journal.h File Reference

#include <stdint.h>
#include "libjio.h"

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Data Structures
struct	journal_op
Typedefs
typedef struct journal_op	jop_t
Functions
struct journal_op *	journal_new (struct jfs *fs, unsigned int flags)
	Create a new transaction in the journal.
int	journal_add_op (struct journal_op *jop, unsigned char *buf, size_t len, off_t offset)
	Save a single operation in the journal file.
void	journal_pre_commit (struct journal_op *jop)
	Prepares to commit the operation.
int	journal_commit (struct journal_op *jop)
	Commit the journal operation.
int	journal_free (struct journal_op *jop, int do_unlink)
	Free a journal operation.
int	fill_trans (unsigned char *map, off_t len, struct jtrans *ts)
	Fill a transaction structure from a mmapped transaction file.

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Typedef Documentation

typedef struct journal_op jop_t

Definition at line 18 of file journal.h.

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Function Documentation

struct journal_op* journal_new	(	struct jfs *	fs,
		unsigned int	flags
	)			[read]

Create a new transaction in the journal.

Returns a pointer to an opaque jop_t (that is freed using journal_free), or NULL if there was an error.

Definition at line 260 of file journal.c.

Referenced by jtrans_commit().

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int journal_add_op	(	struct journal_op *	jop,
		unsigned char *	buf,
		size_t	len,
		off_t	offset
	)

Save a single operation in the journal file.

Definition at line 334 of file journal.c.

Referenced by jtrans_commit().

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void journal_pre_commit

(

struct journal_op *

jop

)

Prepares to commit the operation.

Can be omitted.

Definition at line 371 of file journal.c.

Referenced by jtrans_commit().

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int journal_commit

(

struct journal_op *

jop

)

Commit the journal operation.

Definition at line 380 of file journal.c.

Referenced by jtrans_commit().

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int journal_free	(	struct journal_op *	jop,
		int	do_unlink
	)

Free a journal operation.

NOTE: It can't assume the save completed successfuly, so we can call it when journal_save() fails.

Definition at line 428 of file journal.c.

Referenced by jsync(), and jtrans_commit().

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int fill_trans	(	unsigned char *	map,
		off_t	len,
		struct jtrans *	ts
	)

Fill a transaction structure from a mmapped transaction file.

Useful for checking purposes.

Returns:

0 on success, -1 if the file was broken, -2 if the checksums didn't match

Definition at line 476 of file journal.c.

Referenced by jfsck().

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