--- /dev/null
+/* -*- 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_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_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);
+
+ 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;
+}
git://git.onelab.eu / linux-2.6.git / blobdiff