linux/fs/ext4/ext4_jbd2.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Interface between ext4 and JBD
 */

#include "ext4_jbd2.h"

#include <trace/events/ext4.h>

int ext4_inode_journal_mode(struct inode *inode)
{ … }

/* Just increment the non-pointer handle value */
static handle_t *ext4_get_nojournal(void)
{ … }


/* Decrement the non-pointer handle value */
static void ext4_put_nojournal(handle_t *handle)
{ … }

/*
 * Wrappers for jbd2_journal_start/end.
 */
static int ext4_journal_check_start(struct super_block *sb)
{ … }

handle_t *__ext4_journal_start_sb(struct inode *inode,
				  struct super_block *sb, unsigned int line,
				  int type, int blocks, int rsv_blocks,
				  int revoke_creds)
{ … }

int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle)
{ … }

handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line,
					int type)
{ … }

int __ext4_journal_ensure_credits(handle_t *handle, int check_cred,
				  int extend_cred, int revoke_cred)
{ … }

static void ext4_journal_abort_handle(const char *caller, unsigned int line,
				      const char *err_fn,
				      struct buffer_head *bh,
				      handle_t *handle, int err)
{ … }

static void ext4_check_bdev_write_error(struct super_block *sb)
{ … }

int __ext4_journal_get_write_access(const char *where, unsigned int line,
				    handle_t *handle, struct super_block *sb,
				    struct buffer_head *bh,
				    enum ext4_journal_trigger_type trigger_type)
{ … }

/*
 * The ext4 forget function must perform a revoke if we are freeing data
 * which has been journaled.  Metadata (eg. indirect blocks) must be
 * revoked in all cases.
 *
 * "bh" may be NULL: a metadata block may have been freed from memory
 * but there may still be a record of it in the journal, and that record
 * still needs to be revoked.
 */
int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
		  int is_metadata, struct inode *inode,
		  struct buffer_head *bh, ext4_fsblk_t blocknr)
{ … }

int __ext4_journal_get_create_access(const char *where, unsigned int line,
				handle_t *handle, struct super_block *sb,
				struct buffer_head *bh,
				enum ext4_journal_trigger_type trigger_type)
{ … }

int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
				 handle_t *handle, struct inode *inode,
				 struct buffer_head *bh)
{ … }