mirror of
git://sourceware.org/git/lvm2.git
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94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
/*
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* Copyright (C) 2001 Sistina Software (UK) Limited.
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*
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* This file is released under the GPL.
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*/
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#ifndef _LVM_DEVICE_H
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#define _LVM_DEVICE_H
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#include "uuid.h"
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#include <fcntl.h>
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#define DEV_ACCESSED_W 0x00000001 /* Device written to? */
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#define DEV_REGULAR 0x00000002 /* Regular file? */
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#define DEV_ALLOCED 0x00000004 /* dbg_malloc used */
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/*
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* All devices in LVM will be represented by one of these.
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* pointer comparisons are valid.
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*/
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struct device {
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struct list aliases; /* struct str_list from lvm-types.h */
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dev_t dev;
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/* private */
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int fd;
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int open_count;
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uint32_t flags;
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uint64_t end;
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struct list open_list;
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char pvid[ID_LEN + 1];
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};
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struct device_list {
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struct list list;
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struct device *dev;
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};
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struct device_area {
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struct device *dev;
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uint64_t start; /* Bytes */
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uint64_t size; /* Bytes */
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};
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/*
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* All io should use these routines.
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*/
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int dev_get_size(struct device *dev, uint64_t *size);
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int dev_get_sectsize(struct device *dev, uint32_t *size);
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/* Use quiet version if device number could change e.g. when opening LV */
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int dev_open(struct device *dev);
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int dev_open_quiet(struct device *dev);
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int dev_open_flags(struct device *dev, int flags, int append, int quiet);
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int dev_close(struct device *dev);
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void dev_close_all(void);
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static inline int dev_fd(struct device *dev)
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{
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return dev->fd;
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}
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int dev_read(struct device *dev, uint64_t offset, size_t len, void *buffer);
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int dev_write(struct device *dev, uint64_t offset, size_t len, void *buffer);
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int dev_append(struct device *dev, size_t len, void *buffer);
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int dev_zero(struct device *dev, uint64_t offset, size_t len);
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void dev_flush(struct device *dev);
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struct device *dev_create_file(const char *filename, struct device *dev,
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struct str_list *alias);
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static inline const char *dev_name(const struct device *dev)
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{
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return (dev) ? list_item(dev->aliases.n, struct str_list)->str :
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"unknown device";
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}
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/* Return a valid device name from the alias list; NULL otherwise */
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const char *dev_name_confirmed(struct device *dev, int quiet);
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/* FIXME Check partition type if appropriate */
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#define is_lvm_partition(a) 1
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/*
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static inline int is_lvm_partition(const char *name)
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{
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return 1;
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}
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*/
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#endif
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