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/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the GPL.
*/
#ifndef _LVM_DEVICE_H
#define _LVM_DEVICE_H
#include "lvm-types.h"
#include "list.h"
#include "uuid.h"
#define DEV_ACCESSED_W 0x00000001 /* Device written to? */
/*
* All devices in LVM will be represented by one of these.
* pointer comparisons are valid.
*/
struct device {
struct list aliases; /* struct str_list from lvm-types.h */
dev_t dev;
/* private */
int fd;
uint32_t flags;
char pvid[ID_LEN + 1];
};
struct device_list {
struct list list;
struct device *dev;
};
struct device_area {
struct device *dev;
uint64_t start; /* Bytes */
uint64_t size; /* Bytes */
};
/*
* All io should use these routines.
*/
int dev_get_size(struct device *dev, uint64_t *size);
int dev_get_sectsize(struct device *dev, uint32_t *size);
int dev_open(struct device *dev, int flags);
int dev_close(struct device *dev);
static inline int dev_fd(struct device *dev)
{
return dev->fd;
}
ssize_t raw_read(int fd, void *buf, size_t count);
ssize_t dev_read(struct device *dev, uint64_t offset, size_t len, void *buffer);
int64_t dev_write(struct device *dev, uint64_t offset, size_t len,
void *buffer);
int dev_zero(struct device *dev, uint64_t offset, size_t len);
static inline const char *dev_name(const struct device *dev)
{
return (dev) ? list_item(dev->aliases.n, struct str_list)->str :
"unknown device";
}
/* Return a valid device name from the alias list; NULL otherwise */
const char *dev_name_confirmed(struct device *dev);
static inline int dev_is_open(struct device *dev)
{
return dev->fd >= 0 ? 1 : 0;
}
/* FIXME Check partition type if appropriate */
#define is_lvm_partition(a) 1
/*
static inline int is_lvm_partition(const char *name)
{
return 1;
}
*/
#endif
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