148 lines
4 KiB
C
148 lines
4 KiB
C
/*
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* Copyright (c) 2015 Grzegorz Kostka (kostka.grzegorz@gmail.com)
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* Copyright (c) 2015 Kaho Ng (ngkaho1234@gmail.com)
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* - The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/** @addtogroup lwext4
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* @{
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*/
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/**
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* @file ext4_journal.h
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* @brief Journal handle functions
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*/
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#ifndef EXT4_JOURNAL_H_
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#define EXT4_JOURNAL_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <ext4_config.h>
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#include <ext4_types.h>
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#include <misc/queue.h>
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#include <misc/tree.h>
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struct jbd_fs {
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struct ext4_blockdev *bdev;
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struct ext4_inode_ref inode_ref;
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struct jbd_sb sb;
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bool dirty;
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};
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struct jbd_buf {
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uint32_t jbd_lba;
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struct ext4_block block;
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struct jbd_trans *trans;
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struct jbd_block_rec *block_rec;
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TAILQ_ENTRY(jbd_buf) buf_node;
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TAILQ_ENTRY(jbd_buf) dirty_buf_node;
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};
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struct jbd_revoke_rec {
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ext4_fsblk_t lba;
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RB_ENTRY(jbd_revoke_rec) revoke_node;
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};
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struct jbd_block_rec {
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ext4_fsblk_t lba;
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struct jbd_trans *trans;
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RB_ENTRY(jbd_block_rec) block_rec_node;
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LIST_ENTRY(jbd_block_rec) tbrec_node;
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TAILQ_HEAD(jbd_buf_dirty, jbd_buf) dirty_buf_queue;
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};
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struct jbd_trans {
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uint32_t trans_id;
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uint32_t start_iblock;
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int alloc_blocks;
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int data_cnt;
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uint32_t data_csum;
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int written_cnt;
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int error;
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struct jbd_journal *journal;
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TAILQ_HEAD(jbd_trans_buf, jbd_buf) buf_queue;
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RB_HEAD(jbd_revoke_tree, jbd_revoke_rec) revoke_root;
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LIST_HEAD(jbd_trans_block_rec, jbd_block_rec) tbrec_list;
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TAILQ_ENTRY(jbd_trans) trans_node;
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};
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struct jbd_journal {
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uint32_t first;
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uint32_t start;
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uint32_t last;
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uint32_t trans_id;
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uint32_t alloc_trans_id;
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uint32_t block_size;
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TAILQ_HEAD(jbd_cp_queue, jbd_trans) cp_queue;
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RB_HEAD(jbd_block, jbd_block_rec) block_rec_root;
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struct jbd_fs *jbd_fs;
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};
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int jbd_get_fs(struct ext4_fs *fs,
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struct jbd_fs *jbd_fs);
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int jbd_put_fs(struct jbd_fs *jbd_fs);
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int jbd_inode_bmap(struct jbd_fs *jbd_fs,
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ext4_lblk_t iblock,
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ext4_fsblk_t *fblock);
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int jbd_recover(struct jbd_fs *jbd_fs);
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int jbd_journal_start(struct jbd_fs *jbd_fs,
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struct jbd_journal *journal);
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int jbd_journal_stop(struct jbd_journal *journal);
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struct jbd_trans *
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jbd_journal_new_trans(struct jbd_journal *journal);
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int jbd_trans_set_block_dirty(struct jbd_trans *trans,
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struct ext4_block *block);
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int jbd_trans_revoke_block(struct jbd_trans *trans,
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ext4_fsblk_t lba);
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int jbd_trans_try_revoke_block(struct jbd_trans *trans,
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ext4_fsblk_t lba);
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void jbd_journal_free_trans(struct jbd_journal *journal,
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struct jbd_trans *trans,
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bool abort);
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int jbd_journal_commit_trans(struct jbd_journal *journal,
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struct jbd_trans *trans);
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void
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jbd_journal_purge_cp_trans(struct jbd_journal *journal,
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bool flush,
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bool once);
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#ifdef __cplusplus
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}
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#endif
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#endif /* EXT4_JOURNAL_H_ */
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/**
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* @}
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*/
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