028c0cc16e
After restoring the existing code, make it work also when included in kernelspace code (which isn't currently the case, but at least this will prevent people from "fixing" it as just happened). Whitespace is fixed in next patch - it cluttered the diff too much. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
#ifndef __COW_H__
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#define __COW_H__
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#include <asm/types.h>
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#if defined(__KERNEL__)
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# include <asm/byteorder.h>
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# if defined(__BIG_ENDIAN)
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# define ntohll(x) (x)
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# define htonll(x) (x)
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# elif defined(__LITTLE_ENDIAN)
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# define ntohll(x) be64_to_cpu(x)
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# define htonll(x) cpu_to_be64(x)
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# else
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# error "Could not determine byte order"
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# endif
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#else
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/* For the definition of ntohl, htonl and __BYTE_ORDER */
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#include <endian.h>
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#include <netinet/in.h>
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#if defined(__BYTE_ORDER)
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#if __BYTE_ORDER == __BIG_ENDIAN
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# define ntohll(x) (x)
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# define htonll(x) (x)
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#elif __BYTE_ORDER == __LITTLE_ENDIAN
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# define ntohll(x) bswap_64(x)
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# define htonll(x) bswap_64(x)
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#else
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# error "Could not determine byte order: __BYTE_ORDER uncorrectly defined"
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#endif
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#else /* ! defined(__BYTE_ORDER) */
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# error "Could not determine byte order: __BYTE_ORDER not defined"
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#endif
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#endif /* ! defined(__KERNEL__) */
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extern int init_cow_file(int fd, char *cow_file, char *backing_file,
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int sectorsize, int alignment, int *bitmap_offset_out,
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unsigned long *bitmap_len_out, int *data_offset_out);
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extern int file_reader(__u64 offset, char *buf, int len, void *arg);
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extern int read_cow_header(int (*reader)(__u64, char *, int, void *),
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void *arg, __u32 *version_out,
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char **backing_file_out, time_t *mtime_out,
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unsigned long long *size_out, int *sectorsize_out,
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__u32 *align_out, int *bitmap_offset_out);
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extern int write_cow_header(char *cow_file, int fd, char *backing_file,
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int sectorsize, int alignment,
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unsigned long long *size);
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extern void cow_sizes(int version, __u64 size, int sectorsize, int align,
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int bitmap_offset, unsigned long *bitmap_len_out,
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int *data_offset_out);
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#endif
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/*
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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