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filesetup: limit rand map to the actual IO size, if needed
[fio.git]
/
lib
/
lfsr.h
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#ifndef FIO_LFSR_H
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#define FIO_LFSR_H
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#include <inttypes.h>
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#define FIO_MAX_TAPS 8
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struct lfsr_taps {
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unsigned int length;
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unsigned int taps[FIO_MAX_TAPS];
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};
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struct fio_lfsr {
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uint64_t last_val;
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uint64_t max_val;
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uint64_t num_vals;
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struct lfsr_taps taps;
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};
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int lfsr_next(struct fio_lfsr *fl, uint64_t *off);
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int lfsr_init(struct fio_lfsr *fl, uint64_t size, unsigned long seed);
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#endif