| /* -*- mode: c; c-basic-offset: 8; -*- |
| * vim: noexpandtab sw=8 ts=8 sts=0: |
| * |
| * journal.c |
| * |
| * Defines functions of journalling api |
| * |
| * Copyright (C) 2003, 2004 Oracle. All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public |
| * License along with this program; if not, write to the |
| * Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| * Boston, MA 021110-1307, USA. |
| */ |
| |
| #include <linux/fs.h> |
| #include <linux/types.h> |
| #include <linux/slab.h> |
| #include <linux/highmem.h> |
| #include <linux/kthread.h> |
| |
| #define MLOG_MASK_PREFIX ML_JOURNAL |
| #include <cluster/masklog.h> |
| |
| #include "ocfs2.h" |
| |
| #include "alloc.h" |
| #include "dlmglue.h" |
| #include "extent_map.h" |
| #include "heartbeat.h" |
| #include "inode.h" |
| #include "journal.h" |
| #include "localalloc.h" |
| #include "namei.h" |
| #include "slot_map.h" |
| #include "super.h" |
| #include "vote.h" |
| #include "sysfile.h" |
| |
| #include "buffer_head_io.h" |
| |
| DEFINE_SPINLOCK(trans_inc_lock); |
| |
| static int ocfs2_force_read_journal(struct inode *inode); |
| static int ocfs2_recover_node(struct ocfs2_super *osb, |
| int node_num); |
| static int __ocfs2_recovery_thread(void *arg); |
| static int ocfs2_commit_cache(struct ocfs2_super *osb); |
| static int ocfs2_wait_on_mount(struct ocfs2_super *osb); |
| static void ocfs2_handle_cleanup_locks(struct ocfs2_journal *journal, |
| struct ocfs2_journal_handle *handle); |
| static void ocfs2_commit_unstarted_handle(struct ocfs2_journal_handle *handle); |
| static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb, |
| int dirty); |
| static int ocfs2_trylock_journal(struct ocfs2_super *osb, |
| int slot_num); |
| static int ocfs2_recover_orphans(struct ocfs2_super *osb, |
| int slot); |
| static int ocfs2_commit_thread(void *arg); |
| |
| static int ocfs2_commit_cache(struct ocfs2_super *osb) |
| { |
| int status = 0; |
| unsigned int flushed; |
| unsigned long old_id; |
| struct ocfs2_journal *journal = NULL; |
| |
| mlog_entry_void(); |
| |
| journal = osb->journal; |
| |
| /* Flush all pending commits and checkpoint the journal. */ |
| down_write(&journal->j_trans_barrier); |
| |
| if (atomic_read(&journal->j_num_trans) == 0) { |
| up_write(&journal->j_trans_barrier); |
| mlog(0, "No transactions for me to flush!\n"); |
| goto finally; |
| } |
| |
| journal_lock_updates(journal->j_journal); |
| status = journal_flush(journal->j_journal); |
| journal_unlock_updates(journal->j_journal); |
| if (status < 0) { |
| up_write(&journal->j_trans_barrier); |
| mlog_errno(status); |
| goto finally; |
| } |
| |
| old_id = ocfs2_inc_trans_id(journal); |
| |
| flushed = atomic_read(&journal->j_num_trans); |
| atomic_set(&journal->j_num_trans, 0); |
| up_write(&journal->j_trans_barrier); |
| |
| mlog(0, "commit_thread: flushed transaction %lu (%u handles)\n", |
| journal->j_trans_id, flushed); |
| |
| ocfs2_kick_vote_thread(osb); |
| wake_up(&journal->j_checkpointed); |
| finally: |
| mlog_exit(status); |
| return status; |
| } |
| |
| struct ocfs2_journal_handle *ocfs2_alloc_handle(struct ocfs2_super *osb) |
| { |
| struct ocfs2_journal_handle *retval = NULL; |
| |
| retval = kcalloc(1, sizeof(*retval), GFP_NOFS); |
| if (!retval) { |
| mlog(ML_ERROR, "Failed to allocate memory for journal " |
| "handle!\n"); |
| return NULL; |
| } |
| |
| retval->max_buffs = 0; |
| retval->num_locks = 0; |
| retval->k_handle = NULL; |
| |
| INIT_LIST_HEAD(&retval->locks); |
| INIT_LIST_HEAD(&retval->inode_list); |
| retval->journal = osb->journal; |
| |
| return retval; |
| } |
| |
| /* pass it NULL and it will allocate a new handle object for you. If |
| * you pass it a handle however, it may still return error, in which |
| * case it has free'd the passed handle for you. */ |
| struct ocfs2_journal_handle *ocfs2_start_trans(struct ocfs2_super *osb, |
| struct ocfs2_journal_handle *handle, |
| int max_buffs) |
| { |
| int ret; |
| journal_t *journal = osb->journal->j_journal; |
| |
| mlog_entry("(max_buffs = %d)\n", max_buffs); |
| |
| BUG_ON(!osb || !osb->journal->j_journal); |
| |
| if (ocfs2_is_hard_readonly(osb)) { |
| ret = -EROFS; |
| goto done_free; |
| } |
| |
| BUG_ON(osb->journal->j_state == OCFS2_JOURNAL_FREE); |
| BUG_ON(max_buffs <= 0); |
| |
| /* JBD might support this, but our journalling code doesn't yet. */ |
| if (journal_current_handle()) { |
| mlog(ML_ERROR, "Recursive transaction attempted!\n"); |
| BUG(); |
| } |
| |
| if (!handle) |
| handle = ocfs2_alloc_handle(osb); |
| if (!handle) { |
| ret = -ENOMEM; |
| mlog(ML_ERROR, "Failed to allocate memory for journal " |
| "handle!\n"); |
| goto done_free; |
| } |
| |
| handle->max_buffs = max_buffs; |
| |
| down_read(&osb->journal->j_trans_barrier); |
| |
| /* actually start the transaction now */ |
| handle->k_handle = journal_start(journal, max_buffs); |
| if (IS_ERR(handle->k_handle)) { |
| up_read(&osb->journal->j_trans_barrier); |
| |
| ret = PTR_ERR(handle->k_handle); |
| handle->k_handle = NULL; |
| mlog_errno(ret); |
| |
| if (is_journal_aborted(journal)) { |
| ocfs2_abort(osb->sb, "Detected aborted journal"); |
| ret = -EROFS; |
| } |
| goto done_free; |
| } |
| |
| atomic_inc(&(osb->journal->j_num_trans)); |
| handle->flags |= OCFS2_HANDLE_STARTED; |
| |
| mlog_exit_ptr(handle); |
| return handle; |
| |
| done_free: |
| if (handle) |
| ocfs2_commit_unstarted_handle(handle); /* will kfree handle */ |
| |
| mlog_exit(ret); |
| return ERR_PTR(ret); |
| } |
| |
| void ocfs2_handle_add_inode(struct ocfs2_journal_handle *handle, |
| struct inode *inode) |
| { |
| BUG_ON(!handle); |
| BUG_ON(!inode); |
| |
| atomic_inc(&inode->i_count); |
| |
| /* we're obviously changing it... */ |
| mutex_lock(&inode->i_mutex); |
| |
| /* sanity check */ |
| BUG_ON(OCFS2_I(inode)->ip_handle); |
| BUG_ON(!list_empty(&OCFS2_I(inode)->ip_handle_list)); |
| |
| OCFS2_I(inode)->ip_handle = handle; |
| list_move_tail(&(OCFS2_I(inode)->ip_handle_list), &(handle->inode_list)); |
| } |
| |
| static void ocfs2_handle_unlock_inodes(struct ocfs2_journal_handle *handle) |
| { |
| struct list_head *p, *n; |
| struct inode *inode; |
| struct ocfs2_inode_info *oi; |
| |
| list_for_each_safe(p, n, &handle->inode_list) { |
| oi = list_entry(p, struct ocfs2_inode_info, |
| ip_handle_list); |
| inode = &oi->vfs_inode; |
| |
| OCFS2_I(inode)->ip_handle = NULL; |
| list_del_init(&OCFS2_I(inode)->ip_handle_list); |
| |
| mutex_unlock(&inode->i_mutex); |
| iput(inode); |
| } |
| } |
| |
| /* This is trivial so we do it out of the main commit |
| * paths. Beware, it can be called from start_trans too! */ |
| static void ocfs2_commit_unstarted_handle(struct ocfs2_journal_handle *handle) |
| { |
| mlog_entry_void(); |
| |
| BUG_ON(handle->flags & OCFS2_HANDLE_STARTED); |
| |
| ocfs2_handle_unlock_inodes(handle); |
| /* You are allowed to add journal locks before the transaction |
| * has started. */ |
| ocfs2_handle_cleanup_locks(handle->journal, handle); |
| |
| kfree(handle); |
| |
| mlog_exit_void(); |
| } |
| |
| void ocfs2_commit_trans(struct ocfs2_journal_handle *handle) |
| { |
| handle_t *jbd_handle; |
| int retval; |
| struct ocfs2_journal *journal = handle->journal; |
| |
| mlog_entry_void(); |
| |
| BUG_ON(!handle); |
| |
| if (!(handle->flags & OCFS2_HANDLE_STARTED)) { |
| ocfs2_commit_unstarted_handle(handle); |
| mlog_exit_void(); |
| return; |
| } |
| |
| /* release inode semaphores we took during this transaction */ |
| ocfs2_handle_unlock_inodes(handle); |
| |
| /* ocfs2_extend_trans may have had to call journal_restart |
| * which will always commit the transaction, but may return |
| * error for any number of reasons. If this is the case, we |
| * clear k_handle as it's not valid any more. */ |
| if (handle->k_handle) { |
| jbd_handle = handle->k_handle; |
| |
| if (handle->flags & OCFS2_HANDLE_SYNC) |
| jbd_handle->h_sync = 1; |
| else |
| jbd_handle->h_sync = 0; |
| |
| /* actually stop the transaction. if we've set h_sync, |
| * it'll have been committed when we return */ |
| retval = journal_stop(jbd_handle); |
| if (retval < 0) { |
| mlog_errno(retval); |
| mlog(ML_ERROR, "Could not commit transaction\n"); |
| BUG(); |
| } |
| |
| handle->k_handle = NULL; /* it's been free'd in journal_stop */ |
| } |
| |
| ocfs2_handle_cleanup_locks(journal, handle); |
| |
| up_read(&journal->j_trans_barrier); |
| |
| kfree(handle); |
| mlog_exit_void(); |
| } |
| |
| /* |
| * 'nblocks' is what you want to add to the current |
| * transaction. extend_trans will either extend the current handle by |
| * nblocks, or commit it and start a new one with nblocks credits. |
| * |
| * WARNING: This will not release any semaphores or disk locks taken |
| * during the transaction, so make sure they were taken *before* |
| * start_trans or we'll have ordering deadlocks. |
| * |
| * WARNING2: Note that we do *not* drop j_trans_barrier here. This is |
| * good because transaction ids haven't yet been recorded on the |
| * cluster locks associated with this handle. |
| */ |
| int ocfs2_extend_trans(struct ocfs2_journal_handle *handle, |
| int nblocks) |
| { |
| int status; |
| |
| BUG_ON(!handle); |
| BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED)); |
| BUG_ON(!nblocks); |
| |
| mlog_entry_void(); |
| |
| mlog(0, "Trying to extend transaction by %d blocks\n", nblocks); |
| |
| status = journal_extend(handle->k_handle, nblocks); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| if (status > 0) { |
| mlog(0, "journal_extend failed, trying journal_restart\n"); |
| status = journal_restart(handle->k_handle, nblocks); |
| if (status < 0) { |
| handle->k_handle = NULL; |
| mlog_errno(status); |
| goto bail; |
| } |
| handle->max_buffs = nblocks; |
| } else |
| handle->max_buffs += nblocks; |
| |
| status = 0; |
| bail: |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| int ocfs2_journal_access(struct ocfs2_journal_handle *handle, |
| struct inode *inode, |
| struct buffer_head *bh, |
| int type) |
| { |
| int status; |
| |
| BUG_ON(!inode); |
| BUG_ON(!handle); |
| BUG_ON(!bh); |
| BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED)); |
| |
| mlog_entry("bh->b_blocknr=%llu, type=%d (\"%s\"), bh->b_size = %zu\n", |
| (unsigned long long)bh->b_blocknr, type, |
| (type == OCFS2_JOURNAL_ACCESS_CREATE) ? |
| "OCFS2_JOURNAL_ACCESS_CREATE" : |
| "OCFS2_JOURNAL_ACCESS_WRITE", |
| bh->b_size); |
| |
| /* we can safely remove this assertion after testing. */ |
| if (!buffer_uptodate(bh)) { |
| mlog(ML_ERROR, "giving me a buffer that's not uptodate!\n"); |
| mlog(ML_ERROR, "b_blocknr=%llu\n", |
| (unsigned long long)bh->b_blocknr); |
| BUG(); |
| } |
| |
| /* Set the current transaction information on the inode so |
| * that the locking code knows whether it can drop it's locks |
| * on this inode or not. We're protected from the commit |
| * thread updating the current transaction id until |
| * ocfs2_commit_trans() because ocfs2_start_trans() took |
| * j_trans_barrier for us. */ |
| ocfs2_set_inode_lock_trans(OCFS2_SB(inode->i_sb)->journal, inode); |
| |
| mutex_lock(&OCFS2_I(inode)->ip_io_mutex); |
| switch (type) { |
| case OCFS2_JOURNAL_ACCESS_CREATE: |
| case OCFS2_JOURNAL_ACCESS_WRITE: |
| status = journal_get_write_access(handle->k_handle, bh); |
| break; |
| |
| case OCFS2_JOURNAL_ACCESS_UNDO: |
| status = journal_get_undo_access(handle->k_handle, bh); |
| break; |
| |
| default: |
| status = -EINVAL; |
| mlog(ML_ERROR, "Uknown access type!\n"); |
| } |
| mutex_unlock(&OCFS2_I(inode)->ip_io_mutex); |
| |
| if (status < 0) |
| mlog(ML_ERROR, "Error %d getting %d access to buffer!\n", |
| status, type); |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| int ocfs2_journal_dirty(struct ocfs2_journal_handle *handle, |
| struct buffer_head *bh) |
| { |
| int status; |
| |
| BUG_ON(!(handle->flags & OCFS2_HANDLE_STARTED)); |
| |
| mlog_entry("(bh->b_blocknr=%llu)\n", |
| (unsigned long long)bh->b_blocknr); |
| |
| status = journal_dirty_metadata(handle->k_handle, bh); |
| if (status < 0) |
| mlog(ML_ERROR, "Could not dirty metadata buffer. " |
| "(bh->b_blocknr=%llu)\n", |
| (unsigned long long)bh->b_blocknr); |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| int ocfs2_journal_dirty_data(handle_t *handle, |
| struct buffer_head *bh) |
| { |
| int err = journal_dirty_data(handle, bh); |
| if (err) |
| mlog_errno(err); |
| /* TODO: When we can handle it, abort the handle and go RO on |
| * error here. */ |
| |
| return err; |
| } |
| |
| /* We always assume you're adding a metadata lock at level 'ex' */ |
| int ocfs2_handle_add_lock(struct ocfs2_journal_handle *handle, |
| struct inode *inode) |
| { |
| int status; |
| struct ocfs2_journal_lock *lock; |
| |
| BUG_ON(!inode); |
| |
| lock = kmem_cache_alloc(ocfs2_lock_cache, GFP_NOFS); |
| if (!lock) { |
| status = -ENOMEM; |
| mlog_errno(-ENOMEM); |
| goto bail; |
| } |
| |
| if (!igrab(inode)) |
| BUG(); |
| lock->jl_inode = inode; |
| |
| list_add_tail(&(lock->jl_lock_list), &(handle->locks)); |
| handle->num_locks++; |
| |
| status = 0; |
| bail: |
| mlog_exit(status); |
| return status; |
| } |
| |
| static void ocfs2_handle_cleanup_locks(struct ocfs2_journal *journal, |
| struct ocfs2_journal_handle *handle) |
| { |
| struct list_head *p, *n; |
| struct ocfs2_journal_lock *lock; |
| struct inode *inode; |
| |
| list_for_each_safe(p, n, &(handle->locks)) { |
| lock = list_entry(p, struct ocfs2_journal_lock, |
| jl_lock_list); |
| list_del(&lock->jl_lock_list); |
| handle->num_locks--; |
| |
| inode = lock->jl_inode; |
| ocfs2_meta_unlock(inode, 1); |
| if (atomic_read(&inode->i_count) == 1) |
| mlog(ML_ERROR, |
| "Inode %llu, I'm doing a last iput for!", |
| (unsigned long long)OCFS2_I(inode)->ip_blkno); |
| iput(inode); |
| kmem_cache_free(ocfs2_lock_cache, lock); |
| } |
| } |
| |
| #define OCFS2_DEFAULT_COMMIT_INTERVAL (HZ * 5) |
| |
| void ocfs2_set_journal_params(struct ocfs2_super *osb) |
| { |
| journal_t *journal = osb->journal->j_journal; |
| |
| spin_lock(&journal->j_state_lock); |
| journal->j_commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL; |
| if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER) |
| journal->j_flags |= JFS_BARRIER; |
| else |
| journal->j_flags &= ~JFS_BARRIER; |
| spin_unlock(&journal->j_state_lock); |
| } |
| |
| int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty) |
| { |
| int status = -1; |
| struct inode *inode = NULL; /* the journal inode */ |
| journal_t *j_journal = NULL; |
| struct ocfs2_dinode *di = NULL; |
| struct buffer_head *bh = NULL; |
| struct ocfs2_super *osb; |
| int meta_lock = 0; |
| |
| mlog_entry_void(); |
| |
| BUG_ON(!journal); |
| |
| osb = journal->j_osb; |
| |
| /* already have the inode for our journal */ |
| inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, |
| osb->slot_num); |
| if (inode == NULL) { |
| status = -EACCES; |
| mlog_errno(status); |
| goto done; |
| } |
| if (is_bad_inode(inode)) { |
| mlog(ML_ERROR, "access error (bad inode)\n"); |
| iput(inode); |
| inode = NULL; |
| status = -EACCES; |
| goto done; |
| } |
| |
| SET_INODE_JOURNAL(inode); |
| OCFS2_I(inode)->ip_open_count++; |
| |
| /* Skip recovery waits here - journal inode metadata never |
| * changes in a live cluster so it can be considered an |
| * exception to the rule. */ |
| status = ocfs2_meta_lock_full(inode, NULL, &bh, 1, |
| OCFS2_META_LOCK_RECOVERY); |
| if (status < 0) { |
| if (status != -ERESTARTSYS) |
| mlog(ML_ERROR, "Could not get lock on journal!\n"); |
| goto done; |
| } |
| |
| meta_lock = 1; |
| di = (struct ocfs2_dinode *)bh->b_data; |
| |
| if (inode->i_size < OCFS2_MIN_JOURNAL_SIZE) { |
| mlog(ML_ERROR, "Journal file size (%lld) is too small!\n", |
| inode->i_size); |
| status = -EINVAL; |
| goto done; |
| } |
| |
| mlog(0, "inode->i_size = %lld\n", inode->i_size); |
| mlog(0, "inode->i_blocks = %llu\n", |
| (unsigned long long)inode->i_blocks); |
| mlog(0, "inode->ip_clusters = %u\n", OCFS2_I(inode)->ip_clusters); |
| |
| /* call the kernels journal init function now */ |
| j_journal = journal_init_inode(inode); |
| if (j_journal == NULL) { |
| mlog(ML_ERROR, "Linux journal layer error\n"); |
| status = -EINVAL; |
| goto done; |
| } |
| |
| mlog(0, "Returned from journal_init_inode\n"); |
| mlog(0, "j_journal->j_maxlen = %u\n", j_journal->j_maxlen); |
| |
| *dirty = (le32_to_cpu(di->id1.journal1.ij_flags) & |
| OCFS2_JOURNAL_DIRTY_FL); |
| |
| journal->j_journal = j_journal; |
| journal->j_inode = inode; |
| journal->j_bh = bh; |
| |
| ocfs2_set_journal_params(osb); |
| |
| journal->j_state = OCFS2_JOURNAL_LOADED; |
| |
| status = 0; |
| done: |
| if (status < 0) { |
| if (meta_lock) |
| ocfs2_meta_unlock(inode, 1); |
| if (bh != NULL) |
| brelse(bh); |
| if (inode) { |
| OCFS2_I(inode)->ip_open_count--; |
| iput(inode); |
| } |
| } |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| static int ocfs2_journal_toggle_dirty(struct ocfs2_super *osb, |
| int dirty) |
| { |
| int status; |
| unsigned int flags; |
| struct ocfs2_journal *journal = osb->journal; |
| struct buffer_head *bh = journal->j_bh; |
| struct ocfs2_dinode *fe; |
| |
| mlog_entry_void(); |
| |
| fe = (struct ocfs2_dinode *)bh->b_data; |
| if (!OCFS2_IS_VALID_DINODE(fe)) { |
| /* This is called from startup/shutdown which will |
| * handle the errors in a specific manner, so no need |
| * to call ocfs2_error() here. */ |
| mlog(ML_ERROR, "Journal dinode %llu has invalid " |
| "signature: %.*s", (unsigned long long)fe->i_blkno, 7, |
| fe->i_signature); |
| status = -EIO; |
| goto out; |
| } |
| |
| flags = le32_to_cpu(fe->id1.journal1.ij_flags); |
| if (dirty) |
| flags |= OCFS2_JOURNAL_DIRTY_FL; |
| else |
| flags &= ~OCFS2_JOURNAL_DIRTY_FL; |
| fe->id1.journal1.ij_flags = cpu_to_le32(flags); |
| |
| status = ocfs2_write_block(osb, bh, journal->j_inode); |
| if (status < 0) |
| mlog_errno(status); |
| |
| out: |
| mlog_exit(status); |
| return status; |
| } |
| |
| /* |
| * If the journal has been kmalloc'd it needs to be freed after this |
| * call. |
| */ |
| void ocfs2_journal_shutdown(struct ocfs2_super *osb) |
| { |
| struct ocfs2_journal *journal = NULL; |
| int status = 0; |
| struct inode *inode = NULL; |
| int num_running_trans = 0; |
| |
| mlog_entry_void(); |
| |
| BUG_ON(!osb); |
| |
| journal = osb->journal; |
| if (!journal) |
| goto done; |
| |
| inode = journal->j_inode; |
| |
| if (journal->j_state != OCFS2_JOURNAL_LOADED) |
| goto done; |
| |
| /* need to inc inode use count as journal_destroy will iput. */ |
| if (!igrab(inode)) |
| BUG(); |
| |
| num_running_trans = atomic_read(&(osb->journal->j_num_trans)); |
| if (num_running_trans > 0) |
| mlog(0, "Shutting down journal: must wait on %d " |
| "running transactions!\n", |
| num_running_trans); |
| |
| /* Do a commit_cache here. It will flush our journal, *and* |
| * release any locks that are still held. |
| * set the SHUTDOWN flag and release the trans lock. |
| * the commit thread will take the trans lock for us below. */ |
| journal->j_state = OCFS2_JOURNAL_IN_SHUTDOWN; |
| |
| /* The OCFS2_JOURNAL_IN_SHUTDOWN will signal to commit_cache to not |
| * drop the trans_lock (which we want to hold until we |
| * completely destroy the journal. */ |
| if (osb->commit_task) { |
| /* Wait for the commit thread */ |
| mlog(0, "Waiting for ocfs2commit to exit....\n"); |
| kthread_stop(osb->commit_task); |
| osb->commit_task = NULL; |
| } |
| |
| BUG_ON(atomic_read(&(osb->journal->j_num_trans)) != 0); |
| |
| status = ocfs2_journal_toggle_dirty(osb, 0); |
| if (status < 0) |
| mlog_errno(status); |
| |
| /* Shutdown the kernel journal system */ |
| journal_destroy(journal->j_journal); |
| |
| OCFS2_I(inode)->ip_open_count--; |
| |
| /* unlock our journal */ |
| ocfs2_meta_unlock(inode, 1); |
| |
| brelse(journal->j_bh); |
| journal->j_bh = NULL; |
| |
| journal->j_state = OCFS2_JOURNAL_FREE; |
| |
| // up_write(&journal->j_trans_barrier); |
| done: |
| if (inode) |
| iput(inode); |
| mlog_exit_void(); |
| } |
| |
| static void ocfs2_clear_journal_error(struct super_block *sb, |
| journal_t *journal, |
| int slot) |
| { |
| int olderr; |
| |
| olderr = journal_errno(journal); |
| if (olderr) { |
| mlog(ML_ERROR, "File system error %d recorded in " |
| "journal %u.\n", olderr, slot); |
| mlog(ML_ERROR, "File system on device %s needs checking.\n", |
| sb->s_id); |
| |
| journal_ack_err(journal); |
| journal_clear_err(journal); |
| } |
| } |
| |
| int ocfs2_journal_load(struct ocfs2_journal *journal) |
| { |
| int status = 0; |
| struct ocfs2_super *osb; |
| |
| mlog_entry_void(); |
| |
| if (!journal) |
| BUG(); |
| |
| osb = journal->j_osb; |
| |
| status = journal_load(journal->j_journal); |
| if (status < 0) { |
| mlog(ML_ERROR, "Failed to load journal!\n"); |
| goto done; |
| } |
| |
| ocfs2_clear_journal_error(osb->sb, journal->j_journal, osb->slot_num); |
| |
| status = ocfs2_journal_toggle_dirty(osb, 1); |
| if (status < 0) { |
| mlog_errno(status); |
| goto done; |
| } |
| |
| /* Launch the commit thread */ |
| osb->commit_task = kthread_run(ocfs2_commit_thread, osb, "ocfs2cmt-%d", |
| osb->osb_id); |
| if (IS_ERR(osb->commit_task)) { |
| status = PTR_ERR(osb->commit_task); |
| osb->commit_task = NULL; |
| mlog(ML_ERROR, "unable to launch ocfs2commit thread, error=%d", |
| status); |
| goto done; |
| } |
| |
| done: |
| mlog_exit(status); |
| return status; |
| } |
| |
| |
| /* 'full' flag tells us whether we clear out all blocks or if we just |
| * mark the journal clean */ |
| int ocfs2_journal_wipe(struct ocfs2_journal *journal, int full) |
| { |
| int status; |
| |
| mlog_entry_void(); |
| |
| BUG_ON(!journal); |
| |
| status = journal_wipe(journal->j_journal, full); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| status = ocfs2_journal_toggle_dirty(journal->j_osb, 0); |
| if (status < 0) |
| mlog_errno(status); |
| |
| bail: |
| mlog_exit(status); |
| return status; |
| } |
| |
| /* |
| * JBD Might read a cached version of another nodes journal file. We |
| * don't want this as this file changes often and we get no |
| * notification on those changes. The only way to be sure that we've |
| * got the most up to date version of those blocks then is to force |
| * read them off disk. Just searching through the buffer cache won't |
| * work as there may be pages backing this file which are still marked |
| * up to date. We know things can't change on this file underneath us |
| * as we have the lock by now :) |
| */ |
| static int ocfs2_force_read_journal(struct inode *inode) |
| { |
| int status = 0; |
| int i, p_blocks; |
| u64 v_blkno, p_blkno; |
| #define CONCURRENT_JOURNAL_FILL 32 |
| struct buffer_head *bhs[CONCURRENT_JOURNAL_FILL]; |
| |
| mlog_entry_void(); |
| |
| BUG_ON(inode->i_blocks != |
| ocfs2_align_bytes_to_sectors(i_size_read(inode))); |
| |
| memset(bhs, 0, sizeof(struct buffer_head *) * CONCURRENT_JOURNAL_FILL); |
| |
| mlog(0, "Force reading %llu blocks\n", |
| (unsigned long long)(inode->i_blocks >> |
| (inode->i_sb->s_blocksize_bits - 9))); |
| |
| v_blkno = 0; |
| while (v_blkno < |
| (inode->i_blocks >> (inode->i_sb->s_blocksize_bits - 9))) { |
| |
| status = ocfs2_extent_map_get_blocks(inode, v_blkno, |
| 1, &p_blkno, |
| &p_blocks); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| if (p_blocks > CONCURRENT_JOURNAL_FILL) |
| p_blocks = CONCURRENT_JOURNAL_FILL; |
| |
| /* We are reading journal data which should not |
| * be put in the uptodate cache */ |
| status = ocfs2_read_blocks(OCFS2_SB(inode->i_sb), |
| p_blkno, p_blocks, bhs, 0, |
| NULL); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| for(i = 0; i < p_blocks; i++) { |
| brelse(bhs[i]); |
| bhs[i] = NULL; |
| } |
| |
| v_blkno += p_blocks; |
| } |
| |
| bail: |
| for(i = 0; i < CONCURRENT_JOURNAL_FILL; i++) |
| if (bhs[i]) |
| brelse(bhs[i]); |
| mlog_exit(status); |
| return status; |
| } |
| |
| struct ocfs2_la_recovery_item { |
| struct list_head lri_list; |
| int lri_slot; |
| struct ocfs2_dinode *lri_la_dinode; |
| struct ocfs2_dinode *lri_tl_dinode; |
| }; |
| |
| /* Does the second half of the recovery process. By this point, the |
| * node is marked clean and can actually be considered recovered, |
| * hence it's no longer in the recovery map, but there's still some |
| * cleanup we can do which shouldn't happen within the recovery thread |
| * as locking in that context becomes very difficult if we are to take |
| * recovering nodes into account. |
| * |
| * NOTE: This function can and will sleep on recovery of other nodes |
| * during cluster locking, just like any other ocfs2 process. |
| */ |
| void ocfs2_complete_recovery(void *data) |
| { |
| int ret; |
| struct ocfs2_super *osb = data; |
| struct ocfs2_journal *journal = osb->journal; |
| struct ocfs2_dinode *la_dinode, *tl_dinode; |
| struct ocfs2_la_recovery_item *item; |
| struct list_head *p, *n; |
| LIST_HEAD(tmp_la_list); |
| |
| mlog_entry_void(); |
| |
| mlog(0, "completing recovery from keventd\n"); |
| |
| spin_lock(&journal->j_lock); |
| list_splice_init(&journal->j_la_cleanups, &tmp_la_list); |
| spin_unlock(&journal->j_lock); |
| |
| list_for_each_safe(p, n, &tmp_la_list) { |
| item = list_entry(p, struct ocfs2_la_recovery_item, lri_list); |
| list_del_init(&item->lri_list); |
| |
| mlog(0, "Complete recovery for slot %d\n", item->lri_slot); |
| |
| la_dinode = item->lri_la_dinode; |
| if (la_dinode) { |
| mlog(0, "Clean up local alloc %llu\n", |
| (unsigned long long)la_dinode->i_blkno); |
| |
| ret = ocfs2_complete_local_alloc_recovery(osb, |
| la_dinode); |
| if (ret < 0) |
| mlog_errno(ret); |
| |
| kfree(la_dinode); |
| } |
| |
| tl_dinode = item->lri_tl_dinode; |
| if (tl_dinode) { |
| mlog(0, "Clean up truncate log %llu\n", |
| (unsigned long long)tl_dinode->i_blkno); |
| |
| ret = ocfs2_complete_truncate_log_recovery(osb, |
| tl_dinode); |
| if (ret < 0) |
| mlog_errno(ret); |
| |
| kfree(tl_dinode); |
| } |
| |
| ret = ocfs2_recover_orphans(osb, item->lri_slot); |
| if (ret < 0) |
| mlog_errno(ret); |
| |
| kfree(item); |
| } |
| |
| mlog(0, "Recovery completion\n"); |
| mlog_exit_void(); |
| } |
| |
| /* NOTE: This function always eats your references to la_dinode and |
| * tl_dinode, either manually on error, or by passing them to |
| * ocfs2_complete_recovery */ |
| static void ocfs2_queue_recovery_completion(struct ocfs2_journal *journal, |
| int slot_num, |
| struct ocfs2_dinode *la_dinode, |
| struct ocfs2_dinode *tl_dinode) |
| { |
| struct ocfs2_la_recovery_item *item; |
| |
| item = kmalloc(sizeof(struct ocfs2_la_recovery_item), GFP_NOFS); |
| if (!item) { |
| /* Though we wish to avoid it, we are in fact safe in |
| * skipping local alloc cleanup as fsck.ocfs2 is more |
| * than capable of reclaiming unused space. */ |
| if (la_dinode) |
| kfree(la_dinode); |
| |
| if (tl_dinode) |
| kfree(tl_dinode); |
| |
| mlog_errno(-ENOMEM); |
| return; |
| } |
| |
| INIT_LIST_HEAD(&item->lri_list); |
| item->lri_la_dinode = la_dinode; |
| item->lri_slot = slot_num; |
| item->lri_tl_dinode = tl_dinode; |
| |
| spin_lock(&journal->j_lock); |
| list_add_tail(&item->lri_list, &journal->j_la_cleanups); |
| queue_work(ocfs2_wq, &journal->j_recovery_work); |
| spin_unlock(&journal->j_lock); |
| } |
| |
| /* Called by the mount code to queue recovery the last part of |
| * recovery for it's own slot. */ |
| void ocfs2_complete_mount_recovery(struct ocfs2_super *osb) |
| { |
| struct ocfs2_journal *journal = osb->journal; |
| |
| if (osb->dirty) { |
| /* No need to queue up our truncate_log as regular |
| * cleanup will catch that. */ |
| ocfs2_queue_recovery_completion(journal, |
| osb->slot_num, |
| osb->local_alloc_copy, |
| NULL); |
| ocfs2_schedule_truncate_log_flush(osb, 0); |
| |
| osb->local_alloc_copy = NULL; |
| osb->dirty = 0; |
| } |
| } |
| |
| static int __ocfs2_recovery_thread(void *arg) |
| { |
| int status, node_num; |
| struct ocfs2_super *osb = arg; |
| |
| mlog_entry_void(); |
| |
| status = ocfs2_wait_on_mount(osb); |
| if (status < 0) { |
| goto bail; |
| } |
| |
| restart: |
| status = ocfs2_super_lock(osb, 1); |
| if (status < 0) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| while(!ocfs2_node_map_is_empty(osb, &osb->recovery_map)) { |
| node_num = ocfs2_node_map_first_set_bit(osb, |
| &osb->recovery_map); |
| if (node_num == O2NM_INVALID_NODE_NUM) { |
| mlog(0, "Out of nodes to recover.\n"); |
| break; |
| } |
| |
| status = ocfs2_recover_node(osb, node_num); |
| if (status < 0) { |
| mlog(ML_ERROR, |
| "Error %d recovering node %d on device (%u,%u)!\n", |
| status, node_num, |
| MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); |
| mlog(ML_ERROR, "Volume requires unmount.\n"); |
| continue; |
| } |
| |
| ocfs2_recovery_map_clear(osb, node_num); |
| } |
| ocfs2_super_unlock(osb, 1); |
| |
| /* We always run recovery on our own orphan dir - the dead |
| * node(s) may have voted "no" on an inode delete earlier. A |
| * revote is therefore required. */ |
| ocfs2_queue_recovery_completion(osb->journal, osb->slot_num, NULL, |
| NULL); |
| |
| bail: |
| mutex_lock(&osb->recovery_lock); |
| if (!status && |
| !ocfs2_node_map_is_empty(osb, &osb->recovery_map)) { |
| mutex_unlock(&osb->recovery_lock); |
| goto restart; |
| } |
| |
| osb->recovery_thread_task = NULL; |
| mb(); /* sync with ocfs2_recovery_thread_running */ |
| wake_up(&osb->recovery_event); |
| |
| mutex_unlock(&osb->recovery_lock); |
| |
| mlog_exit(status); |
| /* no one is callint kthread_stop() for us so the kthread() api |
| * requires that we call do_exit(). And it isn't exported, but |
| * complete_and_exit() seems to be a minimal wrapper around it. */ |
| complete_and_exit(NULL, status); |
| return status; |
| } |
| |
| void ocfs2_recovery_thread(struct ocfs2_super *osb, int node_num) |
| { |
| mlog_entry("(node_num=%d, osb->node_num = %d)\n", |
| node_num, osb->node_num); |
| |
| mutex_lock(&osb->recovery_lock); |
| if (osb->disable_recovery) |
| goto out; |
| |
| /* People waiting on recovery will wait on |
| * the recovery map to empty. */ |
| if (!ocfs2_recovery_map_set(osb, node_num)) |
| mlog(0, "node %d already be in recovery.\n", node_num); |
| |
| mlog(0, "starting recovery thread...\n"); |
| |
| if (osb->recovery_thread_task) |
| goto out; |
| |
| osb->recovery_thread_task = kthread_run(__ocfs2_recovery_thread, osb, |
| "ocfs2rec-%d", osb->osb_id); |
| if (IS_ERR(osb->recovery_thread_task)) { |
| mlog_errno((int)PTR_ERR(osb->recovery_thread_task)); |
| osb->recovery_thread_task = NULL; |
| } |
| |
| out: |
| mutex_unlock(&osb->recovery_lock); |
| wake_up(&osb->recovery_event); |
| |
| mlog_exit_void(); |
| } |
| |
| /* Does the actual journal replay and marks the journal inode as |
| * clean. Will only replay if the journal inode is marked dirty. */ |
| static int ocfs2_replay_journal(struct ocfs2_super *osb, |
| int node_num, |
| int slot_num) |
| { |
| int status; |
| int got_lock = 0; |
| unsigned int flags; |
| struct inode *inode = NULL; |
| struct ocfs2_dinode *fe; |
| journal_t *journal = NULL; |
| struct buffer_head *bh = NULL; |
| |
| inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, |
| slot_num); |
| if (inode == NULL) { |
| status = -EACCES; |
| mlog_errno(status); |
| goto done; |
| } |
| if (is_bad_inode(inode)) { |
| status = -EACCES; |
| iput(inode); |
| inode = NULL; |
| mlog_errno(status); |
| goto done; |
| } |
| SET_INODE_JOURNAL(inode); |
| |
| status = ocfs2_meta_lock_full(inode, NULL, &bh, 1, |
| OCFS2_META_LOCK_RECOVERY); |
| if (status < 0) { |
| mlog(0, "status returned from ocfs2_meta_lock=%d\n", status); |
| if (status != -ERESTARTSYS) |
| mlog(ML_ERROR, "Could not lock journal!\n"); |
| goto done; |
| } |
| got_lock = 1; |
| |
| fe = (struct ocfs2_dinode *) bh->b_data; |
| |
| flags = le32_to_cpu(fe->id1.journal1.ij_flags); |
| |
| if (!(flags & OCFS2_JOURNAL_DIRTY_FL)) { |
| mlog(0, "No recovery required for node %d\n", node_num); |
| goto done; |
| } |
| |
| mlog(ML_NOTICE, "Recovering node %d from slot %d on device (%u,%u)\n", |
| node_num, slot_num, |
| MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev)); |
| |
| OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters); |
| |
| status = ocfs2_force_read_journal(inode); |
| if (status < 0) { |
| mlog_errno(status); |
| goto done; |
| } |
| |
| mlog(0, "calling journal_init_inode\n"); |
| journal = journal_init_inode(inode); |
| if (journal == NULL) { |
| mlog(ML_ERROR, "Linux journal layer error\n"); |
| status = -EIO; |
| goto done; |
| } |
| |
| status = journal_load(journal); |
| if (status < 0) { |
| mlog_errno(status); |
| if (!igrab(inode)) |
| BUG(); |
| journal_destroy(journal); |
| goto done; |
| } |
| |
| ocfs2_clear_journal_error(osb->sb, journal, slot_num); |
| |
| /* wipe the journal */ |
| mlog(0, "flushing the journal.\n"); |
| journal_lock_updates(journal); |
| status = journal_flush(journal); |
| journal_unlock_updates(journal); |
| if (status < 0) |
| mlog_errno(status); |
| |
| /* This will mark the node clean */ |
| flags = le32_to_cpu(fe->id1.journal1.ij_flags); |
| flags &= ~OCFS2_JOURNAL_DIRTY_FL; |
| fe->id1.journal1.ij_flags = cpu_to_le32(flags); |
| |
| status = ocfs2_write_block(osb, bh, inode); |
| if (status < 0) |
| mlog_errno(status); |
| |
| if (!igrab(inode)) |
| BUG(); |
| |
| journal_destroy(journal); |
| |
| done: |
| /* drop the lock on this nodes journal */ |
| if (got_lock) |
| ocfs2_meta_unlock(inode, 1); |
| |
| if (inode) |
| iput(inode); |
| |
| if (bh) |
| brelse(bh); |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| /* |
| * Do the most important parts of node recovery: |
| * - Replay it's journal |
| * - Stamp a clean local allocator file |
| * - Stamp a clean truncate log |
| * - Mark the node clean |
| * |
| * If this function completes without error, a node in OCFS2 can be |
| * said to have been safely recovered. As a result, failure during the |
| * second part of a nodes recovery process (local alloc recovery) is |
| * far less concerning. |
| */ |
| static int ocfs2_recover_node(struct ocfs2_super *osb, |
| int node_num) |
| { |
| int status = 0; |
| int slot_num; |
| struct ocfs2_slot_info *si = osb->slot_info; |
| struct ocfs2_dinode *la_copy = NULL; |
| struct ocfs2_dinode *tl_copy = NULL; |
| |
| mlog_entry("(node_num=%d, osb->node_num = %d)\n", |
| node_num, osb->node_num); |
| |
| mlog(0, "checking node %d\n", node_num); |
| |
| /* Should not ever be called to recover ourselves -- in that |
| * case we should've called ocfs2_journal_load instead. */ |
| BUG_ON(osb->node_num == node_num); |
| |
| slot_num = ocfs2_node_num_to_slot(si, node_num); |
| if (slot_num == OCFS2_INVALID_SLOT) { |
| status = 0; |
| mlog(0, "no slot for this node, so no recovery required.\n"); |
| goto done; |
| } |
| |
| mlog(0, "node %d was using slot %d\n", node_num, slot_num); |
| |
| status = ocfs2_replay_journal(osb, node_num, slot_num); |
| if (status < 0) { |
| mlog_errno(status); |
| goto done; |
| } |
| |
| /* Stamp a clean local alloc file AFTER recovering the journal... */ |
| status = ocfs2_begin_local_alloc_recovery(osb, slot_num, &la_copy); |
| if (status < 0) { |
| mlog_errno(status); |
| goto done; |
| } |
| |
| /* An error from begin_truncate_log_recovery is not |
| * serious enough to warrant halting the rest of |
| * recovery. */ |
| status = ocfs2_begin_truncate_log_recovery(osb, slot_num, &tl_copy); |
| if (status < 0) |
| mlog_errno(status); |
| |
| /* Likewise, this would be a strange but ultimately not so |
| * harmful place to get an error... */ |
| ocfs2_clear_slot(si, slot_num); |
| status = ocfs2_update_disk_slots(osb, si); |
| if (status < 0) |
| mlog_errno(status); |
| |
| /* This will kfree the memory pointed to by la_copy and tl_copy */ |
| ocfs2_queue_recovery_completion(osb->journal, slot_num, la_copy, |
| tl_copy); |
| |
| status = 0; |
| done: |
| |
| mlog_exit(status); |
| return status; |
| } |
| |
| /* Test node liveness by trylocking his journal. If we get the lock, |
| * we drop it here. Return 0 if we got the lock, -EAGAIN if node is |
| * still alive (we couldn't get the lock) and < 0 on error. */ |
| static int ocfs2_trylock_journal(struct ocfs2_super *osb, |
| int slot_num) |
| { |
| int status, flags; |
| struct inode *inode = NULL; |
| |
| inode = ocfs2_get_system_file_inode(osb, JOURNAL_SYSTEM_INODE, |
| slot_num); |
| if (inode == NULL) { |
| mlog(ML_ERROR, "access error\n"); |
| status = -EACCES; |
| goto bail; |
| } |
| if (is_bad_inode(inode)) { |
| mlog(ML_ERROR, "access error (bad inode)\n"); |
| iput(inode); |
| inode = NULL; |
| status = -EACCES; |
| goto bail; |
| } |
| SET_INODE_JOURNAL(inode); |
| |
| flags = OCFS2_META_LOCK_RECOVERY | OCFS2_META_LOCK_NOQUEUE; |
| status = ocfs2_meta_lock_full(inode, NULL, NULL, 1, flags); |
| if (status < 0) { |
| if (status != -EAGAIN) |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| ocfs2_meta_unlock(inode, 1); |
| bail: |
| if (inode) |
| iput(inode); |
| |
| return status; |
| } |
| |
| /* Call this underneath ocfs2_super_lock. It also assumes that the |
| * slot info struct has been updated from disk. */ |
| int ocfs2_mark_dead_nodes(struct ocfs2_super *osb) |
| { |
| int status, i, node_num; |
| struct ocfs2_slot_info *si = osb->slot_info; |
| |
| /* This is called with the super block cluster lock, so we |
| * know that the slot map can't change underneath us. */ |
| |
| spin_lock(&si->si_lock); |
| for(i = 0; i < si->si_num_slots; i++) { |
| if (i == osb->slot_num) |
| continue; |
| if (ocfs2_is_empty_slot(si, i)) |
| continue; |
| |
| node_num = si->si_global_node_nums[i]; |
| if (ocfs2_node_map_test_bit(osb, &osb->recovery_map, node_num)) |
| continue; |
| spin_unlock(&si->si_lock); |
| |
| /* Ok, we have a slot occupied by another node which |
| * is not in the recovery map. We trylock his journal |
| * file here to test if he's alive. */ |
| status = ocfs2_trylock_journal(osb, i); |
| if (!status) { |
| /* Since we're called from mount, we know that |
| * the recovery thread can't race us on |
| * setting / checking the recovery bits. */ |
| ocfs2_recovery_thread(osb, node_num); |
| } else if ((status < 0) && (status != -EAGAIN)) { |
| mlog_errno(status); |
| goto bail; |
| } |
| |
| spin_lock(&si->si_lock); |
| } |
| spin_unlock(&si->si_lock); |
| |
| status = 0; |
| bail: |
| mlog_exit(status); |
| return status; |
| } |
| |
| static int ocfs2_queue_orphans(struct ocfs2_super *osb, |
| int slot, |
| struct inode **head) |
| { |
| int status; |
| struct inode *orphan_dir_inode = NULL; |
| struct inode *iter; |
| unsigned long offset, blk, local; |
| struct buffer_head *bh = NULL; |
| struct ocfs2_dir_entry *de; |
| struct super_block *sb = osb->sb; |
| |
| orphan_dir_inode = ocfs2_get_system_file_inode(osb, |
| ORPHAN_DIR_SYSTEM_INODE, |
| slot); |
| if (!orphan_dir_inode) { |
| status = -ENOENT; |
| mlog_errno(status); |
| return status; |
| } |
| |
| mutex_lock(&orphan_dir_inode->i_mutex); |
| status = ocfs2_meta_lock(orphan_dir_inode, NULL, NULL, 0); |
| if (status < 0) { |
| mlog_errno(status); |
| goto out; |
| } |
| |
| offset = 0; |
| iter = NULL; |
| while(offset < i_size_read(orphan_dir_inode)) { |
| blk = offset >> sb->s_blocksize_bits; |
| |
| bh = ocfs2_bread(orphan_dir_inode, blk, &status, 0); |
| if (!bh) |
| status = -EINVAL; |
| if (status < 0) { |
| if (bh) |
| brelse(bh); |
| mlog_errno(status); |
| goto out_unlock; |
| } |
| |
| local = 0; |
| while(offset < i_size_read(orphan_dir_inode) |
| && local < sb->s_blocksize) { |
| de = (struct ocfs2_dir_entry *) (bh->b_data + local); |
| |
| if (!ocfs2_check_dir_entry(orphan_dir_inode, |
| de, bh, local)) { |
| status = -EINVAL; |
| mlog_errno(status); |
| brelse(bh); |
| goto out_unlock; |
| } |
| |
| local += le16_to_cpu(de->rec_len); |
| offset += le16_to_cpu(de->rec_len); |
| |
| /* I guess we silently fail on no inode? */ |
| if (!le64_to_cpu(de->inode)) |
| continue; |
| if (de->file_type > OCFS2_FT_MAX) { |
| mlog(ML_ERROR, |
| "block %llu contains invalid de: " |
| "inode = %llu, rec_len = %u, " |
| "name_len = %u, file_type = %u, " |
| "name='%.*s'\n", |
| (unsigned long long)bh->b_blocknr, |
| (unsigned long long)le64_to_cpu(de->inode), |
| le16_to_cpu(de->rec_len), |
| de->name_len, |
| de->file_type, |
| de->name_len, |
| de->name); |
| continue; |
| } |
| if (de->name_len == 1 && !strncmp(".", de->name, 1)) |
| continue; |
| if (de->name_len == 2 && !strncmp("..", de->name, 2)) |
| continue; |
| |
| iter = ocfs2_iget(osb, le64_to_cpu(de->inode)); |
| if (IS_ERR(iter)) |
| continue; |
| |
| mlog(0, "queue orphan %llu\n", |
| (unsigned long long)OCFS2_I(iter)->ip_blkno); |
| /* No locking is required for the next_orphan |
| * queue as there is only ever a single |
| * process doing orphan recovery. */ |
| OCFS2_I(iter)->ip_next_orphan = *head; |
| *head = iter; |
| } |
| brelse(bh); |
| } |
| |
| out_unlock: |
| ocfs2_meta_unlock(orphan_dir_inode, 0); |
| out: |
| mutex_unlock(&orphan_dir_inode->i_mutex); |
| iput(orphan_dir_inode); |
| return status; |
| } |
| |
| static int ocfs2_orphan_recovery_can_continue(struct ocfs2_super *osb, |
| int slot) |
| { |
| int ret; |
| |
| spin_lock(&osb->osb_lock); |
| ret = !osb->osb_orphan_wipes[slot]; |
| spin_unlock(&osb->osb_lock); |
| return ret; |
| } |
| |
| static void ocfs2_mark_recovering_orphan_dir(struct ocfs2_super *osb, |
| int slot) |
| { |
| spin_lock(&osb->osb_lock); |
| /* Mark ourselves such that new processes in delete_inode() |
| * know to quit early. */ |
| ocfs2_node_map_set_bit(osb, &osb->osb_recovering_orphan_dirs, slot); |
| while (osb->osb_orphan_wipes[slot]) { |
| /* If any processes are already in the middle of an |
| * orphan wipe on this dir, then we need to wait for |
| * them. */ |
| spin_unlock(&osb->osb_lock); |
| wait_event_interruptible(osb->osb_wipe_event, |
| ocfs2_orphan_recovery_can_continue(osb, slot)); |
| spin_lock(&osb->osb_lock); |
| } |
| spin_unlock(&osb->osb_lock); |
| } |
| |
| static void ocfs2_clear_recovering_orphan_dir(struct ocfs2_super *osb, |
| int slot) |
| { |
| ocfs2_node_map_clear_bit(osb, &osb->osb_recovering_orphan_dirs, slot); |
| } |
| |
| /* |
| * Orphan recovery. Each mounted node has it's own orphan dir which we |
| * must run during recovery. Our strategy here is to build a list of |
| * the inodes in the orphan dir and iget/iput them. The VFS does |
| * (most) of the rest of the work. |
| * |
| * Orphan recovery can happen at any time, not just mount so we have a |
| * couple of extra considerations. |
| * |
| * - We grab as many inodes as we can under the orphan dir lock - |
| * doing iget() outside the orphan dir risks getting a reference on |
| * an invalid inode. |
| * - We must be sure not to deadlock with other processes on the |
| * system wanting to run delete_inode(). This can happen when they go |
| * to lock the orphan dir and the orphan recovery process attempts to |
| * iget() inside the orphan dir lock. This can be avoided by |
| * advertising our state to ocfs2_delete_inode(). |
| */ |
| static int ocfs2_recover_orphans(struct ocfs2_super *osb, |
| int slot) |
| { |
| int ret = 0; |
| struct inode *inode = NULL; |
| struct inode *iter; |
| struct ocfs2_inode_info *oi; |
| |
| mlog(0, "Recover inodes from orphan dir in slot %d\n", slot); |
| |
| ocfs2_mark_recovering_orphan_dir(osb, slot); |
| ret = ocfs2_queue_orphans(osb, slot, &inode); |
| ocfs2_clear_recovering_orphan_dir(osb, slot); |
| |
| /* Error here should be noted, but we want to continue with as |
| * many queued inodes as we've got. */ |
| if (ret) |
| mlog_errno(ret); |
| |
| while (inode) { |
| oi = OCFS2_I(inode); |
| mlog(0, "iput orphan %llu\n", (unsigned long long)oi->ip_blkno); |
| |
| iter = oi->ip_next_orphan; |
| |
| spin_lock(&oi->ip_lock); |
| /* Delete voting may have set these on the assumption |
| * that the other node would wipe them successfully. |
| * If they are still in the node's orphan dir, we need |
| * to reset that state. */ |
| oi->ip_flags &= ~(OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE); |
| |
| /* Set the proper information to get us going into |
| * ocfs2_delete_inode. */ |
| oi->ip_flags |= OCFS2_INODE_MAYBE_ORPHANED; |
| oi->ip_orphaned_slot = slot; |
| spin_unlock(&oi->ip_lock); |
| |
| iput(inode); |
| |
| inode = iter; |
| } |
| |
| return ret; |
| } |
| |
| static int ocfs2_wait_on_mount(struct ocfs2_super *osb) |
| { |
| /* This check is good because ocfs2 will wait on our recovery |
| * thread before changing it to something other than MOUNTED |
| * or DISABLED. */ |
| wait_event(osb->osb_mount_event, |
| atomic_read(&osb->vol_state) == VOLUME_MOUNTED || |
| atomic_read(&osb->vol_state) == VOLUME_DISABLED); |
| |
| /* If there's an error on mount, then we may never get to the |
| * MOUNTED flag, but this is set right before |
| * dismount_volume() so we can trust it. */ |
| if (atomic_read(&osb->vol_state) == VOLUME_DISABLED) { |
| mlog(0, "mount error, exiting!\n"); |
| return -EBUSY; |
| } |
| |
| return 0; |
| } |
| |
| static int ocfs2_commit_thread(void *arg) |
| { |
| int status; |
| struct ocfs2_super *osb = arg; |
| struct ocfs2_journal *journal = osb->journal; |
| |
| /* we can trust j_num_trans here because _should_stop() is only set in |
| * shutdown and nobody other than ourselves should be able to start |
| * transactions. committing on shutdown might take a few iterations |
| * as final transactions put deleted inodes on the list */ |
| while (!(kthread_should_stop() && |
| atomic_read(&journal->j_num_trans) == 0)) { |
| |
| wait_event_interruptible(osb->checkpoint_event, |
| atomic_read(&journal->j_num_trans) |
| || kthread_should_stop()); |
| |
| status = ocfs2_commit_cache(osb); |
| if (status < 0) |
| mlog_errno(status); |
| |
| if (kthread_should_stop() && atomic_read(&journal->j_num_trans)){ |
| mlog(ML_KTHREAD, |
| "commit_thread: %u transactions pending on " |
| "shutdown\n", |
| atomic_read(&journal->j_num_trans)); |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* Look for a dirty journal without taking any cluster locks. Used for |
| * hard readonly access to determine whether the file system journals |
| * require recovery. */ |
| int ocfs2_check_journals_nolocks(struct ocfs2_super *osb) |
| { |
| int ret = 0; |
| unsigned int slot; |
| struct buffer_head *di_bh; |
| struct ocfs2_dinode *di; |
| struct inode *journal = NULL; |
| |
| for(slot = 0; slot < osb->max_slots; slot++) { |
| journal = ocfs2_get_system_file_inode(osb, |
| JOURNAL_SYSTEM_INODE, |
| slot); |
| if (!journal || is_bad_inode(journal)) { |
| ret = -EACCES; |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| di_bh = NULL; |
| ret = ocfs2_read_block(osb, OCFS2_I(journal)->ip_blkno, &di_bh, |
| 0, journal); |
| if (ret < 0) { |
| mlog_errno(ret); |
| goto out; |
| } |
| |
| di = (struct ocfs2_dinode *) di_bh->b_data; |
| |
| if (le32_to_cpu(di->id1.journal1.ij_flags) & |
| OCFS2_JOURNAL_DIRTY_FL) |
| ret = -EROFS; |
| |
| brelse(di_bh); |
| if (ret) |
| break; |
| } |
| |
| out: |
| if (journal) |
| iput(journal); |
| |
| return ret; |
| } |