diff options
Diffstat (limited to 'fs/ocfs2/journal.c')
| -rw-r--r-- | fs/ocfs2/journal.c | 1652 |
1 files changed, 1652 insertions, 0 deletions
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c new file mode 100644 index 0000000..0442804 --- /dev/null +++ b/fs/ocfs2/journal.c @@ -0,0 +1,1652 @@ +/* -*- 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" + +spinlock_t trans_inc_lock = SPIN_LOCK_UNLOCKED; + +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_KERNEL); + 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); + + if (!osb || !osb->journal->j_journal) + BUG(); + + 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... */ + down(&inode->i_sem); + + /* 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_del(&(OCFS2_I(inode)->ip_handle_list)); + list_add_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); + + up(&inode->i_sem); + 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 = %hu\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); + + down(&OCFS2_I(inode)->ip_io_sem); + 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"); + } + up(&OCFS2_I(inode)->ip_io_sem); + + 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 %"MLFu64", I'm doing a last iput for!", + 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++; + + status = ocfs2_meta_lock(inode, NULL, &bh, 1); + 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 = %lu\n", 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 %"MLFu64" has invalid " + "signature: %.*s", 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(); + + if (!osb) + BUG(); + + 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(); + + if (!journal) + BUG(); + + 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 %lu blocks\n", + (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; + + status = ocfs2_read_blocks(OCFS2_SB(inode->i_sb), + p_blkno, p_blocks, bhs, 0, + inode); + 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 %"MLFu64"\n", + 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 %"MLFu64"\n", + 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_KERNEL); + 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: + down(&osb->recovery_lock); + if (!status && + !ocfs2_node_map_is_empty(osb, &osb->recovery_map)) { + up(&osb->recovery_lock); + goto restart; + } + + osb->recovery_thread_task = NULL; + mb(); /* sync with ocfs2_recovery_thread_running */ + wake_up(&osb->recovery_event); + + up(&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); + + down(&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: + up(&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. */ + if (osb->node_num == node_num) + BUG(); + + 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_recover_orphans(struct ocfs2_super *osb, + int slot) +{ + int status = 0; + int have_disk_lock = 0; + struct inode *inode = NULL; + struct inode *iter; + struct inode *orphan_dir_inode = NULL; + unsigned long offset, blk, local; + struct buffer_head *bh = NULL; + struct ocfs2_dir_entry *de; + struct super_block *sb = osb->sb; + struct ocfs2_inode_info *oi; + + mlog(0, "Recover inodes from orphan dir in slot %d\n", slot); + + orphan_dir_inode = ocfs2_get_system_file_inode(osb, + ORPHAN_DIR_SYSTEM_INODE, + slot); + if (!orphan_dir_inode) { + status = -ENOENT; + mlog_errno(status); + goto out; + } + + down(&orphan_dir_inode->i_sem); + status = ocfs2_meta_lock(orphan_dir_inode, NULL, NULL, 0); + if (status < 0) { + up(&orphan_dir_inode->i_sem); + mlog_errno(status); + goto out; + } + have_disk_lock = 1; + + 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) { + up(&orphan_dir_inode->i_sem); + if (bh) + brelse(bh); + mlog_errno(status); + goto out; + } + + 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)) { + up(&orphan_dir_inode->i_sem); + status = -EINVAL; + mlog_errno(status); + brelse(bh); + goto out; + } + + 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 = %"MLFu64", rec_len = %u, " + "name_len = %u, file_type = %u, " + "name='%.*s'\n", + (unsigned long long)bh->b_blocknr, + 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 %"MLFu64"\n", + OCFS2_I(iter)->ip_blkno); + OCFS2_I(iter)->ip_next_orphan = inode; + inode = iter; + } + brelse(bh); + } + up(&orphan_dir_inode->i_sem); + + ocfs2_meta_unlock(orphan_dir_inode, 0); + have_disk_lock = 0; + + iput(orphan_dir_inode); + orphan_dir_inode = NULL; + + while (inode) { + oi = OCFS2_I(inode); + mlog(0, "iput orphan %"MLFu64"\n", 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; + } + +out: + if (have_disk_lock) + ocfs2_meta_unlock(orphan_dir_inode, 0); + + if (orphan_dir_inode) + iput(orphan_dir_inode); + + return status; +} + +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_timeout(osb->checkpoint_event, + atomic_read(&journal->j_num_trans) + || kthread_should_stop(), + OCFS2_CHECKPOINT_INTERVAL); + + 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; +} |
