trans.c File Reference

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include <string.h>
#include <libgen.h>
#include <stdio.h>
#include <dirent.h>
#include <errno.h>
#include <sys/mman.h>
#include "libjio.h"
#include "common.h"
#include "compat.h"
#include "journal.h"
#include "trans.h"

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Functions
struct jtrans *	jtrans_new (struct jfs *fs, unsigned int flags)
	Create a new transaction.
void	jtrans_free (struct jtrans *ts)
	Free a transaction structure.
static int	lock_file_ranges (struct jtrans *ts, int mode)
	Lock/unlock the ranges of the file covered by the transaction.
static int	operation_read_prev (struct jtrans *ts, struct operation *op)
	Read the previous information from the disk into the given operation structure.
static int	jtrans_add_common (struct jtrans *ts, const void *buf, size_t count, off_t offset, enum op_direction direction)
	Common function to add an operation to a transaction.
int	jtrans_add_r (struct jtrans *ts, void *buf, size_t count, off_t offset)
	Add a read operation to a transaction.
int	jtrans_add_w (struct jtrans *ts, const void *buf, size_t count, off_t offset)
	Add a write operation to a transaction.
ssize_t	jtrans_commit (struct jtrans *ts)
	Commit a transaction.
ssize_t	jtrans_rollback (struct jtrans *ts)
	Rollback a transaction.
struct jfs *	jopen (const char *name, int flags, int mode, unsigned int jflags)
	Open a file.
int	jsync (struct jfs *fs)
	Sync a file.
int	jmove_journal (struct jfs *fs, const char *newpath)
	Change the location of the journal directory.
int	jclose (struct jfs *fs)
	Close a file opened with jopen().

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Function Documentation

static int lock_file_ranges	(	struct jtrans *	ts,
		int	mode
	)			[static]

Lock/unlock the ranges of the file covered by the transaction.

mode must be either F_LOCKW or F_UNLOCK. Returns 0 on success, -1 on error.

Definition at line 81 of file trans.c.

Referenced by jtrans_commit().

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static int operation_read_prev	(	struct jtrans *	ts,
		struct operation *	op
	)			[static]

Read the previous information from the disk into the given operation structure.

Returns 0 on success, -1 on error.

Definition at line 112 of file trans.c.

Referenced by jtrans_commit().

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static int jtrans_add_common	(	struct jtrans *	ts,
		const void *	buf,
		size_t	count,
		off_t	offset,
		enum op_direction	direction
	)			[static]

Common function to add an operation to a transaction.

Definition at line 139 of file trans.c.

Referenced by jtrans_add_r(), and jtrans_add_w().

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