common.c File Reference

#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <libgen.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include "libjio.h"
#include "common.h"

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Functions
off_t	plockf (int fd, int cmd, off_t offset, off_t len)
	Like lockf(), but lock always from the given offset.
ssize_t	spread (int fd, void *buf, size_t count, off_t offset)
	Like pread() but either fails, or return a complete read.
ssize_t	spwrite (int fd, const void *buf, size_t count, off_t offset)
	Like spread() but for pwrite().
ssize_t	swritev (int fd, struct iovec *iov, int iovcnt)
	Like writev() but either fails, or return a complete write.
int	get_jdir (const char *filename, char *jdir)
	Store in jdir the default journal directory path of the given filename.
void	get_jtfile (struct jfs *fs, unsigned int tid, char *jtfile)
	Build the filename of a given transaction.
uint64_t	ntohll (uint64_t x)
	Convert a 64-bit value between network byte order and host byte order.
uint64_t	htonll (uint64_t x)
	Convert a 64-bit value between host byte order and network byte order.

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Function Documentation

off_t plockf	(	int	fd,
		int	cmd,
		off_t	offset,
		off_t	len
	)

Like lockf(), but lock always from the given offset.

Definition at line 21 of file common.c.

Referenced by free_tid(), get_tid(), jfsck(), jopen(), journal_new(), jpread(), jread(), jreadv(), jtruncate(), and lock_file_ranges().

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ssize_t spread	(	int	fd,
		void *	buf,
		size_t	count,
		off_t	offset
	)

Like pread() but either fails, or return a complete read.

If it returns less than count it's because EOF was reached

Definition at line 53 of file common.c.

Referenced by jpread(), jread(), jtrans_commit(), and operation_read_prev().

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ssize_t spwrite	(	int	fd,
		const void *	buf,
		size_t	count,
		off_t	offset
	)

Like spread() but for pwrite().

Definition at line 78 of file common.c.

Referenced by jfsck(), jopen(), and jtrans_commit().

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ssize_t swritev	(	int	fd,
		struct iovec *	iov,
		int	iovcnt
	)

Like writev() but either fails, or return a complete write.

Note that, as opposed to writev() it WILL MODIFY iov, in particular the iov_len fields.

Definition at line 101 of file common.c.

Referenced by journal_add_op(), journal_commit(), and journal_new().

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int get_jdir	(	const char *	filename,
		char *	jdir
	)

Store in jdir the default journal directory path of the given filename.

Definition at line 146 of file common.c.

Referenced by jfsck(), and jopen().

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void get_jtfile	(	struct jfs *	fs,
		unsigned int	tid,
		char *	jtfile
	)

Build the filename of a given transaction.

Assumes jtfile can hold at least PATH_MAX bytes.

Definition at line 173 of file common.c.

Referenced by free_tid(), jfsck(), and journal_new().

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uint64_t ntohll

(

uint64_t

x

)

Convert a 64-bit value between network byte order and host byte order.

Definition at line 184 of file common.c.

Referenced by ophdr_ntoh().

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uint64_t htonll

(

uint64_t

x

)

Convert a 64-bit value between host byte order and network byte order.

Definition at line 208 of file common.c.

Referenced by ophdr_hton().

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