1324 | |
| 1325 | mlog_exit(status); |
| 1326 | return status; |
| 1327 | } |
| 1328 | |
| 1329 | /* Test node liveness by trylocking his journal. If we get the lock, |
| 1330 | * we drop it here. Return 0 if we got the lock, -EAGAIN if node is |
| 1331 | * still alive (we couldn't get the lock) and < 0 on error. */ |
| 1332 | static int ocfs2_trylock_journal(struct ocfs2_super *osb, |
| 1333 | int slot_num) |
| 1334 | { |
| 1335 | int status, flags; |
| 1336 | struct inode *inode = NULL; |
| 1337 | |
| 1338 | inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, |
| 1339 | slot_num); |
| 1340 | if (inode == NULL) { |
| 1341 | mlog(ML_ERROR, "access error\n"); |
| 1342 | status = -EACCES; |
| 1343 | goto bail; |
| 1344 | } |
| 1345 | if (is_bad_inode(inode)) { |
| 1346 | mlog(ML_ERROR, "access error (bad inode)\n"); |
| 1347 | iput(inode); |
| 1348 | inode = NULL; |
| 1349 | status = -EACCES; |
| 1350 | goto bail; |
| 1351 | } |
| 1352 | SET_INODE_JOURNAL(inode); |
| 1353 | |
| 1354 | flags = OCFS2_META_LOCK_RECOVERY | OCFS2_META_LOCK_NOQUEUE; |
| 1355 | status = ocfs2_meta_lock_full(inode, NULL, NULL, 1, flags); |
| 1356 | if (status < 0) { |
| 1357 | if (status != -EAGAIN) |
| 1358 | mlog_errno(status); |
| 1359 | goto bail; |
| 1360 | } |
| 1361 | |
| 1362 | ocfs2_meta_unlock(inode, 1); |
| 1363 | bail: |
| 1364 | if (inode) |
| 1365 | iput(inode); |
| 1366 | |
| 1367 | return status; |
| 1368 | } |
| 1369 | |
| 1370 | /* Call this underneath ocfs2_super_lock. It also assumes that the |
| 1371 | * slot info struct has been updated from disk. */ |
| 1372 | int ocfs2_mark_dead_nodes(struct ocfs2_super *osb) |
| 1373 | { |
| 1374 | int status, i, node_num; |
| 1375 | struct ocfs2_slot_info *si = osb->slot_info; |
| 1376 | |
| 1377 | /* This is called with the super block cluster lock, so we |
| 1378 | * know that the slot map can't change underneath us. */ |
| 1379 | |
| 1380 | spin_lock(&si->si_lock); |
| 1381 | for(i = 0; i < si->si_num_slots; i++) { |
| 1382 | if (i == osb->slot_num) |
| 1383 | continue; |
| 1384 | if (ocfs2_is_empty_slot(si, i)) |
| 1385 | continue; |
| 1386 | |
| 1387 | node_num = si->si_global_node_nums[i]; |
| 1388 | if (ocfs2_node_map_test_bit(osb, &osb->recovery_map, node_num)) |
| 1389 | continue; |
| 1390 | spin_unlock(&si->si_lock); |
| 1391 | |
| 1392 | /* Ok, we have a slot occupied by another node which |
| 1393 | * is not in the recovery map. We trylock his journal |
| 1394 | * file here to test if he's alive. */ |
| 1395 | status = ocfs2_trylock_journal(osb, i); |
| 1396 | if (!status) { |
| 1397 | /* Since we're called from mount, we know that |
| 1398 | * the recovery thread can't race us on |
| 1399 | * setting / checking the recovery bits. */ |
| 1400 | ocfs2_recovery_thread(osb, node_num); |
| 1401 | } else if ((status < 0) && (status != -EAGAIN)) { |
| 1402 | mlog_errno(status); |
| 1403 | goto bail; |
| 1404 | } |
| 1405 | |
| 1406 | spin_lock(&si->si_lock); |
| 1407 | } |
| 1408 | spin_unlock(&si->si_lock); |
| 1409 | |
| 1410 | status = 0; |
| 1411 | bail: |
| 1412 | mlog_exit(status); |
| 1413 | return status; |
| 1414 | } |
| 1415 | |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1416 | static int ocfs2_queue_orphans(struct ocfs2_super *osb, |
| 1417 | int slot, |
| 1418 | struct inode **head) |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1419 | { |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1420 | int status; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1421 | struct inode *orphan_dir_inode = NULL; |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1422 | struct inode *iter; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1423 | unsigned long offset, blk, local; |
| 1424 | struct buffer_head *bh = NULL; |
| 1425 | struct ocfs2_dir_entry *de; |
| 1426 | struct super_block *sb = osb->sb; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1427 | |
| 1428 | orphan_dir_inode = ocfs2_get_system_file_inode(osb, |
| 1429 | ORPHAN_DIR_SYSTEM_INODE, |
| 1430 | slot); |
| 1431 | if (!orphan_dir_inode) { |
| 1432 | status = -ENOENT; |
| 1433 | mlog_errno(status); |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1434 | return status; |
| 1435 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1436 | |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 1437 | mutex_lock(&orphan_dir_inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1438 | status = ocfs2_meta_lock(orphan_dir_inode, NULL, NULL, 0); |
| 1439 | if (status < 0) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1440 | mlog_errno(status); |
| 1441 | goto out; |
| 1442 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1443 | |
| 1444 | offset = 0; |
| 1445 | iter = NULL; |
| 1446 | while(offset < i_size_read(orphan_dir_inode)) { |
| 1447 | blk = offset >> sb->s_blocksize_bits; |
| 1448 | |
| 1449 | bh = ocfs2_bread(orphan_dir_inode, blk, &status, 0); |
| 1450 | if (!bh) |
| 1451 | status = -EINVAL; |
| 1452 | if (status < 0) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1453 | if (bh) |
| 1454 | brelse(bh); |
| 1455 | mlog_errno(status); |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1456 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1457 | } |
| 1458 | |
| 1459 | local = 0; |
| 1460 | while(offset < i_size_read(orphan_dir_inode) |
| 1461 | && local < sb->s_blocksize) { |
| 1462 | de = (struct ocfs2_dir_entry *) (bh->b_data + local); |
| 1463 | |
| 1464 | if (!ocfs2_check_dir_entry(orphan_dir_inode, |
| 1465 | de, bh, local)) { |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1466 | status = -EINVAL; |
| 1467 | mlog_errno(status); |
| 1468 | brelse(bh); |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1469 | goto out_unlock; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1470 | } |
| 1471 | |
| 1472 | local += le16_to_cpu(de->rec_len); |
| 1473 | offset += le16_to_cpu(de->rec_len); |
| 1474 | |
| 1475 | /* I guess we silently fail on no inode? */ |
| 1476 | if (!le64_to_cpu(de->inode)) |
| 1477 | continue; |
| 1478 | if (de->file_type > OCFS2_FT_MAX) { |
| 1479 | mlog(ML_ERROR, |
| 1480 | "block %llu contains invalid de: " |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1481 | "inode = %llu, rec_len = %u, " |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1482 | "name_len = %u, file_type = %u, " |
| 1483 | "name='%.*s'\n", |
| 1484 | (unsigned long long)bh->b_blocknr, |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1485 | (unsigned long long)le64_to_cpu(de->inode), |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1486 | le16_to_cpu(de->rec_len), |
| 1487 | de->name_len, |
| 1488 | de->file_type, |
| 1489 | de->name_len, |
| 1490 | de->name); |
| 1491 | continue; |
| 1492 | } |
| 1493 | if (de->name_len == 1 && !strncmp(".", de->name, 1)) |
| 1494 | continue; |
| 1495 | if (de->name_len == 2 && !strncmp("..", de->name, 2)) |
| 1496 | continue; |
| 1497 | |
| 1498 | iter = ocfs2_iget(osb, le64_to_cpu(de->inode)); |
| 1499 | if (IS_ERR(iter)) |
| 1500 | continue; |
| 1501 | |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1502 | mlog(0, "queue orphan %llu\n", |
| 1503 | (unsigned long long)OCFS2_I(iter)->ip_blkno); |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1504 | /* No locking is required for the next_orphan |
| 1505 | * queue as there is only ever a single |
| 1506 | * process doing orphan recovery. */ |
| 1507 | OCFS2_I(iter)->ip_next_orphan = *head; |
| 1508 | *head = iter; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1509 | } |
| 1510 | brelse(bh); |
| 1511 | } |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1512 | |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1513 | out_unlock: |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1514 | ocfs2_meta_unlock(orphan_dir_inode, 0); |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1515 | out: |
| 1516 | mutex_unlock(&orphan_dir_inode->i_mutex); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1517 | iput(orphan_dir_inode); |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1518 | return status; |
| 1519 | } |
| 1520 | |
| 1521 | static int ocfs2_orphan_recovery_can_continue(struct ocfs2_super *osb, |
| 1522 | int slot) |
| 1523 | { |
| 1524 | int ret; |
| 1525 | |
| 1526 | spin_lock(&osb->osb_lock); |
| 1527 | ret = !osb->osb_orphan_wipes[slot]; |
| 1528 | spin_unlock(&osb->osb_lock); |
| 1529 | return ret; |
| 1530 | } |
| 1531 | |
| 1532 | static void ocfs2_mark_recovering_orphan_dir(struct ocfs2_super *osb, |
| 1533 | int slot) |
| 1534 | { |
| 1535 | spin_lock(&osb->osb_lock); |
| 1536 | /* Mark ourselves such that new processes in delete_inode() |
| 1537 | * know to quit early. */ |
| 1538 | ocfs2_node_map_set_bit(osb, &osb->osb_recovering_orphan_dirs, slot); |
| 1539 | while (osb->osb_orphan_wipes[slot]) { |
| 1540 | /* If any processes are already in the middle of an |
| 1541 | * orphan wipe on this dir, then we need to wait for |
| 1542 | * them. */ |
| 1543 | spin_unlock(&osb->osb_lock); |
| 1544 | wait_event_interruptible(osb->osb_wipe_event, |
| 1545 | ocfs2_orphan_recovery_can_continue(osb, slot)); |
| 1546 | spin_lock(&osb->osb_lock); |
| 1547 | } |
| 1548 | spin_unlock(&osb->osb_lock); |
| 1549 | } |
| 1550 | |
| 1551 | static void ocfs2_clear_recovering_orphan_dir(struct ocfs2_super *osb, |
| 1552 | int slot) |
| 1553 | { |
| 1554 | ocfs2_node_map_clear_bit(osb, &osb->osb_recovering_orphan_dirs, slot); |
| 1555 | } |
| 1556 | |
| 1557 | /* |
| 1558 | * Orphan recovery. Each mounted node has it's own orphan dir which we |
| 1559 | * must run during recovery. Our strategy here is to build a list of |
| 1560 | * the inodes in the orphan dir and iget/iput them. The VFS does |
| 1561 | * (most) of the rest of the work. |
| 1562 | * |
| 1563 | * Orphan recovery can happen at any time, not just mount so we have a |
| 1564 | * couple of extra considerations. |
| 1565 | * |
| 1566 | * - We grab as many inodes as we can under the orphan dir lock - |
| 1567 | * doing iget() outside the orphan dir risks getting a reference on |
| 1568 | * an invalid inode. |
| 1569 | * - We must be sure not to deadlock with other processes on the |
| 1570 | * system wanting to run delete_inode(). This can happen when they go |
| 1571 | * to lock the orphan dir and the orphan recovery process attempts to |
| 1572 | * iget() inside the orphan dir lock. This can be avoided by |
| 1573 | * advertising our state to ocfs2_delete_inode(). |
| 1574 | */ |
| 1575 | static int ocfs2_recover_orphans(struct ocfs2_super *osb, |
| 1576 | int slot) |
| 1577 | { |
| 1578 | int ret = 0; |
| 1579 | struct inode *inode = NULL; |
| 1580 | struct inode *iter; |
| 1581 | struct ocfs2_inode_info *oi; |
| 1582 | |
| 1583 | mlog(0, "Recover inodes from orphan dir in slot %d\n", slot); |
| 1584 | |
| 1585 | ocfs2_mark_recovering_orphan_dir(osb, slot); |
| 1586 | ret = ocfs2_queue_orphans(osb, slot, &inode); |
| 1587 | ocfs2_clear_recovering_orphan_dir(osb, slot); |
| 1588 | |
| 1589 | /* Error here should be noted, but we want to continue with as |
| 1590 | * many queued inodes as we've got. */ |
| 1591 | if (ret) |
| 1592 | mlog_errno(ret); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1593 | |
| 1594 | while (inode) { |
| 1595 | oi = OCFS2_I(inode); |
Mark Fasheh | b069705 | 2006-03-03 10:24:33 -0800 | [diff] [blame] | 1596 | mlog(0, "iput orphan %llu\n", (unsigned long long)oi->ip_blkno); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1597 | |
| 1598 | iter = oi->ip_next_orphan; |
| 1599 | |
| 1600 | spin_lock(&oi->ip_lock); |
| 1601 | /* Delete voting may have set these on the assumption |
| 1602 | * that the other node would wipe them successfully. |
| 1603 | * If they are still in the node's orphan dir, we need |
| 1604 | * to reset that state. */ |
| 1605 | oi->ip_flags &= ~(OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE); |
| 1606 | |
| 1607 | /* Set the proper information to get us going into |
| 1608 | * ocfs2_delete_inode. */ |
| 1609 | oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED; |
| 1610 | oi->ip_orphaned_slot = slot; |
| 1611 | spin_unlock(&oi->ip_lock); |
| 1612 | |
| 1613 | iput(inode); |
| 1614 | |
| 1615 | inode = iter; |
| 1616 | } |
| 1617 | |
Mark Fasheh | b4df6ed | 2006-02-22 17:35:08 -0800 | [diff] [blame] | 1618 | return ret; |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1619 | } |
| 1620 | |
| 1621 | static int ocfs2_wait_on_mount(struct ocfs2_super *osb) |
| 1622 | { |
| 1623 | /* This check is good because ocfs2 will wait on our recovery |
| 1624 | * thread before changing it to something other than MOUNTED |
| 1625 | * or DISABLED. */ |
| 1626 | wait_event(osb->osb_mount_event, |
| 1627 | atomic_read(&osb->vol_state) == VOLUME_MOUNTED || |
| 1628 | atomic_read(&osb->vol_state) == VOLUME_DISABLED); |
| 1629 | |
| 1630 | /* If there's an error on mount, then we may never get to the |
| 1631 | * MOUNTED flag, but this is set right before |
| 1632 | * dismount_volume() so we can trust it. */ |
| 1633 | if (atomic_read(&osb->vol_state) == VOLUME_DISABLED) { |
| 1634 | mlog(0, "mount error, exiting!\n"); |
| 1635 | return -EBUSY; |
| 1636 | } |
| 1637 | |
| 1638 | return 0; |
| 1639 | } |
| 1640 | |
| 1641 | static int ocfs2_commit_thread(void *arg) |
| 1642 | { |
| 1643 | int status; |
| 1644 | struct ocfs2_super *osb = arg; |
| 1645 | struct ocfs2_journal *journal = osb->journal; |
| 1646 | |
| 1647 | /* we can trust j_num_trans here because _should_stop() is only set in |
| 1648 | * shutdown and nobody other than ourselves should be able to start |
| 1649 | * transactions. committing on shutdown might take a few iterations |
| 1650 | * as final transactions put deleted inodes on the list */ |
| 1651 | while (!(kthread_should_stop() && |
| 1652 | atomic_read(&journal->j_num_trans) == 0)) { |
| 1653 | |
Mark Fasheh | 745ae8ba | 2006-02-09 13:23:39 -0800 | [diff] [blame] | 1654 | wait_event_interruptible(osb->checkpoint_event, |
| 1655 | atomic_read(&journal->j_num_trans) |
| 1656 | || kthread_should_stop()); |
Mark Fasheh | ccd979b | 2005-12-15 14:31:24 -0800 | [diff] [blame] | 1657 | |
| 1658 | status = ocfs2_commit_cache(osb); |
| 1659 | if (status < 0) |
| 1660 | mlog_errno(status); |
| 1661 | |
| 1662 | if (kthread_should_stop() && atomic_read(&journal->j_num_trans)){ |
| 1663 | mlog(ML_KTHREAD, |
| 1664 | "commit_thread: %u transactions pending on " |
| 1665 | "shutdown\n", |
| 1666 | atomic_read(&journal->j_num_trans)); |
| 1667 | } |
| 1668 | } |
| 1669 | |
| 1670 | return 0; |
| 1671 | } |
| 1672 | |
| 1673 | /* Look for a dirty journal without taking any cluster locks. Used for |
| 1674 | * hard readonly access to determine whether the file system journals |
| 1675 | * require recovery. */ |
| 1676 | int ocfs2_check_journals_nolocks(struct ocfs2_super *osb) |
| 1677 | { |
| 1678 | int ret = 0; |
| 1679 | unsigned int slot; |
| 1680 | struct buffer_head *di_bh; |
| 1681 | struct ocfs2_dinode *di; |
| 1682 | struct inode *journal = NULL; |
| 1683 | |
| 1684 | for(slot = 0; slot < osb->max_slots; slot++) { |
| 1685 | journal = ocfs2_get_system_file_inode(osb, |
| 1686 | JOURNAL_SYSTEM_INODE, |
| 1687 | slot); |
| 1688 | if (!journal || is_bad_inode(journal)) { |
| 1689 | ret = -EACCES; |
| 1690 | mlog_errno(ret); |
| 1691 | goto out; |
| 1692 | } |
| 1693 | |
| 1694 | di_bh = NULL; |
| 1695 | ret = ocfs2_read_block(osb, OCFS2_I(journal)->ip_blkno, &di_bh, |
| 1696 | 0, journal); |
| 1697 | if (ret < 0) { |
| 1698 | mlog_errno(ret); |
| 1699 | goto out; |
| 1700 | } |
| 1701 | |
| 1702 | di = (struct ocfs2_dinode *) di_bh->b_data; |
| 1703 | |
| 1704 | if (le32_to_cpu(di->id1.journal1.ij_flags) & |
| 1705 | OCFS2_JOURNAL_DIRTY_FL) |
| 1706 | ret = -EROFS; |
| 1707 | |
| 1708 | brelse(di_bh); |
| 1709 | if (ret) |
| 1710 | break; |
| 1711 | } |
| 1712 | |
| 1713 | out: |
| 1714 | if (journal) |
| 1715 | iput(journal); |
| 1716 | |
| 1717 | return ret; |
| 1718 | } |