dfa13f39b7
The ocfs2 directory index updates two blocks when we remove an entry - the dx root and the dx leaf. OCFS2_DELETE_INODE_CREDITS was only accounting for the dx leaf. This shows up when ocfs2_delete_inode() runs out of credits in jbd2_journal_dirty_metadata() at "J_ASSERT_JH(jh, handle->h_buffer_credits > 0);". The test that caught this was running dirop_file_racer from the ocfs2-test suite with a 250-character filename PREFIX. Run on a 512B blocksize, it forces the orphan dir index to grow large enough to trigger. Signed-off-by: Joel Becker <joel.becker@oracle.com>
571 lines
20 KiB
C
571 lines
20 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* journal.h
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*
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* Defines journalling api and structures.
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*
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* Copyright (C) 2003, 2005 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef OCFS2_JOURNAL_H
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#define OCFS2_JOURNAL_H
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#include <linux/fs.h>
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#include <linux/jbd2.h>
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enum ocfs2_journal_state {
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OCFS2_JOURNAL_FREE = 0,
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OCFS2_JOURNAL_LOADED,
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OCFS2_JOURNAL_IN_SHUTDOWN,
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};
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struct ocfs2_super;
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struct ocfs2_dinode;
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/*
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* The recovery_list is a simple linked list of node numbers to recover.
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* It is protected by the recovery_lock.
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*/
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struct ocfs2_recovery_map {
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unsigned int rm_used;
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unsigned int *rm_entries;
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};
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struct ocfs2_journal {
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enum ocfs2_journal_state j_state; /* Journals current state */
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journal_t *j_journal; /* The kernels journal type */
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struct inode *j_inode; /* Kernel inode pointing to
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* this journal */
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struct ocfs2_super *j_osb; /* pointer to the super
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* block for the node
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* we're currently
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* running on -- not
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* necessarily the super
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* block from the node
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* which we usually run
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* from (recovery,
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* etc) */
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struct buffer_head *j_bh; /* Journal disk inode block */
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atomic_t j_num_trans; /* Number of transactions
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* currently in the system. */
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unsigned long j_trans_id;
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struct rw_semaphore j_trans_barrier;
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wait_queue_head_t j_checkpointed;
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spinlock_t j_lock;
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struct list_head j_la_cleanups;
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struct work_struct j_recovery_work;
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};
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extern spinlock_t trans_inc_lock;
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/* wrap j_trans_id so we never have it equal to zero. */
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static inline unsigned long ocfs2_inc_trans_id(struct ocfs2_journal *j)
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{
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unsigned long old_id;
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spin_lock(&trans_inc_lock);
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old_id = j->j_trans_id++;
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if (unlikely(!j->j_trans_id))
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j->j_trans_id = 1;
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spin_unlock(&trans_inc_lock);
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return old_id;
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}
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static inline void ocfs2_set_inode_lock_trans(struct ocfs2_journal *journal,
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struct inode *inode)
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{
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spin_lock(&trans_inc_lock);
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OCFS2_I(inode)->ip_last_trans = journal->j_trans_id;
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spin_unlock(&trans_inc_lock);
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}
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/* Used to figure out whether it's safe to drop a metadata lock on an
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* inode. Returns true if all the inodes changes have been
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* checkpointed to disk. You should be holding the spinlock on the
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* metadata lock while calling this to be sure that nobody can take
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* the lock and put it on another transaction. */
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static inline int ocfs2_inode_fully_checkpointed(struct inode *inode)
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{
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int ret;
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struct ocfs2_journal *journal = OCFS2_SB(inode->i_sb)->journal;
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spin_lock(&trans_inc_lock);
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ret = time_after(journal->j_trans_id, OCFS2_I(inode)->ip_last_trans);
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spin_unlock(&trans_inc_lock);
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return ret;
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}
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/* convenience function to check if an inode is still new (has never
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* hit disk) Will do you a favor and set created_trans = 0 when you've
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* been checkpointed. returns '1' if the inode is still new. */
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static inline int ocfs2_inode_is_new(struct inode *inode)
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{
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int ret;
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/* System files are never "new" as they're written out by
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* mkfs. This helps us early during mount, before we have the
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* journal open and j_trans_id could be junk. */
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if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_SYSTEM_FILE)
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return 0;
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spin_lock(&trans_inc_lock);
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ret = !(time_after(OCFS2_SB(inode->i_sb)->journal->j_trans_id,
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OCFS2_I(inode)->ip_created_trans));
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if (!ret)
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OCFS2_I(inode)->ip_created_trans = 0;
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spin_unlock(&trans_inc_lock);
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return ret;
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}
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static inline void ocfs2_inode_set_new(struct ocfs2_super *osb,
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struct inode *inode)
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{
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spin_lock(&trans_inc_lock);
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OCFS2_I(inode)->ip_created_trans = osb->journal->j_trans_id;
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spin_unlock(&trans_inc_lock);
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}
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/* Exported only for the journal struct init code in super.c. Do not call. */
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void ocfs2_complete_recovery(struct work_struct *work);
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void ocfs2_wait_for_recovery(struct ocfs2_super *osb);
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int ocfs2_recovery_init(struct ocfs2_super *osb);
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void ocfs2_recovery_exit(struct ocfs2_super *osb);
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int ocfs2_compute_replay_slots(struct ocfs2_super *osb);
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/*
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* Journal Control:
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* Initialize, Load, Shutdown, Wipe a journal.
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*
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* ocfs2_journal_init - Initialize journal structures in the OSB.
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* ocfs2_journal_load - Load the given journal off disk. Replay it if
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* there's transactions still in there.
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* ocfs2_journal_shutdown - Shutdown a journal, this will flush all
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* uncommitted, uncheckpointed transactions.
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* ocfs2_journal_wipe - Wipe transactions from a journal. Optionally
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* zero out each block.
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* ocfs2_recovery_thread - Perform recovery on a node. osb is our own osb.
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* ocfs2_mark_dead_nodes - Start recovery on nodes we won't get a heartbeat
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* event on.
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* ocfs2_start_checkpoint - Kick the commit thread to do a checkpoint.
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*/
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void ocfs2_set_journal_params(struct ocfs2_super *osb);
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int ocfs2_journal_init(struct ocfs2_journal *journal,
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int *dirty);
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void ocfs2_journal_shutdown(struct ocfs2_super *osb);
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int ocfs2_journal_wipe(struct ocfs2_journal *journal,
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int full);
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int ocfs2_journal_load(struct ocfs2_journal *journal, int local,
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int replayed);
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int ocfs2_check_journals_nolocks(struct ocfs2_super *osb);
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void ocfs2_recovery_thread(struct ocfs2_super *osb,
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int node_num);
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int ocfs2_mark_dead_nodes(struct ocfs2_super *osb);
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void ocfs2_complete_mount_recovery(struct ocfs2_super *osb);
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void ocfs2_complete_quota_recovery(struct ocfs2_super *osb);
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static inline void ocfs2_start_checkpoint(struct ocfs2_super *osb)
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{
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atomic_set(&osb->needs_checkpoint, 1);
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wake_up(&osb->checkpoint_event);
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}
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static inline void ocfs2_checkpoint_inode(struct inode *inode)
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{
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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if (ocfs2_mount_local(osb))
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return;
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if (!ocfs2_inode_fully_checkpointed(inode)) {
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/* WARNING: This only kicks off a single
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* checkpoint. If someone races you and adds more
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* metadata to the journal, you won't know, and will
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* wind up waiting *alot* longer than necessary. Right
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* now we only use this in clear_inode so that's
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* OK. */
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ocfs2_start_checkpoint(osb);
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wait_event(osb->journal->j_checkpointed,
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ocfs2_inode_fully_checkpointed(inode));
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}
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}
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/*
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* Transaction Handling:
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* Manage the lifetime of a transaction handle.
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*
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* ocfs2_start_trans - Begin a transaction. Give it an upper estimate of
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* the number of blocks that will be changed during
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* this handle.
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* ocfs2_commit_trans - Complete a handle. It might return -EIO if
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* the journal was aborted. The majority of paths don't
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* check the return value as an error there comes too
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* late to do anything (and will be picked up in a
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* later transaction).
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* ocfs2_extend_trans - Extend a handle by nblocks credits. This may
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* commit the handle to disk in the process, but will
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* not release any locks taken during the transaction.
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* ocfs2_journal_access* - Notify the handle that we want to journal this
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* buffer. Will have to call ocfs2_journal_dirty once
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* we've actually dirtied it. Type is one of . or .
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* Always call the specific flavor of
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* ocfs2_journal_access_*() unless you intend to
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* manage the checksum by hand.
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* ocfs2_journal_dirty - Mark a journalled buffer as having dirty data.
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* ocfs2_jbd2_file_inode - Mark an inode so that its data goes out before
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* the current handle commits.
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*/
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/* You must always start_trans with a number of buffs > 0, but it's
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* perfectly legal to go through an entire transaction without having
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* dirtied any buffers. */
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handle_t *ocfs2_start_trans(struct ocfs2_super *osb,
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int max_buffs);
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int ocfs2_commit_trans(struct ocfs2_super *osb,
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handle_t *handle);
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int ocfs2_extend_trans(handle_t *handle, int nblocks);
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/*
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* Create access is for when we get a newly created buffer and we're
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* not gonna read it off disk, but rather fill it ourselves. Right
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* now, we don't do anything special with this (it turns into a write
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* request), but this is a good placeholder in case we do...
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*
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* Write access is for when we read a block off disk and are going to
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* modify it. This way the journalling layer knows it may need to make
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* a copy of that block (if it's part of another, uncommitted
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* transaction) before we do so.
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*/
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#define OCFS2_JOURNAL_ACCESS_CREATE 0
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#define OCFS2_JOURNAL_ACCESS_WRITE 1
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#define OCFS2_JOURNAL_ACCESS_UNDO 2
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/* ocfs2_inode */
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int ocfs2_journal_access_di(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, int type);
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/* ocfs2_extent_block */
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int ocfs2_journal_access_eb(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, int type);
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/* ocfs2_group_desc */
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int ocfs2_journal_access_gd(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, int type);
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/* ocfs2_xattr_block */
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int ocfs2_journal_access_xb(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, int type);
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/* quota blocks */
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int ocfs2_journal_access_dq(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, int type);
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/* dirblock */
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int ocfs2_journal_access_db(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, int type);
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/* ocfs2_dx_root_block */
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int ocfs2_journal_access_dr(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, int type);
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/* ocfs2_dx_leaf */
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int ocfs2_journal_access_dl(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, int type);
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/* Anything that has no ecc */
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int ocfs2_journal_access(handle_t *handle, struct inode *inode,
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struct buffer_head *bh, int type);
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/*
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* A word about the journal_access/journal_dirty "dance". It is
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* entirely legal to journal_access a buffer more than once (as long
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* as the access type is the same -- I'm not sure what will happen if
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* access type is different but this should never happen anyway) It is
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* also legal to journal_dirty a buffer more than once. In fact, you
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* can even journal_access a buffer after you've done a
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* journal_access/journal_dirty pair. The only thing you cannot do
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* however, is journal_dirty a buffer which you haven't yet passed to
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* journal_access at least once.
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*
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* That said, 99% of the time this doesn't matter and this is what the
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* path looks like:
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*
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* <read a bh>
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* ocfs2_journal_access(handle, bh, OCFS2_JOURNAL_ACCESS_WRITE);
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* <modify the bh>
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* ocfs2_journal_dirty(handle, bh);
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*/
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int ocfs2_journal_dirty(handle_t *handle,
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struct buffer_head *bh);
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/*
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* Credit Macros:
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* Convenience macros to calculate number of credits needed.
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*
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* For convenience sake, I have a set of macros here which calculate
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* the *maximum* number of sectors which will be changed for various
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* metadata updates.
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*/
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/* simple file updates like chmod, etc. */
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#define OCFS2_INODE_UPDATE_CREDITS 1
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/* extended attribute block update */
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#define OCFS2_XATTR_BLOCK_UPDATE_CREDITS 1
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/* global quotafile inode update, data block */
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#define OCFS2_QINFO_WRITE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
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/*
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* The two writes below can accidentally see global info dirty due
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* to set_info() quotactl so make them prepared for the writes.
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*/
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/* quota data block, global info */
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/* Write to local quota file */
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#define OCFS2_QWRITE_CREDITS (OCFS2_QINFO_WRITE_CREDITS + 1)
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/* global quota data block, local quota data block, global quota inode,
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* global quota info */
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#define OCFS2_QSYNC_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 3)
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static inline int ocfs2_quota_trans_credits(struct super_block *sb)
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{
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int credits = 0;
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if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_USRQUOTA))
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credits += OCFS2_QWRITE_CREDITS;
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if (OCFS2_HAS_RO_COMPAT_FEATURE(sb, OCFS2_FEATURE_RO_COMPAT_GRPQUOTA))
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credits += OCFS2_QWRITE_CREDITS;
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return credits;
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}
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/* Number of credits needed for removing quota structure from file */
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int ocfs2_calc_qdel_credits(struct super_block *sb, int type);
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/* Number of credits needed for initialization of new quota structure */
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int ocfs2_calc_qinit_credits(struct super_block *sb, int type);
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/* group extend. inode update and last group update. */
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#define OCFS2_GROUP_EXTEND_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
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/* group add. inode update and the new group update. */
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#define OCFS2_GROUP_ADD_CREDITS (OCFS2_INODE_UPDATE_CREDITS + 1)
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/* get one bit out of a suballocator: dinode + group descriptor +
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* prev. group desc. if we relink. */
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#define OCFS2_SUBALLOC_ALLOC (3)
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static inline int ocfs2_inline_to_extents_credits(struct super_block *sb)
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{
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return OCFS2_SUBALLOC_ALLOC + OCFS2_INODE_UPDATE_CREDITS +
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ocfs2_quota_trans_credits(sb);
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}
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/* dinode + group descriptor update. We don't relink on free yet. */
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#define OCFS2_SUBALLOC_FREE (2)
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#define OCFS2_TRUNCATE_LOG_UPDATE OCFS2_INODE_UPDATE_CREDITS
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#define OCFS2_TRUNCATE_LOG_FLUSH_ONE_REC (OCFS2_SUBALLOC_FREE \
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+ OCFS2_TRUNCATE_LOG_UPDATE)
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static inline int ocfs2_remove_extent_credits(struct super_block *sb)
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{
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return OCFS2_TRUNCATE_LOG_UPDATE + OCFS2_INODE_UPDATE_CREDITS +
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ocfs2_quota_trans_credits(sb);
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}
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/* data block for new dir/symlink, 2 for bitmap updates (bitmap fe +
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* bitmap block for the new bit) dx_root update for free list */
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#define OCFS2_DIR_LINK_ADDITIONAL_CREDITS (1 + 2 + 1)
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static inline int ocfs2_add_dir_index_credits(struct super_block *sb)
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{
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/* 1 block for index, 2 allocs (data, metadata), 1 clusters
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* worth of blocks for initial extent. */
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return 1 + 2 * OCFS2_SUBALLOC_ALLOC +
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ocfs2_clusters_to_blocks(sb, 1);
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}
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/* parent fe, parent block, new file entry, index leaf, inode alloc fe, inode
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* alloc group descriptor + mkdir/symlink blocks + dir blocks + xattr
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* blocks + quota update */
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static inline int ocfs2_mknod_credits(struct super_block *sb, int is_dir,
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int xattr_credits)
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{
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int dir_credits = OCFS2_DIR_LINK_ADDITIONAL_CREDITS;
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if (is_dir)
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dir_credits += ocfs2_add_dir_index_credits(sb);
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return 4 + OCFS2_SUBALLOC_ALLOC + dir_credits + xattr_credits +
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ocfs2_quota_trans_credits(sb);
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}
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/* local alloc metadata change + main bitmap updates */
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#define OCFS2_WINDOW_MOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS \
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+ OCFS2_SUBALLOC_ALLOC + OCFS2_SUBALLOC_FREE)
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/* used when we don't need an allocation change for a dir extend. One
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* for the dinode, one for the new block. */
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#define OCFS2_SIMPLE_DIR_EXTEND_CREDITS (2)
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/* file update (nlink, etc) + directory mtime/ctime + dir entry block + quota
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* update on dir + index leaf + dx root update for free list */
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static inline int ocfs2_link_credits(struct super_block *sb)
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{
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return 2*OCFS2_INODE_UPDATE_CREDITS + 3 +
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ocfs2_quota_trans_credits(sb);
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}
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/* inode + dir inode (if we unlink a dir), + dir entry block + orphan
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* dir inode link + dir inode index leaf + dir index root */
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static inline int ocfs2_unlink_credits(struct super_block *sb)
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{
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/* The quota update from ocfs2_link_credits is unused here... */
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return 2 * OCFS2_INODE_UPDATE_CREDITS + 3 + ocfs2_link_credits(sb);
|
|
}
|
|
|
|
/* dinode + orphan dir dinode + inode alloc dinode + orphan dir entry +
|
|
* inode alloc group descriptor + orphan dir index root +
|
|
* orphan dir index leaf */
|
|
#define OCFS2_DELETE_INODE_CREDITS (3 * OCFS2_INODE_UPDATE_CREDITS + 4)
|
|
|
|
/* dinode update, old dir dinode update, new dir dinode update, old
|
|
* dir dir entry, new dir dir entry, dir entry update for renaming
|
|
* directory + target unlink + 3 x dir index leaves */
|
|
static inline int ocfs2_rename_credits(struct super_block *sb)
|
|
{
|
|
return 3 * OCFS2_INODE_UPDATE_CREDITS + 6 + ocfs2_unlink_credits(sb);
|
|
}
|
|
|
|
/* global bitmap dinode, group desc., relinked group,
|
|
* suballocator dinode, group desc., relinked group,
|
|
* dinode, xattr block */
|
|
#define OCFS2_XATTR_BLOCK_CREATE_CREDITS (OCFS2_SUBALLOC_ALLOC * 2 + \
|
|
+ OCFS2_INODE_UPDATE_CREDITS \
|
|
+ OCFS2_XATTR_BLOCK_UPDATE_CREDITS)
|
|
|
|
/* inode update, removal of dx root block from allocator */
|
|
#define OCFS2_DX_ROOT_REMOVE_CREDITS (OCFS2_INODE_UPDATE_CREDITS + \
|
|
OCFS2_SUBALLOC_FREE)
|
|
|
|
static inline int ocfs2_calc_dxi_expand_credits(struct super_block *sb)
|
|
{
|
|
int credits = 1 + OCFS2_SUBALLOC_ALLOC;
|
|
|
|
credits += ocfs2_clusters_to_blocks(sb, 1);
|
|
credits += ocfs2_quota_trans_credits(sb);
|
|
|
|
return credits;
|
|
}
|
|
|
|
/*
|
|
* Please note that the caller must make sure that root_el is the root
|
|
* of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise
|
|
* the result may be wrong.
|
|
*/
|
|
static inline int ocfs2_calc_extend_credits(struct super_block *sb,
|
|
struct ocfs2_extent_list *root_el,
|
|
u32 bits_wanted)
|
|
{
|
|
int bitmap_blocks, sysfile_bitmap_blocks, extent_blocks;
|
|
|
|
/* bitmap dinode, group desc. + relinked group. */
|
|
bitmap_blocks = OCFS2_SUBALLOC_ALLOC;
|
|
|
|
/* we might need to shift tree depth so lets assume an
|
|
* absolute worst case of complete fragmentation. Even with
|
|
* that, we only need one update for the dinode, and then
|
|
* however many metadata chunks needed * a remaining suballoc
|
|
* alloc. */
|
|
sysfile_bitmap_blocks = 1 +
|
|
(OCFS2_SUBALLOC_ALLOC - 1) * ocfs2_extend_meta_needed(root_el);
|
|
|
|
/* this does not include *new* metadata blocks, which are
|
|
* accounted for in sysfile_bitmap_blocks. root_el +
|
|
* prev. last_eb_blk + blocks along edge of tree.
|
|
* calc_symlink_credits passes because we just need 1
|
|
* credit for the dinode there. */
|
|
extent_blocks = 1 + 1 + le16_to_cpu(root_el->l_tree_depth);
|
|
|
|
return bitmap_blocks + sysfile_bitmap_blocks + extent_blocks +
|
|
ocfs2_quota_trans_credits(sb);
|
|
}
|
|
|
|
static inline int ocfs2_calc_symlink_credits(struct super_block *sb)
|
|
{
|
|
int blocks = ocfs2_mknod_credits(sb, 0, 0);
|
|
|
|
/* links can be longer than one block so we may update many
|
|
* within our single allocated extent. */
|
|
blocks += ocfs2_clusters_to_blocks(sb, 1);
|
|
|
|
return blocks + ocfs2_quota_trans_credits(sb);
|
|
}
|
|
|
|
static inline int ocfs2_calc_group_alloc_credits(struct super_block *sb,
|
|
unsigned int cpg)
|
|
{
|
|
int blocks;
|
|
int bitmap_blocks = OCFS2_SUBALLOC_ALLOC + 1;
|
|
/* parent inode update + new block group header + bitmap inode update
|
|
+ bitmap blocks affected */
|
|
blocks = 1 + 1 + 1 + bitmap_blocks;
|
|
return blocks;
|
|
}
|
|
|
|
static inline int ocfs2_calc_tree_trunc_credits(struct super_block *sb,
|
|
unsigned int clusters_to_del,
|
|
struct ocfs2_dinode *fe,
|
|
struct ocfs2_extent_list *last_el)
|
|
{
|
|
/* for dinode + all headers in this pass + update to next leaf */
|
|
u16 next_free = le16_to_cpu(last_el->l_next_free_rec);
|
|
u16 tree_depth = le16_to_cpu(fe->id2.i_list.l_tree_depth);
|
|
int credits = 1 + tree_depth + 1;
|
|
int i;
|
|
|
|
i = next_free - 1;
|
|
BUG_ON(i < 0);
|
|
|
|
/* We may be deleting metadata blocks, so metadata alloc dinode +
|
|
one desc. block for each possible delete. */
|
|
if (tree_depth && next_free == 1 &&
|
|
ocfs2_rec_clusters(last_el, &last_el->l_recs[i]) == clusters_to_del)
|
|
credits += 1 + tree_depth;
|
|
|
|
/* update to the truncate log. */
|
|
credits += OCFS2_TRUNCATE_LOG_UPDATE;
|
|
|
|
credits += ocfs2_quota_trans_credits(sb);
|
|
|
|
return credits;
|
|
}
|
|
|
|
static inline int ocfs2_jbd2_file_inode(handle_t *handle, struct inode *inode)
|
|
{
|
|
return jbd2_journal_file_inode(handle, &OCFS2_I(inode)->ip_jinode);
|
|
}
|
|
|
|
static inline int ocfs2_begin_ordered_truncate(struct inode *inode,
|
|
loff_t new_size)
|
|
{
|
|
return jbd2_journal_begin_ordered_truncate(
|
|
OCFS2_SB(inode->i_sb)->journal->j_journal,
|
|
&OCFS2_I(inode)->ip_jinode,
|
|
new_size);
|
|
}
|
|
|
|
#endif /* OCFS2_JOURNAL_H */
|