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